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Journal articles on the topic "Slurry reactor"

1

Wei, Gui, and Hong Chang. "Design of Photocatalytic Reactor with Photocatalyst Film Loaded on Substrate." Advanced Materials Research 823 (October 2013): 214–17. http://dx.doi.org/10.4028/www.scientific.net/amr.823.214.

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After analytical studies of the characteristics of various slurry and supported photocatalytic reactors, a photocatalytic reactor with photocatalyst film loaded on substrate is designed in this paper. This reactor is characterized by the easy attachment and convenient installation & replacement of photocatalyst, higher light utilization, and complete photocatalytic reaction.
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Funken, K. H., C. Sattler, B. Milow, et al. "A comparison of prototype compound parabolic collector-reactors (CPC) on the road to SOLARDETOX technology." Water Science and Technology 44, no. 5 (2001): 271–78. http://dx.doi.org/10.2166/wst.2001.0304.

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Solar photocatalytic detoxification of non-biodegradable chlorinated hydrocarbon solvents (NBCS) is carried out in different concentrating and non concentrating devices using TiO2 as a photocatalyst fixed on the inner surface of the reaction tubes or as a slurry catalyst which has to be removed from the treated water. The reaction is most effective using 200 mg/l of TiO2 as a slurry in a non concentrating CPC reactor. The concentrating parabolic trough reactor has a poor activity because of its minor irradiated reactor surface. Catalyst coated glass tubes are less efficient then the used slurry catalyst. Their advantage is that no catalyst has not to be removed from the treated water and there is no loss of activity during treatment. Yet their physical stability is not sufficient to be competitive to the slurry catalyst. Nevertheless the degradation results are very promising and will possibly lead to commercial applications of this technology.
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Pratama, Diaz Liansyah, Siti Hanggita, and Agus Supriadi. "Uji Potensi Produksi Biogas pada Campuran Kiambang (Salvinia molesta) dan Limbah Jeroan Ikan Gabus (Channa striata) Menggunakan Batch Anaerobic Digester." Jurnal FishtecH 4, no. 2 (2016): 111–19. http://dx.doi.org/10.36706/fishtech.v4i2.3505.

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The purpose of this research is to utilize Salvinia biomass and snake head fish’s viscera waste as substrats for biogas production as a renewable energy sources by different treatment on substrate composition. This research was conducted on December 2014 until February 2015. This research used experimental method in anaerobic batch reactors with Liquid Displacement and Atomic Absorbtion methods using NaCl and NaOH solutions. The results in this research analyzed with descriptive method. The observed parameters were biogas and methane production rate and accumulation, and slurry’s parameters such as themperature, pH, BOD, COD, TS, VS, and C/N ratio. Results showed that the difference of substrates composition in reactor A produced the highest biogas and methane accumulation at 7.017 and 3.803 mL/kg slurry with the highest removal per kg slurry at 0.34 g BOD, 9.60 g COD, 47.24 g TS, 21.21 g VS. Whereas in reactor B produced the highest methane percentage at 60.73% and C/N removal at 1.23.
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Sordo, Carlos, Rafael Van Grieken, Javier Marugán, and Pilar Fernández-Ibáñez. "Solar photocatalytic disinfection with immobilised TiO2 at pilot-plant scale." Water Science and Technology 61, no. 2 (2010): 507–12. http://dx.doi.org/10.2166/wst.2010.876.

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The photocatalytic disinfection efficiency has been investigated for two immobilized TiO2 catalytic systems (wall reactor and fixed-bed reactor) in a solar pilot plant. Their performances have been compared with the use of a slurry reactor and the solar disinfection without catalyst. The use of photocatalytic TiO2 wall reactors does no show clear benefits over the solar disinfection process in the absence of catalyst. The reason is that the efficiency of the solar disinfection is so high that the presence of titania in the reactor wall reduces the global efficiency due to the competition for the absorption of photons. As expected, the maximum efficiency was shown by the slurry TiO2 reactor, due to the optimum contact between bacteria and catalyst. However, it is noticeable that the use of the fixed-bed reactor leads to inactivation rate quite close to that of the slurry, requiring comparable accumulated solar energy of about 6 kJ L−1 to achieve a 6-log decrease in the concentration of viable bacteria and allowing a total disinfection of the water (below the detection limit of 1 CFU mL−1). Not only the high titania surface area of this configuration is responsible for the bacteria inactivation but the important contribution of the mechanical stress has to be considered. The main advantage of the fixed-bed TiO2 catalyst is the outstanding stability, without deactivation effects after ten reaction cycles, being readily applicable for continuous water treatment systems.
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Zhen, Feng, Yuwan Pang, Tao Xing, et al. "Effect of Phase Change Materials and Phase Change Temperature on Optimization of Design Parameters of Anaerobic Reactor Thermal Insulation Structure." International Journal of Environmental Research and Public Health 19, no. 15 (2022): 9020. http://dx.doi.org/10.3390/ijerph19159020.

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Direct-absorption anaerobic reactors can maintain the fermentation process of microorganisms by utilizing solar absorption and scattering media in the biogas reactor to improve the slurry temperature. Direct-absorption heating alone can save the corresponding electric energy and ensure the normal fermentation process of the biogas slurry in the reactor, but there is still the problem of temperature fluctuation. In order to improve the stability of the fermentation process, it is proposed to optimize the design of this kind of reactor by adding paraffin phase change material. This article mainly studies the influence of paraffin phase change material added on the top and side of the reactor in the fermentation process and gives the corresponding design parameters for different climatic conditions, which lays a theoretical reference for the design process of this kind of reactor.
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Vlaev, Serafim D., and Jindřich Zahradník. "Energy effectiveness and working characteristics of different tower reactors for aerated slurry systems." Collection of Czechoslovak Chemical Communications 52, no. 11 (1987): 2624–39. http://dx.doi.org/10.1135/cccc19872624.

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Decisive hydrodynamic and mass transfer characteristics of different types of tower reactors (rotating disc reactor, single and multistage sieve-tray bubble columns, tower reactor with ejector gas distributor) as well as the energy effectiveness of their performance were compared with the purpose to establish a quantitative basis for the qualified choice of the proper reactor type according to demands of specific reaction processes. Selected design parameters included gas and solid phase holdup, kLaL, liquid phase residence time distribution, and axial distribution of the solid phase, the experiments were carried out in a wide range of solid phase concentration (0-20 wt. %) and particle sizes (2.3-280 μm). The experimental results proved that due to their favourable suspension characteristics and operation stability the rotating disc reactors can be advantageously used for slow reaction processes with low demands on the intensity of interfacial gas-liquid contact which can be carried out at low gas flow rates. On the other hand the multistage bubble column reactors proved to be superior devices for transport–controlled reaction processes regarding both the achievable rate of interfacial mass transfer and the overall energetic efficiency of phase contacting.
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Jiang, Shao Hua, and Yao Bin Chen. "The Axial Distribution of Gas Hold-Up and Solid Concentration in Slurry Reactor and its Effect to the Design of Slurry Reactor." Advanced Materials Research 560-561 (August 2012): 606–13. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.606.

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The axial distribution of gas hold-up and solid concentration in the slurry reactor are studied by the cold-model test, the principle of distribution is got. Furthermore, a new concept, fresh gas hold-up is put forward. As to the process of DME from synthesis gas by one-step process in the slurry reactor, according to the principle of axial distribution of gas hold-up and solid concentration in the reactor, the author put forward a novel design of the slurry, thus the space of the reactor is used fully, the reactive conversion can be raised, the productive capacity of reactor also can be raised.
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Heidarzadeh Vazifehkhoran, Ali, Alberto Finzi, Francesca Perazzolo, Elisabetta Riva, Omar Ferrari, and Giorgio Provolo. "Nitrogen Recovery from Different Livestock Slurries with an Innovative Stripping Process." Sustainability 14, no. 13 (2022): 7709. http://dx.doi.org/10.3390/su14137709.

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Ammonia (NH3) emissions deriving from the management of livestock manure have a significant environmental impact, and therefore it is important to reduce them. Among the available options, the process of NH3 stripping is promising to remove NH3 from manures and digestates recovering it as a mineral fertilizer (e.g., ammonium sulfate) that is more widely adoptable on farms. The traditional stripping process takes place in batches; however, in this study, a continuous process was evaluated using a lab scale plant in which four reactors were used in series with different hydraulic retention times (HRTs) of 12 or 20 days. The NH3 recovery of each reactor was studied for the liquid fraction of pig slurry, dairy cattle slurry and digestate, applying simple headspace aeration. For 20 days of HRT, totals of 92%, 83% and 67% of NH3 were stripped from the digestate, pig slurry and dairy cattle slurry, respectively. For 12 days of HRT, total NH3 recoveries were 83%, 60% and 41% for the digestate, pig slurry and dairy cattle slurry, respectively. The inlet NH3 concentration and inlet total alkalinity had a positive and negative effect, respectively, on the specific NH3 removal rate for each reactor. Stripping NH3 on farm scale can abate NH3 emissions in response to the environmental concerns of European policies.
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Wang, Shiqi, Rong Xie, Jiali Liu, Pu Zhao, Haitao Liu, and Xiaofang Wang. "Numerical Analysis of The Temperature Characteristics of a Coal—Supercritical Water-Fluidized Bed Reactor for Hydrogen Production." Machines 11, no. 5 (2023): 546. http://dx.doi.org/10.3390/machines11050546.

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Supercritical water gasification (SCWG) of coal is a promising clean coal technology, which discards the traditional coal combustion and oxidation reaction to release carbon dioxide and other pollutants and replaces coal with a gasification reduction reaction in supercritical water to finally convert coal into a hydrogen-rich gas product with no net carbon dioxide emissions and no pollutant emissions, and thus has received much attention in recent years. However, the experimental conditions of coal to the hydrogen reactor are harsh, costly, and not easy to visualize and analyze, so numerical calculation and simulation analysis are important for the design, optimization, and industrial scaling-up of the reactor. In order to study the effect of the temperature field on the hydrogen production rate of the coal supercritical water gasification hydrogen production reactor, a numerical simulation calculation model is developed for this reactor in this paper. Comparing the experimental data in the literature, the maximum relative error of the gasification product yield per kg of coal between the two is less than 5%, which verifies the accuracy of the model built and the numerical method adopted in this paper. On this basis, the effects of supercritical water temperature and coal slurry temperature on the reactor’s gasification products and reaction rate were investigated in depth. The results show that increasing the supercritical water temperature is beneficial to improve the reactor hydrogen production efficiency, while the high coal slurry temperature is not conducive to adequate reaction, thus reducing the hydrogen production efficiency. For the laboratory coal supercritical water gasification to hydrogen reactor studied in this paper, the ideal temperature of supercritical water is 850~900 K, and the ideal temperature of coal slurry is 400–450 K. The conclusions of this paper can provide some reference for subsequent industrial scale-up studies of the reactor.
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Mulopo, J., J. N. Zvimba, H. Swanepoel, L. T. Bologo, and J. Maree. "Regeneration of barium carbonate from barium sulphide in a pilot-scale bubbling column reactor and utilization for acid mine drainage." Water Science and Technology 65, no. 2 (2012): 324–31. http://dx.doi.org/10.2166/wst.2012.857.

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Batch regeneration of barium carbonate (BaCO3) from barium sulphide (BaS) slurries by passing CO2 gas into a pilot-scale bubbling column reactor under ambient conditions was used to assess the technical feasibility of BaCO3 recovery in the Alkali Barium Calcium (ABC) desalination process and its use for sulphate removal from high sulphate Acid Mine Drainage (AMD). The effect of key process parameters, such as BaS slurry concentration and CO2 flow rate on the carbonation, as well as the extent of sulphate removal from AMD using the recovered BaCO3 were investigated. It was observed that the carbonation reaction rate for BaCO3 regeneration in a bubbling column reactor significantly increased with increase in carbon dioxide (CO2) flow rate whereas the BaS slurry content within the range 5–10% slurry content did not significantly affect the carbonation rate. The CO2 flow rate also had an impact on the BaCO3 morphology. The BaCO3 recovered from the pilot-scale bubbling column reactor demonstrated effective sulphate removal ability during AMD treatment compared with commercial BaCO3.
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Dissertations / Theses on the topic "Slurry reactor"

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Bigg, Torill. "An iron metal slurry reactor for wastewater treatment." Thesis, Cranfield University, 2002. http://dspace.lib.cranfield.ac.uk/handle/1826/11428.

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The corrosion of iron is a very old and complex phenomenon. Its employment for the treatment of wastewater began in the earliest around ten years ago, with few earlier exceptions. Most researchers have considered its application to groundwater remediation, and its use a a permeable reactive barrier material is well established. The aim of this research is to measure parameters that govern zero-valent iron treatment of wastewater with the treatment of industrial influents prior to discharge to municipal sewage treatment works particularly in mind.
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Bigg, T. "In iron metal slurry reactor for wastewater treatment." Thesis, Cranfield University, 2002. http://dspace.lib.cranfield.ac.uk/handle/1826/11428.

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The corrosion of iron is a very old and complex phenomenon. Its employment for the treatment of wastewater began in the earliest around ten years ago, with few earlier exceptions. Most researchers have considered its application to groundwater remediation, and its use a a permeable reactive barrier material is well established. The aim of this research is to measure parameters that govern zero-valent iron treatment of wastewater with the treatment of industrial influents prior to discharge to municipal sewage treatment works particularly in mind.
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Kolhe, D. S. "Studies in catalytic hydrogenation of acetylenic compounds in a slurry reactor." Thesis(M.Sc.), CSIR-National Chemical Laboratory, Pune, 1987. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2240.

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Steynberg, Andre Peter. "Process intensification for the iron-catalysed slurry-phase Fischer-Tropsch Reactor System." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/13279.

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Includes bibliographical references.<br>A set of operating conditions was identified with the potential to enable improved slurryphase reactor productivity for hydrocarbon production using Fischer-Tropsch synthesis. Compared to the most relevant prior art publication, this requires operation at higher gas velocity, higher catalyst concentration and at higher temperature and/or pressure. The closest prior art proposal was published by Van der Laan et al. (1999) and a target was set to improve the reactor productivity by at least 50 %, relative to this reference, while also ensuring stable catalyst performance. Prediction of gas holdup in the reactor is essential to determine the reactor productivity and previous correlations used to predict gas holdup are potentially unreliable for extrapolation to the new proposed conditions. A new approach is adapted, from previous theoretical approaches, to provide a more fundamental and reliable basis for gas holdup prediction. Referred to as the ¡®adapted two-phase theory¡¯ it predicts the gas holdup at any slurry solids concentration using data from a representative solids-free liquid. This approach is shown to provide accurate predictions for paraffinic liquids using data covering a wide range of solids concentrations. Two laboratory reactor experiments were performed, at 260 and 270 ¢ªC, to characterise the selected catalyst performance at conditions relevant to the newly proposed operating regime. An achievable reactor performance was calculated corresponding to the catalyst performance from the experiment at 270 ¢ªC and using the new approach to predict gas holdup. Compared to the proposal by Van der Laan et al. (1999), a reactor with a given diameter is able to produce almost double the amount of product (94 % more with a lower slurry bed height). This is achievable by using higher catalyst concentrations and, most importantly, using a higher operating temperature. The undesirable methane selectivity, at or below 4 %, is still acceptable when operating at 270 ¢ªC. In spite of the higher reactor productivity with increasing temperature, the optimum operating temperature, in the range from 250 to 270 ¢ªC, may depend on the selectivity to the desired hydrocarbon products. The scope for further potential reactor productivity improvement is described. More work is needed to accurately quantify the selected iron catalyst selectivity performance, in the proposed temperature range, but the hydrocarbon selectivity was found to be insensitive to other operating conditions (i.e. pressure and gas composition). It is now possible to better quantify the reactor productivity in the trade-offs which are made with the selectivity performance and the overall plant design configuration which requires recycle of carbon dioxide to the methane reformers to adjust feed gas H2/CO ratio for natural gas applications. The carbon dioxide selectivity for the selected catalyst at the conditions tested was found to be too high for gas-to-liquid (GTL) applications using a natural gas feed.
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Lamaignère, Valérie. "Effects of hydrodynamic stress on growing Saccharomyces cerevisiae in a slurry reactor." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/6081.

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Includes bibliography.<br>The objectives of this research thesis were to understand and quantify biological responses to hydrodynamic stress by investigating the activity of the yeast Saccharomyces cerevisiae, cultivated in the presence of a range of solid loadings, solid sizes and agitation rates. The influence of inoculum size, inoculum age and type of agitator were also investigated. This study was carried out with the intention of identifying biological responses to hydrodynamic stress and modelling observed effects on microbial activity.
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Peña, Zapata Diego. "Identification of deactivation mechanisms of cobalt Fischer-Tropsch catalysts in slurry reactor." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10149/document.

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La synthèse Fischer -Tropsch (SFT) produit des carburants liquides ultra-propres, ainsi que des produits chimiques à partir du gaz de synthèse issu d’une large gamme de matières premières : gaz naturel, gaz de schiste, charbon, biomasse. Les catalyseurs supportés à base de cobalt sont la meilleure option pour la SFT à basse température, en raison de leur grande stabilité et leur sélectivité en hydrocarbures lourds. Néanmoins, ces catalyseurs se désactivent avec le temps au cours de la réaction. La désactivation réduit la durée de vie et la productivité de ces catalyseurs. Par conséquent, la désactivation reste un défi majeur de la SFT. Dans ce travail, nous avons identifié les mécanismes les plus pertinents de la désactivation du catalyseur à base de cobalt dans le réacteur slurry : frittage du cobalt, attrition du catalyseur et dépôt de carbone. Il est démontré que la vitesse de désactivation dépend des conditions opératoires. Les résultats expérimentaux suggèrent que l'attrition du catalyseur est fortement influencée par la pression partielle d’eau dans le réacteur. La pression partielle élevée d’eau favorise la mobilité des nanoparticules de cobalt à la surface et leur frittage. Des agglomérats de cobalt de quelques microns situés sur des grains de catalyseur, ainsi que des particules métalliques de cobalt individuelles ont été observés dans les catalyseurs usés. La formation des agglomérats de cobalt a été favorisée à des vitesses spatiales basses et dans le gaz de synthèse pauvre en hydrogène. La dilution du gaz de synthèse au début de la réaction diminue l’attrition et réduit la formation des agglomérats de cobalt. Des hydrocarbures, des alcools, des cétones, des aldéhydes, des acides organiques ont été détectés dans les catalyseurs usés ; α -oléfines étant les espèces les plus abondantes. Les acides carboxyliques et les aldéhydes cinnamiques semblent être le plus néfastes pour les performances catalytiques. Le schéma de la formation de différentes espèces de carbone à la surface des catalyseurs de cobalt dans le réacteur slurry été proposé dans le manuscrit<br>The Fischer-Tropsch Synthesis (FTS) produces ultra-clean liquid fuels and chemicals via conversion of syngas from a wide range of feedstocks: natural gas, shale gas coal and biomass. Supported cobalt-based catalysts are the best option for the low temperature FTS, due to their high stability and selectivity toward heavy paraffinic hydrocarbons. Nevertheless, cobalt catalysts deactivate with time on stream. This leads to a decrease in catalyst lifetime and productivity. Hence, catalyst deactivation remains a major challenge of FTS. In this work we identified cobalt sintering, catalyst attrition and carbon deposition as the most relevant catalyst deactivation mechanisms in slurry reactor; the deactivation rate being influenced by the operating conditions. The experimental results suggest that catalyst attrition is strongly affected by water partial pressure in the catalytic reactor. High water partial pressure favours mobility of cobalt nanoparticles on surface and cobalt sintering. Both cobalt agglomerates of micron size located on catalyst grains and detached cobalt metal particles were observed in the spent catalysts. The formation of cobalt agglomerates was favoured at lower gas space velocity and in H2-deficient syngas. Syngas dilution at the beginning of reaction decreases the degree of attrition and reduces cobalt agglomerate formation. Hydrocarbons, alcohols, ketones, aldehydes, organic acids were detected in the spent catalysts; α-olefins being the most abundant species. Carboxylic acids and alpha-alkyl cinnamic aldehyde seem to be most detrimental for the catalytic performance. A tentative schema of formation of different carbon species in cobalt catalysts during FTS in slurry reactor has been proposed in the manuscript
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Peña, Zapata Diego. "Identification of deactivation mechanisms of cobalt Fischer-Tropsch catalysts in slurry reactor." Electronic Thesis or Diss., Lille 1, 2013. http://www.theses.fr/2013LIL10149.

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La synthèse Fischer -Tropsch (SFT) produit des carburants liquides ultra-propres, ainsi que des produits chimiques à partir du gaz de synthèse issu d’une large gamme de matières premières : gaz naturel, gaz de schiste, charbon, biomasse. Les catalyseurs supportés à base de cobalt sont la meilleure option pour la SFT à basse température, en raison de leur grande stabilité et leur sélectivité en hydrocarbures lourds. Néanmoins, ces catalyseurs se désactivent avec le temps au cours de la réaction. La désactivation réduit la durée de vie et la productivité de ces catalyseurs. Par conséquent, la désactivation reste un défi majeur de la SFT. Dans ce travail, nous avons identifié les mécanismes les plus pertinents de la désactivation du catalyseur à base de cobalt dans le réacteur slurry : frittage du cobalt, attrition du catalyseur et dépôt de carbone. Il est démontré que la vitesse de désactivation dépend des conditions opératoires. Les résultats expérimentaux suggèrent que l'attrition du catalyseur est fortement influencée par la pression partielle d’eau dans le réacteur. La pression partielle élevée d’eau favorise la mobilité des nanoparticules de cobalt à la surface et leur frittage. Des agglomérats de cobalt de quelques microns situés sur des grains de catalyseur, ainsi que des particules métalliques de cobalt individuelles ont été observés dans les catalyseurs usés. La formation des agglomérats de cobalt a été favorisée à des vitesses spatiales basses et dans le gaz de synthèse pauvre en hydrogène. La dilution du gaz de synthèse au début de la réaction diminue l’attrition et réduit la formation des agglomérats de cobalt. Des hydrocarbures, des alcools, des cétones, des aldéhydes, des acides organiques ont été détectés dans les catalyseurs usés ; α -oléfines étant les espèces les plus abondantes. Les acides carboxyliques et les aldéhydes cinnamiques semblent être le plus néfastes pour les performances catalytiques. Le schéma de la formation de différentes espèces de carbone à la surface des catalyseurs de cobalt dans le réacteur slurry été proposé dans le manuscrit<br>The Fischer-Tropsch Synthesis (FTS) produces ultra-clean liquid fuels and chemicals via conversion of syngas from a wide range of feedstocks: natural gas, shale gas coal and biomass. Supported cobalt-based catalysts are the best option for the low temperature FTS, due to their high stability and selectivity toward heavy paraffinic hydrocarbons. Nevertheless, cobalt catalysts deactivate with time on stream. This leads to a decrease in catalyst lifetime and productivity. Hence, catalyst deactivation remains a major challenge of FTS. In this work we identified cobalt sintering, catalyst attrition and carbon deposition as the most relevant catalyst deactivation mechanisms in slurry reactor; the deactivation rate being influenced by the operating conditions. The experimental results suggest that catalyst attrition is strongly affected by water partial pressure in the catalytic reactor. High water partial pressure favours mobility of cobalt nanoparticles on surface and cobalt sintering. Both cobalt agglomerates of micron size located on catalyst grains and detached cobalt metal particles were observed in the spent catalysts. The formation of cobalt agglomerates was favoured at lower gas space velocity and in H2-deficient syngas. Syngas dilution at the beginning of reaction decreases the degree of attrition and reduces cobalt agglomerate formation. Hydrocarbons, alcohols, ketones, aldehydes, organic acids were detected in the spent catalysts; α-olefins being the most abundant species. Carboxylic acids and alpha-alkyl cinnamic aldehyde seem to be most detrimental for the catalytic performance. A tentative schema of formation of different carbon species in cobalt catalysts during FTS in slurry reactor has been proposed in the manuscript
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Inga, Juan Ricardo. "Hydrodynamic studies and reactor modelling of a three phase slurry reactor in Fischer Tropsch application / Juan Ricardo Inga." Thesis, Potchefstroom University for Christian Higher Education, 1992. http://hdl.handle.net/10394/9611.

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In this .study the hydrodynamic characteristics of the slurry bed reactor was investigated. This study was aimed to the under" standing of the important parameters that describe the hydrodynamic regime and their quantification. In order to determine the relevant parameters the use of a theoretical model was necessary. This model should include all the hydrodynamic parameters in form of correlations. A sensitivity study was done and the parameters which have great impact were determined. An extensive literature review was done in order to gather the experience of previous investigations. Unfortunately all the experience was obtained in a different hydrodynamic regime and therefore the published results could not be used directly in our study. Hydrodynamic test were performed in the works pilot plant at the operating conditions. Unlike a laboratory, the instrumentation used was the one use in commercial reactors with the commercially acceptable range of accuracy. A mass balance was done around the reactor to ensure that the data was sound. Heat balance was also performed and the study of the heat transfer coefficient was performed. Although this was beyond the scope of this study was here included due to its importance in the design of slurry bed reactors. An existing computer model was adapted for the churn-turbulent regime and the hydrodynamic parameters were implemented. This reactor model was coupled with flashes subroutines in order to have a complete reactor train. This computer model was used for the design of the Slurry Bed Commercial Reactor to be commissioned on 1993 at Sasol One.<br>Thesis (MIng (Chemies))--PU for CHE, 1993
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Masse, Daniel I. "Psychrophilic anaerobic digestion of swine manure slurry in intermittently fed sequencing batch reactor." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9611.

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Animal manure management practices, principally in regions where there is a surplus of manure are often detrimental to the environment and also represent a potential hazard to human and animal health. The primary objective of this study was to evaluate the feasibility of psychrophilic anaerobic digestion (PAD) in sequencing batch reactors (SBR) as a low cost and easy to operate process to: (a) reduce the pollution potential of swine manure slurry; (b) recover energy; and (c) reduce odours of swine manure slurry. Experiments were carried out in 12 40-Litre SBRs operated under different conditions. Experimental results indicated that PAD of swine manure slurry at 20$\sp\circ$C in intermittently fed SBR: (1) reduced the pollution potential of swine manure slurry by removing 85 to 95% of the soluble chemical oxygen demand (SCOD); (2) produced biogas at rates from 0.48 to 0.66 L of CH$\sb4$ per gram of volatile solids (VS) fed; and (3) successfully reduced odours. In all experimental runs, the PAD of swine manure slurry in SBR was found very stable. Other interesting findings were that PAD in SBR process does not require mixing and can be intermittently fed only once and three times a week without affecting the SBR stability and performance. The second objective of this study was to model PAD of swine manure slurry in SBR in order to: (1) increase knowledge of PAD in SBR; and (2) predict process performance. Existing mathematical models of anaerobic digestion formed the basis for the two models proposed in this study for PAD in SBR. These two models were: (1) a simple model that considered only two populations of bacteria as well as particulate solubilization rate; and (2) an advanced model that considered six populations of bacteria as well as the interaction between the biological, liquid (physico-chemical) and gas phases. The simple model predicted reasonably well the trend in VA, SCOD accumulation as well as methane production. The advanced model which made use of a large number of kinetic constants also predicted reasonably well the methane production as well as the trend in accumulation in acetic, propionic and butyric acids, dissolved and gaseous hydrogen and SCOD.
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Lefebvre, Jonathan [Verfasser]. "Three-phase CO2 methanation Methanation reaction kinetics and transient behavior of a slurry bubble column reactor / Jonathan Lefebvre." München : Verlag Dr. Hut, 2019. http://d-nb.info/1181515408/34.

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Books on the topic "Slurry reactor"

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Superfund Innovative Technology Evaluation Program (U.S.), ed. Pilot-scale demonstration of a slurry-phase biological reactor for creosote-contaminated soil. U.S. Environmental Protection Agency, Superfund Innovative Technology Evaluation, 1993.

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Superfund Innovative Technology Evaluation Program (U.S.), ed. Pilot-scale demonstration of a slurry-phase biological reactor for creosote-contaminated soil. U.S. Environmental Protection Agency, Superfund Innovative Technology Evaluation, 1993.

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Superfund Innovative Technology Evaluation Program (U.S.), ed. Pilot-scale demonstration of a slurry-phase biological reactor for creosote-contaminated soil. U.S. Environmental Protection Agency, Superfund Innovative Technology Evaluation, 1993.

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Majid, Dosani, and Risk Reduction Engineering Laboratory (U.S.), eds. On-site engineering report of the slurry-phase biological reactor for pilot-scale testing on contaminated soil: Project summary. Risk Reduction Engineering Laboratory, U.S. Environmental Protection Agency, 1993.

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Majid, Dosani, and Risk Reduction Engineering Laboratory (U.S.), eds. On-site engineering report of the slurry-phase biological reactor for pilot-scale testing on contaminated soil: Project summary. Risk Reduction Engineering Laboratory, U.S. Environmental Protection Agency, 1993.

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Majid, Dosani, and Risk Reduction Engineering Laboratory (U.S.), eds. On-site engineering report of the slurry-phase biological reactor for pilot-scale testing on contaminated soil: Project summary. Risk Reduction Engineering Laboratory, U.S. Environmental Protection Agency, 1993.

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Vinke, Heinz. The effect of catalyst particle-to-bubble adhesion on the mass transfer in agitated slurry reactors. s.n.], 1992.

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M, Singh, and United States. National Aeronautics and Space Administration., eds. Theoretical considerations for reaction-formed silicon carbide (RFSC) formation by molten silicon infiltration into slurry-derived preforms. National Aeronautics and Space Administration, 1993.

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Stangle, Gregory Charles. Mass transfer with chemical reaction in a three-phase foam slurry reactor. 1985.

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Pilot-scale demonstration of a slurry-phase biological reactor for creosote-contaminated soil. U.S. Environmental Protection Agency, Superfund Innovative Technology Evaluation, 1993.

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Book chapters on the topic "Slurry reactor"

1

Beenackers, A. A. C. M., and W. P. M. Swaaij. "Slurry Reactors, Fundamentals and Applications." In Chemical Reactor Design and Technology. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4400-8_13.

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Gamwo, Isaac K., Dimitri Gidaspow, and Jonghwun Jung. "Slurry Bubble Column Reactor Optimization." In ACS Symposium Series. American Chemical Society, 2007. http://dx.doi.org/10.1021/bk-2007-0959.ch017.

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Doğu, Gülşen, Gökhan Ölmez, and Timur Doğu. "Removal of SO2 with Lime Slurry in a Spray Dryer." In Chemical Reactor Technology for Environmentally Safe Reactors and Products. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2747-9_20.

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Karthikeyan, S., C. Preethi, and R. Kathirvel. "Evaluation of a Slurry Photocatalytic Membrane Reactor on Degradation of Naproxen." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-2092-0_5.

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Buwa, Vivek V., Shantanu Roy, and Vivek V. Ranade. "Three-phase slurry reactors." In Multiphase Catalytic Reactors. John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119248491.ch6.

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Böhm, L. L. "The Slurry Polymerization Process with Super-Active Ziegler-Type Catalyst Systems: From the 2 L Glass Autoclave to the 200 m3 Stirred Tank Reactor." In Polyolefins: 50 years after Ziegler and Natta I. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/12_2013_214.

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Arastoopour, Hamid, Dimitri Gidaspow, and Robert W. Lyczkowski. "Synthetic Gas Conversion to Liquid Fuel Using Slurry Bubble Column Reactors." In Mechanical Engineering Series. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68578-2_6.

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Nocentini, M., and F. Magelli. "Solid Distribution in Slurry Reactors Stirred with Multiple Impellers: Continuous Flow Systems." In Fluid Mechanics and Its Applications. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-015-7973-5_9.

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Alfano, Orlando M., Alberto E. Cassano, Rodolfo J. Brandi, and María L. Satuf. "A Methodology for Modeling Slurry Photocatalytic Reactors for Degradation of an Organic Pollutant in Water." In Photocatalysis and Water Purification. Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527645404.ch13.

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Meng, Fanhui, and Muhammad Asif Nawaz. "Review of Slurry Bed Reactor for Carbon One Chemistry." In Slurry Technology - New Advances [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.109094.

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The slurry bed reactor has many advantages, which make it very suitable for gas-to-liquid processes, especially for the highly exothermic reactions. This chapter reviews three types of slurry bed reactors and their comparisons, including the mechanically stirred slurry reactor, bubble column slurry reactor and three-phase fluidized bed reactor. The application of the slurry bed reactors in carbon one (C1) chemistry for syngas conversion to different valuable chemicals is presented, which includes four typical exothermic reactions, that is, the Fischer-Tropsch synthesis to oil, methanol synthesis, dimethyl ether synthesis and synthetic natural gas synthesis. The operation parameters and performance of slurry bed reactor, fixed bed reactor and fluidized bed reactor are compared while discussing the reasons of catalyst deactivation. Since, the development trend of slurry bed reactor for C1 chemistry is finally proposed.
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Conference papers on the topic "Slurry reactor"

1

Tossey, Brett M., John Shingledecker, and Barbara (Nikki) Padgett. "Technical Root Cause Analysis of Localized Corrosion in Wet Flue Gas Desulfurization Slurry at Coal-Fired Power Stations." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-4442.

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Abstract Recent experience with stainless steels in wet flue gas desulfurization service has shown rapid localized attack. This paper discusses a brief historical perspective on the material performance in wet flue gas desulfurization (WFGD) and the findings of a technical root cause analysis (TRCA). Observations of attacked WFGD absorbers shows pitting and crevice corrosion near welds in the immersion zone and inside spray headers. All of the absorbers that were the subject of the TRCA were forced-oxidation limestone absorbers. Vertical spray towers and jet bubbling reactors were inspected and discussed.
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Dille, Eldon R., and R. P. Gaikwad. "Effect of Water Treatment Chemicals on Limestone/Sulfur Dioxide Reaction in Flue Gas Desulfurization Systems." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94411.

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Abstract A simple laboratory test has been developed which simulates the reaction between limestone/water and sulfur dioxide in flue gas desulfurization systems. By adding various chemicals, in differing concentrations, to the limestone/water mixture, the quantitative impact on the sulfur dioxide/limestone reaction can be qualified and quantified. This paper will present the impact of several water treatment chemicals on the reaction of limestone and sulfur dioxide. An attempt has been made to predict the effect through mathematical correlations. All of the additive chemicals tend to decrease the rate of dissolution of limestone to various degrees. Some of the chemicals retard crystal growth thus adversely impacting solids separation in the thickener. The physical appearance of the crystal growth retarded limestone absorber slurry approaches a colloidal suspension.
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Thomas, Brian, and D. C. Agarwal. "Successful Replacement of Alloy 30, UNS N06030 with Alloy 31, UNS N08031 at a Phosphoric Acid Plant." In CORROSION 2007. NACE International, 2007. https://doi.org/10.5006/c2007-07216.

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Abstract In the fertilizer industry, phosphoric acid, ammonia and their derivatives along with potassium compounds are the major fertilizers providing the necessary soil nutrients for the agricultural industry. Ammonia, superphosphates, phosphoric acid and potassium chloride become the building blocks of the fertilizer industry and from these basic materials, hundreds of different formulations are produced to fit the individual soil and crop needs such as DAP (di-ammonium phosphate) and MAP (mono-ammonium phosphate) and others. More than 95% of the world's phosphoric acid production is by the wet acid process, balance being "furnace acid grade for food and other additives. Almost 100% of this wet process acid is used in the manufacture of various fertilizers. Wet phosphoric acid manufacturing appears to be relatively simple involving the reaction of phosphate rock with concentrated sulfuric acid yielding phosphoric acid (26 to 28% P2O5) and calcium sulfate slurry, followed by filtration of the acid slurry to remove particulate matter, followed by concentration and purification of the phosphoric acid. Even though the process appears to be relatively simple and straightforward, severe erosion / corrosion problems have been encountered. Erosion is caused by particulate matter of phosphate rock and gypsum solids moving at high velocities whereas corrosion is due to the presence of sulfuric acid, phosphoric acid, hydrofluoric acid, hydrofluosilisic acid, chlorides, fluorides, organic compounds and oxidizing species such as ferric ions and other corrodents which can dramatically affect the active / passive behavior of metals and alloys used in this industry. The recent trend to increase the concentration of the final product involves use of higher operating temperatures, which increases the severity of the corrosive environments. This paper presents data, both lab and field, on some of the typical alloys and various components used in this industry to combat the corrosion problems with special emphasis on a newly developed super-austenitic high chromium 6 Mo alloy 31, UNS N08031 which has helped to solve/mitigate both the erosion and corrosion problems in this industry in a cost effective manner, both in USA and abroad (Morocco, Jordan, Israel). This alloy has successfully replaced alloy UNS N06030 in the author’s plant in Rock Springs, Wyoming and for the last three years has been performing exceedingly well.
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Charles, Jacques, Jean-Pierre Audouard, and Michel Verneau. "Metallic Answers for F.G.D. Systems." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98480.

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Abstract To reduce the air pollution caused by fossil energy boilers, flue gas desulfurization units are more and more used in North America, European countries and Asean. The most common technology consists of scrubbing the polluted gas with a slurry of lime or limestone in water. In certain zones of scrubber (absorber) where the reaction between polluted gas and the solution is not complete, acidic condensation can occur and, combined with high temperatures, chlorides and/or fluorides, lead to very aggressive conditions. Generally, metallic materials present the best solution in terms of reliability ad cost. Since the corrosion resistance of standard stainless steels, such as 316L, is very limited in such environments, highly alloyed stainless steels or nickel based alloys are generally used for the most corrosive conditions. Building scrubber units require welded materials. Welded joints are made-up of different zones: thermal cycles induce structural modifications, filler materials induce chemical composition variations, and weld beads induce geometric variations. Welds are very often the weak point for the corrosion resistance. To increase the corrosion resistance of the welds, new stainless steel materials with improved weldability have been developed proposing higher corrosion resistance properties (≥ 6 Mo grades, N08926 or S32050) or high corrosion resistance and high mechanical properties (duplex S31803/S32205 and superduplex S32550/S32520). More recently, a high nitrogen overalloyed austenitic grade (S31266) providing very high corrosion resistance and high mechanical properties has been developed. This new grade with high nitrogen content (0.45% by weight) exhibits exceptional corrosion resistance properties in both unwelded and welded conditions. Nickel based alloys have been also investigated both in solid and clad materials. The aim of this paper is to evaluate and compare the behaviour of these materials in simulated FGD environments, particularly in welded conditions. Several tests representative of industrial conditions have been selected. Test conditions simulating the very corrosive environments of gas cleaning systems: low pH, high temperature and high chloride levels have been investigated. The critical conditions have been determined for each material in unwelded and welded conditions. The results are discussed in terms of technical efficiency and potential applications.
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Kostedt, William L., Mickal A. Witwer, David W. Mazyck, Tony Powell, and Brian Butters. "A Slurry-Based Photocatalytic Reactor with Slurry Separation for Water Recovery." In International Conference On Environmental Systems. SAE International, 2005. http://dx.doi.org/10.4271/2005-01-2994.

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A., Alfiya, Pranavya J. R., Indu M. S, and Sajithkumar K. J. "Comparative Assessment of Continuous Flow Photocatalytic Oxidation Reactors for Organic Wastewater Degradation." In 6th International Conference on Modeling and Simulation in Civil Engineering. AIJR Publisher, 2023. http://dx.doi.org/10.21467/proceedings.156.20.

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Photocatalysis is an environmentally friendly technique for removing organic pollutants such as dyes, pesticides, etc. The photo reactors could be of the slurry type and fixed bed type. Continuous flow photocatalytic reactors generally are fixed bed-type reactors. Slurry type designs like loop thin-film slurry flat-plate photoreactors, step aeration slurry reactors etc. were also tried out for continuous flow operations. Continuous flow photocatalytic reactors have become one of the most ensuring methods for the treatment of mass water. However, uniform dispersion of the photocatalyst within the wastewater volume is still existing as a challenge. Different reactor designs like immobilized bed reactors (packed bed reactor and fluidized bed reactor), annular reactor with photocatalyst coated on inner/outer cylinder, photocatalytic membrane reactors, tubular reactors, microreactors, etc. are tested for their efficiency. This review tries to provide a generalized comparison of the relative merits and demerits of these reactor designs and immobilization methods on the degradation of organic contaminants.
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Strasser, W., and A. Wonders. "Commercial scale slurry bubble column reactor optimization." In ADVANCES IN FLUID MECHANICS 2008. WIT Press, 2008. http://dx.doi.org/10.2495/afm080271.

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Gamwo, Isaac K., Yee Soong, and John S. Halow. "A Three-Phase Hydrodynamic Model for Slurry Reactors." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1989.

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Abstract A predictive three-phase hydrodynamic model for slurry-bubble column reactors has been developed from the point of view of kinetic theory of granular flow (Gidaspow, 1994a). The model is based on first principles method and can provide a complete description of the flow field. To experimentally validate the code, local gas holdups have been measured at the National Energy Technology Laboratory (NETL) by inserting a dual conductivity probe horizontally into the reactor at various locations. Predicted gas holdups are in reasonable agreement with the experimental results in the bulk region of the reactor.
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Dunzik-Gougar, Mary Lou, Francis van Ravenswaay, Leszek Kuczynski, and Johan M. F. Slabber. "Microbial Treatment of Irradiated Graphite for Separation of Radioisotope 14C From Bulk Graphite 12C." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58119.

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The Pebble Bed Modular Reactor is being developed in South Africa. Important for PBMR implementation is a viable strategy for waste management. Irradiated graphite from fuel and structural components is too voluminous for practical treatment with traditional higher level waste methods and too radioactive to recycle. To clean the graphite of radionuclides, a two-step process is being pursued: (1) non-carbon radionuclides (activation products, fission products and actinides) are removed on an elemental basis by a chemical or microbial process. (2) 14C requires separation at an isotopic level, which would be impractical with established methods (gaseous diffusion or centrifuge). PBMR is investigating a method of isotope separation using biofractionation. Preliminary experiments indicate that microorganisms do separate radioactive 14C from stable 12C. An aqueous slurry of 14C-spiked, powdered graphite was “fed” to the microbes for 15–18 hours. The microbes initially contained only background levels of 14C, i.e. orders of magnitude less than the slurry. In post-experiment analyses, a sample of the microbes was found to contain approximately twice the amount of 14C present in the bulk slurry material. Experiments are underway to further quantify and verify these results, which indicate distinct microbial processing mechanisms for 14C and 12C. The most current results will be presented.
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Cai, Yating. "Numerical Simulation on a Gas Distributor Used In Slurry Column Reactor." In 2015 2nd International Conference on Electrical, Computer Engineering and Electronics. Atlantis Press, 2015. http://dx.doi.org/10.2991/icecee-15.2015.128.

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Reports on the topic "Slurry reactor"

1

Fox, J. M., B. D. Degen, G. Cady, et al. Slurry reactor design studies. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6094135.

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Fox, J., and B. Degen. Slurry reactor design studies. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6844613.

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Dimitri Gidaspow. Hydrodynamic models for slurry bubble column reactor. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/750383.

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Prakash, A., and P. G. Bendale. Design of slurry reactor for indirect liquefaction applications. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/5687528.

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Shollenberger, K. A., J. R. Torczynski, N. B. Jackson, and T. J. O`Hern. Experimental characterization of slurry bubble-column reactor hydrodynamics. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/292851.

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Bernard A. Toseland, Ph D. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR)TECHNOLOGY. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/783047.

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Bernard A. Toseland, Ph D. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/783049.

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Toseland, B. A. Engineering Development of Slurry Bubble Column Reactor (SBCR) Technology. Office of Scientific and Technical Information (OSTI), 1998. http://dx.doi.org/10.2172/1304.

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Bernard A Toseland, Ph D. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/793999.

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Bernard A Toseland, Ph D. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/794000.

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