Academic literature on the topic 'Carbon vacuum adsorption process'

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Journal articles on the topic "Carbon vacuum adsorption process"

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Bahrami, Hussein, Jaber Safdari, Ali Moosavian, and Meisam Torab-Mostaedi. "Adsorption of hydrogen fluoride onto activated carbon under vacuum conditions: Equilibrium, kinetic and thermodynamic investigations." Chemical Industry and Chemical Engineering Quarterly 18, no. 4-1 (2012): 497–508. http://dx.doi.org/10.2298/ciceq110920027b.

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In this study, the adsorption of HF gas by three types of activated carbon has been investigated under vacuum condition. The effects of experimental parameters such as initial pressure of the HF gas, contact time and temperature on adsorption process have been investigated. The results showed that the adsorption of the HF gas onto activated carbon increased by increasing initial pressure of gas, while it decreased with increase in temperature. The Freundlich isotherm model fitted the equilibrium data better than the other isotherm models. Using Langmuir isotherm model, the maximum adsorption capacities of the first type, the second type and third type of activated carbon were 226.4, 268.8 and 258.9 mg/g, respectively. Experimental data were also evaluated in terms of kinetic characteristics of adsorption and it was found that the adsorption process followed well pseudo-second-order kinetics. Thermodynamic parameters, the change of free energy (?G?), enthalpy (?H?) and entropy (?S?) of adsorption were calculated at the temperature range of 28-55?C. The results showed that the adsorption of HF on activated carbon is feasible, spontaneous and exothermic.
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Khurana, Maninder, and Shamsuzzaman Farooq. "Integrated adsorbent-process optimization for carbon capture and concentration using vacuum swing adsorption cycles." AIChE Journal 63, no. 7 (2017): 2987–95. http://dx.doi.org/10.1002/aic.15602.

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Dutcher, Bryce, Hertanto Adidharma, and Maciej Radosz. "Carbon Filter Process for Flue-Gas Carbon Capture on Carbonaceous Sorbents: Steam-Aided Vacuum Swing Adsorption Option." Industrial & Engineering Chemistry Research 50, no. 16 (2011): 9696–703. http://dx.doi.org/10.1021/ie102522r.

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Dutcher, Bryce, Kaspars Krutkramelis, Hertanto Adidharma, and Maciej Radosz. "Carbon Filter Process for Flue-Gas Carbon Capture on Carbonaceous Sorbents: Field Tests of Steam-Aided Vacuum Swing Adsorption." Energy & Fuels 26, no. 4 (2012): 2539–45. http://dx.doi.org/10.1021/ef3001746.

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Prasetyo, Imam, Nur Indah Fajar Mukti, and Teguh Ariyanto. "Ethylene Adsorption Using Cobalt Oxide-Loaded Polymer-Derived Nanoporous Carbon and Its Application to Extend Shelf Life of Fruit." Molecules 24, no. 8 (2019): 1507. http://dx.doi.org/10.3390/molecules24081507.

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Suppressing the amount of ethylene during storage has been of interest as a method to enhance shelf life of fruit. In this work, ethylene removal by adsorption using cobalt oxide-impregnated nanoporous carbon has been studied. Nanoporous carbon with a high surface area up to 2400 m2 g−1 was prepared by carbonization process biomass and synthetic polymer at 850 °C. Dispersion of cobalt oxide on porous carbon surface was carried out by an incipient wetness procedure followed by calcination process at 200 °C. Ethylene adsorption test was performed using a volumetric method in an ultrahigh vacuum rig constructed by Swagelok VCR® fittings. The results showed that the cobalt oxide/carbon system had significant ethylene adsorption capacity. Ethylene uptake increases with the increasing cobalt oxide loading on the carbon. The highest ethylene capacity of 16 mol kg−1 adsorbent was obtained by using 30 wt.% (weight percentage) of cobalt oxide dispersed in polymer-derived carbon. In closed storage, the ratio of 15 g adsorbent/kg fruit may extend the storage life up to 12 d, higher than that without adsorbent (3 d). Therefore, the results demonstrate the great potential use of cobalt oxide-impregnated nanoporous carbon as an adsorbent for ethylene removal during storage of fruit.
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Akulinin, E. I., O. O. Golubyatnikov, A. N. Labutin, D. S. Dvoretsky, and S. I. Dvoretsky. "MODELING AND ANALYSIS OF DYNAMICS OF PRESSURE SWING ADSORPTION PROCESS FOR SYNTHESIS GAS SEPARATION AND HYDROGEN PRODUCTION." Vestnik Tambovskogo gosudarstvennogo tehnicheskogo universiteta 26, no. 3 (2020): 342–56. http://dx.doi.org/10.17277/vestnik.2020.03.pp.342-356.

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On the basis of the Dubinin theory of micropore volume filling, a mathematical model of dynamics of pressure swing adsorption processes for synthesis gas separation has been developed. The model takes into consideration the influence of the processes of mass and heat transfer in gas and solid phases on the kinetics of diffusion transfer of adsorbate (carbon dioxide, carbon monoxide, hydrogen) in the adsorbent layer and accounts for all devices included in the process diagram (adsorber, compressor, vacuum pump, valves, throttle, receiver). Numerical studies of the process of separation of synthesis gas and concentration of hydrogen in a four-adsorber unit with granulated zeolite adsorbent 13X were carried out by methods of mathematical modeling: the influence of disturbing influences (composition and temperature of the initial hydrogen-containing gas mixture), regime parameters (cycle duration, pressure at the compressor outlet, pressure at the vacuum pump inlet, backflow coefficient) and design parameters (length of the adsorbent bulk layer and inner diameter of the adsorber) on the purity of the product hydrogen, its recovery rate and productivity of the unit were studied. The most dangerous disturbances and the most effective regime parameters of pressure swing adsorption process of synthesis gas separation were determined. It is established that the increase of temperature from 298 to 323 K and decrease of hydrogen concentration from 68 to 48 % (vol.) in initial gas mixture result in ~10 % lower efficiency of the unit due to the decrease of product hydrogen recovery rate. Practical recommendations on effective choice of operation regimes of an adsorption unit to ensure the achievement of required purity of product hydrogen at the level of 99.99 % (vol.), regardless of the impact of disturbances are formulated.
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Zhang, Jinhua, Lanting Li, and Qiang Qin. "Effects of micropore structure of activated carbons on the CH4/N2 adsorption separation and the enrichment of coal-bed methane." Clean Energy 5, no. 2 (2021): 329–38. http://dx.doi.org/10.1093/ce/zkab013.

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Abstract In the process of enriching CH4 from coal-bed methane, the separation of CH4/N2 is very difficult to accomplish by an adsorption process due to the similar physico-chemical properties of the two molecules. A series of coconut-shell-based granular activated carbons (GACs) with different pore structures were prepared, which were characterized by different methods. The influence of the pore structure on the separation properties was investigated in detail. The results show that one of the carbons prepared (GAC-3) has high CH4 equilibrium adsorption capacity (3.28 mol·kg–1) at 298 K and equilibrium separation coefficient (3.95). The CH4/N2 separation on the GACs is controlled by adsorption equilibrium as compared with the dynamic effect. Taking the specific surface area, for example, the common characterization index of the pore structure is not enough to judge the separation performance of the GACs. However, the microstructure of carbon materials plays a decisive role for CH4/N2 separation. According to the pore-structure analysis, the effective pore size for the CH4/N2 separation is from 0.4 to 0.9 nm, with the optimum effect occurring in the range of 0.6–0.7 nm, followed by the range of 0.7~0.9 nm. Also, a four-bed vacuum pressure swing adsorption process was adopted to evaluate the performance of GACs for the separation of CH4 from nitrogen.
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Yuliusman, Mufiid Fatkhurrahman, Fadel Al Farouq, Salma Amaliani Putri, Samson Patar Sipangkar, and Nasruddin. "Modified Activated Carbon Using NiO for Natural Gas Storage." Materials Science Forum 1000 (July 2020): 311–17. http://dx.doi.org/10.4028/www.scientific.net/msf.1000.311.

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The technology of natural gas adsorbed can be called Adsorbed Natural Gas (ANG) technology use porous adsorbents to adsorb natural gas. The material is activated carbon (AC), which has a large specific surface area. Activated carbon made from cassava peel waste because of abundance as agricultural waste in Indonesia. Cassava peel has a high cellulose and lignin content. Cassava peel through the carbonization process with furnace temperature 500 ° C in vacuum condition for 1.5 hours. Then, chemical activation with a different activator agent KOH and NaOH by mass ration (3:1). After that, physic activation with N2 and CO2 gas of 150 mL/minute using temperature muffle furnace 750 ° C. Product of physic activation modified using (Ni (NO3)2). Characterization of activated carbon performed with iodine test, SEM, EDX, adsorption, and desorption testers. The best of activated carbon is activated carbon impregnated KOH and with physic activation at 750 ° C, which has 612 mg / g of iodine number. Then, after activated carbon modified using (Ni (NO3)2) has the best performance with 1% NiO, has 662 mg / g of iodine number, and 657 m2 / g of SBET. Then, activated carbon through adsorption and desorption test by ANG technology has 0.02928 kg/kg of adsorption capacity and 39.17% of desorption percent.
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Akulinin, E. I., O. O. Golubyatnikov, D. S. Dvoretsky, and S. I. Dvoretsky. "Numerical study of the dynamics of synthesis gas adsorption separation." Proceedings of the Voronezh State University of Engineering Technologies 82, no. 1 (2020): 230–36. http://dx.doi.org/10.20914/2310-1202-2020-1-230-236.

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A numerical study of the dynamics of pressure swing adsorption process for synthesis gas separation and hydrogen concentration was carried out. The influence of regime parameters (compressor and vacuum pump outlet pressures, duration of the "adsorption-desorption" cycle, backflow coefficient) and design parameters (height of the adsorbent bulk layer and the internal bed diameter) on the recovery and purity of hydrogen, plant performance in a given range of changes in the temperature, composition and pressure of the initial gas mixture was studied. It is found that when the hydrogen content decreases from 68 to 48 vol. % and a simultaneous increase in the carbon dioxide content in the initial gas mixture from 27 to 47 vol. % required hydrogen purity value at 99.99 vol. % can be achieved by reducing the pressure at the outlet of the vacuum pump from 0.75?105 to 0.5?105 Pa. At the same time, the duration of the adsorption stage increases from 120 to 150 seconds, and the degree of hydrogen extraction decreases from 55 to 52% due to an increase in the proportion of the flow selected for the regeneration of the adsorbent. Increasing the temperature of the initial gas mixture from 293 to 323 K leads to the need to reduce the duration of the adsorption stage from 148 to 42 s due to a decrease in the equilibrium concentrations of carbon dioxide and monoxide in the adsorbent.
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Huang, Qinglin, and Mladen Eić. "Commercial adsorbents as benchmark materials for separation of carbon dioxide and nitrogen by vacuum swing adsorption process." Separation and Purification Technology 103 (January 2013): 203–15. http://dx.doi.org/10.1016/j.seppur.2012.10.040.

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Dissertations / Theses on the topic "Carbon vacuum adsorption process"

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Venter, Cornelia. "Recovery of petrol vapour at a bulk storage facility." Diss., University of Pretoria, 2004. http://hdl.handle.net/2263/23524.

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Beh, Christopher Chun Keong. "Vacuum swing adsorption process for oxygen enrichment : a study into the dynamics, modelling and control." Monash University, Dept. of Chemical Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/9533.

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Gray, Diane Elizabeth. "A quantitative study into carbon-in-pulp adsorption operations." Thesis, Cape Technikon, 1999. http://hdl.handle.net/20.500.11838/886.

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Thesis (MTech (Chemical Engineering))--Cape Technikon, Cape Town, 1999<br>Carbon-in-pulp (CIP) and carbon-in-leach (CIL) remain the most effective, and widely used processes for gold recovery from cyanided pulps. The extensive use of carbon in such processes have prompted many researchers to investigate the mechanism of metal cyanide adsorption. Not only has this provided many viable theories in the understanding of the mechanism, but it has also led to an improved understanding of the effects of the various operating conditions on the CIP circuit. However, the declining gold price has made gold producers aware of the need to either further optimise existing circuits or find alternative means of operation so as to improve efficiency. It is therefore the aim of this study to investigate the factors which influence the metal extraction circuit. In this study the effects of parameters such as gold and carbon concentrations, slurry density and stirring speed on the adsorption process were investigated. It was found that the effects of gold and carbon concentrations could be determined directly, that is, a definite linear relationship exists between these two parameters and adsorption rate. However, slurry density and stirring speed (power input) have a twofold effect on the process. For this reason two distinct terms called the "blinding" and "mixing" numbers have been identified. It has been shown that all the parameters investigated influences the rate of adsorption during the constant rate adsorption period. However, only solution concentration, carbon concentration and carbon loading influence the process during the diminishing rate of adsorption. This confirmed the belief that intraparticle diffusion is the rate controlling factor during the diminishing rate period. Furthermore, the point at which constant rate adsorption is replaced by the diminishing rate of adsorption is mainly a function of solution concentration.
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Burnett, Hannelene Jo-Anne. "Equilibrium shift of gold adsorption in a batch reactor." Thesis, Cape Technikon, 2001. http://hdl.handle.net/20.500.11838/881.

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Thesis (MTech(Chemical engineering))--Cape Technikon, Cape Town, 2001<br>Over the years the carbon-in-pulp technology has been refined to become the highly efficient process that is used in our present-day system of recovering dissolved gold from cyanide leached pulps. The efficiency of a CIP circuit mainly depends on the effectiveness ofthe adsorption section as it not only determines the amount of soluble gold lost in the residues, but also indirectly affects the function of the other processes in the plant. Research in this area has declined over the past few years as a result of a decrease in the gold price. It is now more than ever important to investigate the operating conditions ofthe adsorption process to ensure that a highly effective system is maintained.The adsorption of gold cyanide onto activated carbon is to a large extent dependent on maintaining operating conditions well above those of equilibrium. The Freundlich and the Langmuir isotherms have been used by many researchers to describe the equilibrium conditions of the adsorption process. The general practice in the carbonin- pulp technology is to use an isotherm for the prediction of a circuit's performance. As confidence has increased in the reliability of these predictions, it has become important to acquire knowledge of the equilibrium condition that is driving the process. Previous research findings have indicated that the equilibrium isotherm of gold cyanide adsorption onto activated carbon is influenced by changes in the adsorption conditions down the adsorption train. This equilibrium or isotherm shift may lead to errors in the prediction of gold adsorption rates, which results in the filct that the simulations of the performance of the CIP circuits are not reliable. In this study the aim was to investigate the combined influence of various operating conditions on the adsorption equilibrium
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Yeh, Ruth Yu-Li. "Treatment of dye wastewaters by adsorption with and without the bio-oxidation process." Thesis, University of South Wales, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295273.

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Gertenbach, Rosalind May. "Methane and carbon dioxide sorption studies on South African coals." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1919.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2009.<br>Sequestration of carbon dioxide, CO2, has received large interest as a viable option for mitigating the high atmospheric concentrations of this greenhouse gas. Each year 25 gigatons of anthropogenic CO2 (7.3 GtC/yr) are released into the earth’s atmosphere with the combustion of fossil fuels being the major contributing source. Research in the field of sequestration technology involves evaluating various geological structures as possible reservoirs, determining adsorption capacities of natural formations and developing methods for carbon dioxide injection and the monitoring thereof. Identified potential CO2 reservoirs for geological carbon sequestration (GCS) include saline formations, depleted oil and gas fields and deep coal seams. Carbon dioxide sequestration in coal seams provides the economic opportunity of enhanced coalbed methane (CH4) recovery (ECBM). In South Africa, some coal seams are considered a viable option for long term CO2 sequestration projects as they are abundant and closely situated to South Africa’s largest concentrated CO2 point sources. Many studies have been conducted to determine the sorption capacities for methane and carbon dioxide gases on various coals from around the world; however, similar data have not been recorded for South African coals. The objectives of this study are to determine the adsorption capacities for methane and carbon dioxide of three South African coals over a pressure range of 0 – 50 bar. In the study, single-component gas adsorption experiments were conducted and the absolute adsorption capacities are reported. Isothermal adsorption experiments were conducted using both the volumetric and gravimetric methods with the volumetric apparatus pressure range extending up to 50 bar and the gravimetric apparatus up to 20 bar. Carbon dioxide adsorption capacities are much higher than the methane adsorption capacities, which are expected. Gravimetric experiments produce greater adsorption capacities than the volumetric method. However, the relative CO2/CH4 ratios for each coal, as well as the relative CO2/CO2 ratios between coals, remain almost identical. The difference in adsorption capacity is attributed to the strength of the vacuum pump used on each apparatus. The gravimetric apparatus makes use of a much stronger vacuum pump which can thus evacuate the coal pores more adequately than in the volumetric apparatus. The methane and carbon dioxide adsorption capacities of the three moisture-free coals compare well with literature data. The adsorption isotherms fit conventional adsorption models (the Langmuir and Freundlich adsorption equations) extremely well thus indicating that monolayer adsorption takes place. Since no internationally recognised testing standards are in place regarding adsorption procedures on coal, it is very difficult to compare adsorption results presented in the literature. Respective researchers determine their own experimental conditions for the many variables in coal adsorption studies. It is recommended that international testing standards be set in place to make coal research comparable. Such efforts would aid the development of a coal adsorption database, another recommendation, which would advance sequestration technology exchange and eliminate duplication of research efforts. The objectives of the project were achieved by determining the absolute adsorption capacities for carbon dioxide and methane gas of the three South African coals within a pressure range of 0 – 50 bar. Further work is required to investigate adsorption capacities of South African coals under supercritical conditions (above 73 bar abs and 31.1 oC).
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Charalambous, Charithea. "Temperature swing adsorption process for carbon dioxide capture, purification and compression directly from atmospheric air." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33311.

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Many reports, scientific papers, patents, and scientific news investigate the feasibility and affordability of direct carbon dioxide capture from the atmospheric air (DAC). Since carbon dioxide (CO2) is extremely diluted in the atmosphere, large volumes of air have to be handled to capture comparable amounts of CO2. Therefore, both the energy consumption and the plant size are expected to be 'prohibitive'. On the other hand, some analyses have shown that DAC is feasible and can become affordable with essential research and development. DAC has been regarded as an optional bridging or a transitional technology for mitigating CO2 emissions in the medium-term. Priorities include investing in renewable and low-carbon technologies, efficiency and integration of energy systems, and realisation of additional environmental benefits. A heavy reliance on negative emission technologies (NETs), and consequently DAC, may be extremely risky as NETs interact with a number of societal challenges, i.e. food, land, water and energy security. Although, "... capturing carbon from thin air may turn out to be our last line of defence, if climate change is as bad as the climate scientists say, and if humanity fails to take the cheaper and more sensible option that may still be available today" MacKay (2009). Certainly, more research is necessary to bring down both cost and energy requirements for DAC. This work firstly predicts the adsorption equilibrium behaviour of a novel temperature swing adsorption process, which captures carbon dioxide directly from the air, concentrates, and purifies it at levels compatible to geological storage. The process consists of an adsorption air contactor, a compression and purification train, which is a series of packed beds reduced in size and connected in-line for the compression and purification purposes, and a final storage bed. The in-line beds undergo subsequent adsorption and desorption states. The final desorbed stream is stored in a storage bed. This cyclic process is repeated for a number of times imposed by the required purity and pressure in the final bed. The process is been thermodynamically verified and optimised. Since, the overall performance of this process does not only depend on the design of the process cycle and operating conditions but also on the chosen adsorbent material, further optimisation of the adsorptive and physical properties of the solid adsorbent is investigated. Thus, the optimal parameters of the potentially used porous materials is identified. Continuing the research on different adsorbent materials, an experimental investigation on the equilibrium properties of two competitive adsorbents is also performed. Besides the thermodynamic analysis, a dynamic model is presented for the investigation of the mass and heat transfer and its influence on the adsorption rate and consequently on the overall process performance. Since the initial stream is very dilute, it is expected that the adsorption rate will be low compared to other temperature swing processes and the capture rate will be affected by the heat transfer. Finally, the design and development of an experimental laboratory-scale apparatus is presented and analysed. Future design improvements are also discussed.
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Yan, Liang. "Tailoring of the activation process of carbonaceous adsorbentsfor improving their adsorption effectiveness." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1396524230.

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Ohlin, Lindsay. "Adsorption of water, carbon dioxide and methane in zeolite ZSM-5 studied using in-situ ATR-FTIR spectroscopy." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17956.

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Global warming is believed to be caused by the extensive emission of greenhouse gases, such as carbon dioxide, into the atmosphere by combustion of fossil fuels, such as coal, oil and natural gas.To reduce the emission of carbon dioxide and hence avoid global warming, alternative fuels derived from renewable resources are desired. Another reason for the worldwide interest in finding alternative fuels is that the reserves of the fossile fuels are limited and the oil and gas resources will eventually run out.Biogas and natural gas are interesting alternatives with no or at least reduced emission of fossil carbon dioxide to the atmosphere as compared to coal and oil. Both gases mainly consist of methane (60–95%) but may also contain a large fraction of carbon dioxide and water. Removal of carbon dioxide and water from biogas and natural gas is of great importance mainly to lower the transportation costs and to increase the heat value of the gas. The most commonly used separation technique is amine absorption. This is an expensive and complex process and alternative techniques are desired. Zeolites are an interesting alternative due to their great potential both as selective adsorbents and membranes. Due to the unique pore structure zeolites are capable of separating species in a mixture based on the molecule size and adsorption properties. Since water, carbon dioxide and methane all have a molecular size smaller than the pore size of the zeolite ZSM-5 studied in the present work, the molecules can enter and adsorb in the pores and hence the separation is based on adsorption rather than size.In the present work, the single component adsorption of water, carbon dioxide and methane in zeolite ZSM-5 was studied using in-situ Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectroscopy and the method was successfully further used to study multicomponent adsorption in zeolites.For single gas adsorption experiments, recorded infrared spectra of adsorbed water, carbon dioxide and methane showed characteristic well separated bands for each gas. Adsorbed concentrations of water, carbon dioxide and methane were determined from the recorded infrared spectra. For single gas experiments, the Langmuir model was fitted to the adsorption isotherms and the model matched the experimental data very well. The fitted Langmuir parameters obtained in the present work showed good agreement with values reported in the literature.For multicomponent adsorption experiments, the Ideal Adsorbed Solution Theory (IAST) was used to predict the adsorbed concentrations of water, carbon dioxide and methane using the single component adsorption isotherm parameters as input. The IAST accurately predicted the adsorbed concentrations of both carbon dioxide and methane when adsorbed from binary mixtures. Internary mixtures, also including water, the IAST accurately predicted the adsorbed concentration of methane, however it severely underestimated the adsorbed concentration of carbon dioxide.The latter is probably an effect of a non-ideal behavior of carbon dioxide in the presence of water.The CO2/CH4 adsorption selectivity was determined for various gas compositions and temperatures showing a general increase in the selectivity with decreasing temperature, which is related to the higher heat of adsorption of carbon dioxide. This indicates that the separation of carbon dioxide from biogas and natural gas should be more efficient at lower temperatures. Compared to the literature, the selectivity observed in the present work is relatively high indicating that low silica Na-ZSN-5 may be an effective membrane material.<br>Godkänd; 2013; 20130308 (andbra); Tillkännagivande licentiatseminarium 2013-04-04 Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Lindsay Ohlin Ämne: Kemisk teknologi/Chemical Technology Uppsats: Adsorption of Water, Carbon Dioxide and Methane in Zeolite ZSM-5 Studied Using in-situ ATR-FTIR Spectroscopy Examinator: Bitr professor Mattias Grahn, Institutionen för samhällsbyggnad och naturresurser, Luleå tekniska universitet Diskutant: Researcher Zoltán Bacsik, Institutionen för material- och miljökemi, Stockholms universitet Tid: Fredag den 26 april 2013 kl 10.30 Plats: F531, Luleå tekniska universitet
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Dastoli, Giovanni. "Mass Transfer in Nitrogen Pressure Swing Adsorption Plants: a Custom Model Based on Aspen Adsorption." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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In this work, a dynamic mathematical model was developed for the simulation of the pressure swing adsorption process (PSA), through the Aspen Adsorption software for the purpose of validation, optimisation, and control of the nitrogen generation in the PSA pilot plant located at the Fachhochschule Münster (Münster University of Applied Sciences), Faculty of Chemical Engineering - Steinfurt. The mathematical model for the description of the transport phenomena developed within the packed column filled by adsorbent material (CMS) was formulated through the application of several assumptions in the mass/momentum and energy balances, in order to generate inside the software a correct set of partial differential equations. Simulation studies were performed to investigate the effect of changing various process variables such as the duration of PSA cycle time, the heat effect, and pressure drop, in order to achieve higher purity (up to 10 ppm of residual oxygen). A comparison between simulation results of a dynamic model and experimental results were carried out to evaluate selected assumptions. The outcome showed that the model is reliable in some purity intervals while it is not entirely satisfactory when high purity is required (99.999 % nitrogen) because data for a detailed description of kinetics or transport phenomena are missing. Other possible reasons and future improvements were discussed at the end of this work.
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Books on the topic "Carbon vacuum adsorption process"

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Fairchild, Erik. Air stripping and carbon adsorption annotated bibliography: Treatment of contaminated ground water. Washington State Dept. of Ecology, 1988.

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Sheya, S. A. N. Effect of metal impurities on the adsorption of gold by activated carbon in cyanide solutions. U.S. Dept. of the Interior, Bureau of Mines, 1989.

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Sheya, S. A. N. Effect of metal impurities on the adsorption of gold by activated carbon in cyanide solutions. Dept. of the Interior, 1989.

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Book chapters on the topic "Carbon vacuum adsorption process"

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Kouyoumdjiev, M. S., M. A. G. Vorstman, and P. J. A. M. Kerkhof. "Single and Multicomponent Adsorption from Liquid Phase on Activated Carbon in a Finite Bath Process." In Precision Process Technology. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1759-3_18.

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Sato, Masaki, Motonobu Goto, and Tsutomu Hirose. "Adsorption Process for the Fractionation of Citrus Oil by Supercritical Carbon Dioxide." In The Kluwer International Series in Engineering and Computer Science. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1375-5_99.

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Marzougui, Zied, Mohamed Damak, Leila Chaari, Sana Ghrab, Abdelhamid Elaissari, and Boubaker Elleuch. "Iron Removal from Groundwater by Adsorption Process onto Activated Carbon Obtained from Pinus Halepensis Cone Wastes." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions (2nd Edition). Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51210-1_3.

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Bokil, Shantini A., Niraj S. Topare, and Satish V. Khedkar. "A Study of Process Parameters for Adsorption of Textile Industry Wastewater Using Low-Cost Adsorbent (Bamboo Activated Carbon)." In Techno-Societal 2020. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69925-3_83.

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Leperi, Karson T., Randall Q. Snurr, and Fengqi You. "Optimization of Pressure/Vacuum Swing Adsorption with Variable Dehydration Levels for Post Combustion Carbon Capture." In 12th International Symposium on Process Systems Engineering and 25th European Symposium on Computer Aided Process Engineering. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-444-63576-1.50102-3.

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Bilello, L. J., and P. B. DeJohn. "Total Process Design and Economics." In Activated Carbon Adsorption for Wastewater Treatment. CRC Press, 2018. http://dx.doi.org/10.1201/9781351069465-9.

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Fathy Mubarak, Mahmoud, Alshimaa Maher Ahmed, and Sahar saad Gabr. "Nanoporous Carbon Materials toward Phenolic Compounds Adsorption." In Nanopores [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96380.

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Nanoporous carbon-based sorbents are used to generate a three-dimensional real-space model of the nanoporous structure using the concept of Gaussian random fields. This pore model is used to derive important pore size characteristics, which are cross-validated against the corresponding values from gas sorption analysis. After filling the model pore structure with an aqueous electrolyte and rearranging the ions via a Monte Carlo simulation for different applied adsorption potentials. In comparison to nanopores formed from solid-state membranes (e.g., silicon oxide, aluminum oxide, polymer membranes, glass, hafnium oxide, gold, etc.) and very recently 2D materials (e.g., boron nitride, molybdenum disulfide, etc.), those nanopores produced from carbon materials (e.g., graphene, carbon nanotubes (CNTs), diamond, etc.), especially those from graphene appear to be perfect for adsorption process. The thickness of carbon structures nanopores can be as thin as 0.35 nm, resembling the height of the base spacing. Moreover, the sizes of carbon structures nanopores can be precisely fabricated and tuned to around 1.0 nm, the similar size of many heavy metals and organic pollutants molecules. Furthermore, carbon materials are chemically stable and feature-rich surface chemistry. Therefore, various carbon nanopore sequencing techniques have been developed. Finally, in this chapter the adsorption of phenolic compounds on nanoporous carbon specifically the active carbon are overviewed and how to affect the heterogeneity of activated carbon surface, PH of the solution on the efficiency of adsorption.
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Pick, P., and M. Obš;il. "The influence of water vapor on the organic compounds adsorption on activated carbon." In Characterization and Control of Odours and VOC in the Process Industries, Proceedings of the Second International Symposium on Characterization and Control of Odours and VOC in the Process Industries. Elsevier, 1994. http://dx.doi.org/10.1016/s0166-1116(08)72065-x.

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Fessmann, J., D. Mann, G. Kampschulte, et al. "Adherent metallization of carbon-fibre-reinforced plastic composites using a combined vacuum/electrochemical deposition process." In Metallurgical Coatings and Thin Films 1992. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89900-2.50107-x.

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Nikolaidis, George N., Eustathios S. Kikkinides, and Michael C. Georgiadis. "Modelling and Simulation of Pressure Swing Adsorption (PSA) Processes for post-combustion Carbon Dioxide (CO2) capture from flue gas." In 12th International Symposium on Process Systems Engineering and 25th European Symposium on Computer Aided Process Engineering. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-444-63578-5.50043-8.

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Conference papers on the topic "Carbon vacuum adsorption process"

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Moroizumi, Hiroyuki, Shohei Chiashi, Yasuyuki Takata, and Masamichi Kohno. "Water Molecule Adsorption on Vertically Aligned Single-Walled Carbon Nanotubes." In ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icnmm2014-21468.

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A single walled carbon nanotube, which adsorbed water molecule in its nano channel, was observed using Raman spectroscopy, and two samples’ spectrums were compared under the same conditions. The SWNT samples that were vertically aligned on the silicon substrate were used. One of the samples was not covered by polymer whereas the other sample was covered by polymer. In our experiment, a nano channel was made using a nanosecond pulse laser (Nd:YAG laser). In order to adjust the focus, the sample was set on the automatic stage and controlled on the PC using a USB camera to watch closely. By moving the stage for over 30 seconds, the sample was processed to make the nano channel. The cell with the laser-processed sample in it was set on the Raman spectroscopy’s platform. Then, the cell was connected to the vacuum chamber and erlenmeyer flask by the valve. Both of the valves were opened first and left for a while to make the cell vacuum. Second, the vacuum chamber’s valve was closed and left for a while to let water molecule spread in the cell. Finally, the SWNT successfully adsorbed water molecule in its nano channel. Ar-ion laser was used in the Raman spectroscopy and the laser wavelength is 488nm. With the Raman spectroscopy, Radial Breathing Mode (RBM), D-band, and G-band were mainly observed. The RBM, D-band, and G-band originated from radial vibration frequency, defective structure, and graphite structure respectively. According to the sample types, the RBM spectrums were compared in our experiment.
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Du, Wenli, and Khalil Abdulghani Mutahar Alkebsi. "Model predictive control and optimization of vacuum pressure swing adsorption for carbon dioxide capture." In 2017 6th International Symposium on Advanced Control of Industrial Processes (AdCONIP). IEEE, 2017. http://dx.doi.org/10.1109/adconip.2017.7983816.

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Yun, Yang, and Andrew J. Gellman. "Vapor Phase Lubricant Adsorption on Magnetic Data Storage Media." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64341.

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Vapor phase lubrication (VPL) integrates media lubrication with the vacuum processing steps used throughout most of the hard disk media fabrication process. This avoids exposure of the unlubricated hydrogenated amorphous carbon (a-CHx) overcoat to the ambient air and airborne contamination. In vapor lubrication the a-CHx surface can be oxidized under controlled conditions immediately prior to lubricant adsorption. The interaction between lubricants and a-CHx films can be tailored by controlled oxidation of the a-CHx in vapor phase lubrication.
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Heben, Michael J. "Assessing The Hydrogen Adsorption Capacity Of Single-Wall Carbon Nanotube / Metal Composites." In HYDROGEN IN MATERIALS & VACUUM SYSTEMS: First International Workshop on Hydrogen in Materials and Vacuum Systems. AIP, 2003. http://dx.doi.org/10.1063/1.1597359.

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Muryeti, Estuti Budimulyani, and Ellya Sinurat. "Adsorption of carbon black using carboxymethyl chitosan in deinking process." In PROCEEDINGS FROM THE 14TH INTERNATIONAL SYMPOSIUM ON THERAPEUTIC ULTRASOUND. Author(s), 2017. http://dx.doi.org/10.1063/1.4978111.

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Macron, J., O. Roy, J. Pierquin, and P. Rouchon. "Purity predictive model-based control of oxygen vacuum swing adsorption process." In Automation (MED 2010). IEEE, 2010. http://dx.doi.org/10.1109/med.2010.5547782.

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BEH, C., S. WILSON, P. WEBLEY, and J. HE. "THE CONTROL OF THE VACUUM SWING ADSORPTION PROCESS FOR AIR SEPARATION." In Proceedings of the Second Pacific Basin Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793331_0132.

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Kay, Robert J., and Allen K. MacKnight. "Critical Factor Identification for Vacuum Regenerated Carbon Dioxide and Water Vapor Adsorption Beds." In International Conference On Environmental Systems. SAE International, 2006. http://dx.doi.org/10.4271/2006-01-2196.

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Jiang, Wenxin, Guangyu Zhang, and Weichi Ying. "Enhanced Carbon Adsorption Process for Advanced Treatment of Biotreated Coking Plant Wastewater." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517149.

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Kamaletdinova, Guzel R., Sergey A. Skvortsov, Maxim P. Onevsky, Alexander A. Tret'yakov, and Alexander N. Pchelintsev. "Mathematical Model for Calculation of Process of Chemisorption Adsorption of Carbon Dioxide." In International Conference "Actual Issues of Mechanical Engineering" 2017 (AIME 2017). Atlantis Press, 2017. http://dx.doi.org/10.2991/aime-17.2017.97.

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