Relevant bibliographies by topics / Entrained bed reactor

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Entrained bed reactor'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Entrained bed reactor"

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Li, Zhi He, Wei Ming Yi, Qiao Chun Gao, Yong Jun Li, Xue Yuan Bai, and De Li Zhang. "Research on Pyrolysis Reactors for Bio-Oil Production from Agricultural Residues." Advanced Materials Research 512-515 (May 2012): 459–63. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.459.

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This paper provides an updated review on fast biomass pyrolysis reactors for bio-oil production in Shandong University of Technology. The technologies that were developed include horizontal entrained bed (HEB), fluidized bed (FB), down flow tuber reactor (DFTR), double concentric cylinder rotary reactor (DCCRR) and new type down flow tube reactor (N-DFTR). The patented DFTR, DCCRR and N-DFTR in China were developed based on the technology of direct heat exchange between hot solid heat carriers and biomass particles during both of the particles flowing in a mixed condition. The process and characteristics of each reactor were discussed in this topic. Contrasting to conventional reactors, the DFTR, DCCRR and N-DFTR are promising technologies due to their characteristics of high solid-liquid conversion rate, energy self-sufficient, easy operation and scaling up.
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OHTA, Yoshihiko, Hiroshi DEMIZU, Shoji FUKUNAGA, Yoshihiko NINOMIYA, and Mizuho HIRATO. "Behavior of Char Particles in a Laboratory-scale Entrained Bed Reactor." Journal of the Japan Institute of Energy 71, no. 11 (1992): 1118–24. http://dx.doi.org/10.3775/jie.71.1118.

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Uemura, Yoshimitsu, Sumio Nezu, Hidetaka Honda, Yoshihiro Ohzuno, Kazuya Ijichi, and Yasuo Hatate. "Inorganic microballoon production from shinju-gan using an entrained bed reactor." Korean Journal of Chemical Engineering 16, no. 6 (November 1999): 837–39. http://dx.doi.org/10.1007/bf02698361.

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Butler, D., Y. Xiao, S. H. P. G. Karunaratne, and S. Thedchanamoorthy. "The gully pot as a physical, chemical and biological reactor." Water Science and Technology 31, no. 7 (April 1, 1995): 219–28. http://dx.doi.org/10.2166/wst.1995.0237.

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The gully pot operates under two distinct regimes: dry weather and wet weather. During dry weather, rapid drops in dissolved oxygen concentration result in the establishment of anaerobic conditions. This leads to the release of oxygen demanding soluble organics, ammonium and possibly sulphides. Complex changes also occur to the phase and bio-availability of a range of heavy metals. Concurrently, some material previously held in suspension in the inflow settles to the base of the pot to form a bed whilst significant amounts of smaller material remain in suspension. The bed formed under the liquor seems to undergo an aging process. In wet weather, incoming runoff rapidly displaces the standing liquor, which can represent a significant fraction of the total flow volume and pollutant load contributing to a first foul flush. The solids trapping efficiency of the pot is high for larger particles, but poor for smaller particles which carry proportionately more of the pollutant load. Organics and smaller solids can be re-entrained, but there is little evidence of large-scale overturning of the bed.
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Chen, Ming-Hong, Yau-Pin Chyou, and Ting Wang. "Simulation of Coal Gasification in a Low-Temperature, High-Pressure Entrained-Bed Reactor with a Volatiles Condensation and Re-Evaporation Model." Applied Sciences 9, no. 3 (February 1, 2019): 510. http://dx.doi.org/10.3390/app9030510.

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The objective of this study is to implement a tar condensation and re-vaporization sub-model in a previously established Computational Fluid Dynamics (CFD) model for the Entrained Slagging Transport Reactor (E-STR) gasifier, modified from the existing E-Gasifier simulation models in previous studies. The major modifications in E-STR, compared to the existing E-GasTM design, include higher operating pressure and lower temperature, with the aim of achieving a higher H2/CO ratio of syngas, which is more favorable for synthetic natural gas (SNG) production. In this study, the aforementioned sub-model is described by the UDF (User-Defined Function) and incorporated in a previously developed computational model for entrained-flow gasification process, to study the syngas composition without implementing a tars-cracking catalyst in the E-STR gasifier. The results show that incorporating the tar condensation model leads to a formation of approximately 6.47% liquid volatiles and an exit temperature increase about 135 K, due to the release of latent heat. These sub-models have been successfully implemented and will be useful in the condition that the gasifier temperature is intentionally kept low, just as the E-STR gasifier. The results indicate that high pressure and less oxygen feed produce a higher H2/CO ratio, more favorable for SNG production.
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Liang, Dingcheng, Qiang Xie, Chaoran Wan, Guangsheng Li, and Junya Cao. "Evolution of structural and surface chemistry during pyrolysis of Zhundong coal in an entrained-flow bed reactor." Journal of Analytical and Applied Pyrolysis 140 (June 2019): 331–38. http://dx.doi.org/10.1016/j.jaap.2019.04.010.

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Everaert, Kim, Jan Baeyens, and Claude Creemers. "Adsorption of dioxins and furans from flue gases in an entrained flow or fixed/moving bed reactor." Journal of Chemical Technology & Biotechnology 78, no. 2-3 (2003): 213–19. http://dx.doi.org/10.1002/jctb.752.

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Liang, Dingcheng, Qiang Xie, Zheng Wei, Chaoran Wan, Guangsheng Li, and Junya Cao. "Transformation of alkali and alkaline earth metals in Zhundong coal during pyrolysis in an entrained flow bed reactor." Journal of Analytical and Applied Pyrolysis 142 (September 2019): 104661. http://dx.doi.org/10.1016/j.jaap.2019.104661.

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Cui, Lijie, Wenli Song, Jiayuan Zhang, Jianzhong Yao, and Weigang Lin. "Influence of the Gas and Particle Residence Time on Fast Pyrolysis of Lignite." Journal of Energy Resources Technology 129, no. 2 (July 19, 2006): 152–58. http://dx.doi.org/10.1115/1.2719208.

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Coal resource is abundant in China, while the reserves of natural gas and petroleum are limited. Due to the rapid increase in the number of automobiles, a competitive way to produce liquid fuels from coal is urgently needed in China. A so-called “coal topping process” is under development at the Institute of Process Engineering, Chinese Academy of Sciences, from which liquid products can be obtained by flash pyrolysis in an integrated circulating fluidized bed system. In order to achieve a high yield of liquid products from high volatile coal, controlling the residence time of coal particles and produced gas may be of importance for minimizing the degree of the secondary reactions; i.e., polymerization and cracking of the liquid products. Experiments of the flash pyrolysis of coal have been conducted in an entrained bed reactor, which is especially designed to study the influence of the coal particle residence time on the product distribution. The results show that the gaseous, liquid, and solid product distribution, the gas compositions as well as the liquid compositions depend strongly on the gas and particle residence time.
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Chen, Zhiyuan, Suping Zhang, Zhenqi Chen, and Ding Ding. "An integrated process for hydrogen-rich gas production from cotton stalks: The simultaneous gasification of pyrolysis gases and char in an entrained flow bed reactor." Bioresource Technology 198 (December 2015): 586–92. http://dx.doi.org/10.1016/j.biortech.2015.09.015.

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Dissertations / Theses on the topic "Entrained bed reactor"

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Meillot, Erick. "Contribution a l'etude d'un plasma d'arc de vapeur d'eau : application a la gazeification de charbon pulverise en plasma d'arc." Toulouse 3, 1988. http://www.theses.fr/1988TOU30030.

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On presente le developpement d'un prototype preindustriel d'une torche a plasma d'arc de vapeur d'eau. Calcul des proprietes thermodynamiques (composition chimique, enthalpie massique, chaleur specifique) du systeme ar/h::(2)o, a pression constante, entre 700 et 15000 k. On presente les evolutions des coefficients de transport du systeme ar/h::(2)o en fonction de la temperature. La thermolyse de l'eau est abordee a l'aide d'un modele numerique. Dimensionnement d'un reacteur plasma pour la synthese de gaz produit sont calcules pour differents types de charbon. Modele numerique de simulation de la gazeification de charbon pulverise dans un reacteur a lit entraine avec prise en compte de la granulometrie
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Tia-BinWu and 吳泰斌. "Numerical Simulation Analyses of an Entrained-bed Gasifier Using a CFD Model Coupled with Chemical Reaction Kinetics." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/25705379325329408673.

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Book chapters on the topic "Entrained bed reactor"

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Ouarzki, Imane, Aissa Ould Dris, and Mourad Hazi. "Production of Bio-Oil for Chemical Valorization by Flash Pyrolysis of Lignocellulosic Biomass in an Entrained Bed Reactor." In Springer Proceedings in Energy, 395–403. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6595-3_51.

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Conference papers on the topic "Entrained bed reactor"

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Cui, Lijie, Jianzhong Yao, Weigang Lin, and Zheng Zhang. "Product Distribution From Flash Pyrolysis of Coal in a Fast Fluidized Bed." In 17th International Conference on Fluidized Bed Combustion. ASMEDC, 2003. http://dx.doi.org/10.1115/fbc2003-122.

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The flash pyrolysis of Huolinhe coal was carried out in a fast-entrained bed reactor. The investigation focuses on the effects of pyrolysis temperature and particle size on pyrolysis product distributions and gas and liquid compositions. Increasing temperature results in an increase of the gaseous product. There is an optimum temperature on the maximum liquid yield, which is around 650°C. An increase in particle size leads to a decrease of liquid products. Some amount of phenol group was found in the liquid products, which may produce the chemicals with high value. The results provide fundamental data and optimal conditions to maximize light oils yields for the coal topping process.
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Theis, Mischa, Bengt-Johan Skrifvars, Mikko Hupa, and Honghi Tran. "Fouling Tendency of Ash Resulting From Burning Mixtures of Biofuels." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78019.

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Specified mixtures of peat with bark and peat with straw were burned in a lab-scale entrained flow reactor that simulates conditions in the superheater region of a biomass-fired boiler. Deposits were collected on an air-cooled probe that was inserted into the reactor at the outlet. For both mixtures, the deposition behaviour followed a non-linear pattern, which suggests that physico-chemical interaction between the ashes of the different fuels has taken place. The results indicate that it is possible to burn up to 30 wt-% bark (renewable biofuel and pulp mill waste) and up to 70 wt-% straw (renewable biofuel and agricultural waste) in mixtures with peat without encountering increased deposition rates in the reactor. The deposit composition was compared to the fuel ash composition using chemical fractionation analysis and SEM/EDX. While the composition of deposits obtained from pure fuels resembles the feed composition, a considerable change is observed in deposits obtained from mixtures. K and S compounds are attached to Si spheres and the substrate surface. The deposition rate is significantly lowered when removing K, S, Cl and Na in bark prior to burning by washing and mechanical/thermal dewatering.
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Shi, Shaoping, Christopher Guenther, and Stefano Orsino. "Numerical Study of Coal Gasification Using Eulerian-Eulerian Multiphase Model." In ASME 2007 Power Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/power2007-22144.

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Gasification converts the carbon-containing material into a synthesis gas (syngas) which can be used as a fuel to generate electricity or used as a basic chemical building block for a large number of uses in the petrochemical and refining industries. Based on the mode of conveyance of the fuel and the gasifying medium, gasification can be classified into fixed or moving bed, fluidized bed, and entrained flow reactors. Entrained flow gasifiers normally feature dilute flow with small particle size and can be successfully modeled with the Discrete Phase Method (DPM). For the other types, the Eulerian-Eulerian (E-E) or the so called two-fluid multiphase model is a more appropriate approach. The E-E model treats the solid phase as a distinct interpenetrating granular “fluid” and it is the most general-purposed multi-fluid model. This approach provides transient, three-dimensional, detailed information inside the reactor which would otherwise be unobtainable through experiments due to the large scale, high pressure and/or temperature. In this paper, a transient, three-dimensional model of the Power Systems Development Facility (PSDF) transport gasifier will be presented to illustrate how Computational Fluid Dynamics (CFD) can be used for large-scale complicated geometry with detailed physics and chemistry. In the model, eleven species are included in the gas phase while four pseudo-species are assumed in the solid phase. A total of sixteen reactions, both homogeneous (involving only gas phase species) and heterogeneous (involving species in both gas and solid phases), are used to model the coal gasification chemistry. Computational results have been validated against PSDF experimental data from lignite to bituminous coals under both air and oxygen blown conditions. The PSDF gasifier geometry was meshed with about 70,000, hexahedra-dominated cells. A total of six cases with different coal, feed gas, and/or operation conditions have been performed. The predicted and measured temperature profiles along the gasifier and gas compositions at the outlet agreed fairly well.
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Wang, Xun, and Yunhan Xiao. "Predicting the Performance of System for the Co-Production of Fischer-Tropsch Synthetic Liquid and Power From Coal." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27693.

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A co-production system based on FT synthesis reactor and gas turbine was simulated and analyzed. Syngas from entrained bed coal gasification was used as feedstock of low temperature slurry phase Fischer-Tropsch reactor. Raw synthetic liquid produced was fractioned and upgraded to diesel, gasoline and LPG. Tail gas composed of unconverted syngas and F-T light component was fed to gas turbine. Supplemental fuel (NG, or refinery mine gas) might be necessary, which was dependent on gas turbine capacity, expander through flow capacity, etc. FT yield information was important to the simulation of this co-production system. A correlation model based on Mobil’s two step pilot plant was applied. This model proposed triple chain-length-dependent chain growth factors and set up correlations among reaction temperature with wax yield, methane yield, and C2-C22 paraffin and olefin yields. Oxygenates in hydrocarbon phase, water phase and vapor phase were also correlated with methane yield. It was suitable for syngas, iron catalyst and slurry bed. It can show the effect of temperature on products’ selectivity and distribution. Deviations of C5+ components yields and distributions with reference data were less than 3%. To light gas components were less than 2%. User models available to predict product yields, distributions, cooperate with other units and do sensitive studies were embedded into Aspen plus simulation. Performance prediction of syngas fired gas turbine was the other key of this system. The increase in mass flow through the turbine affects the match between compressor and turbine operating conditions. The calculation was carried out by GS software developed by Politecnico Di Milano and Princeton University. The simulated performance assumed that the expander operates under choked conditions and turbine inlet temperature equals to NG fired gas turbine. A “F” technology gas turbine was selected to generate power. Various cases were investigated so as to match FT synthesis island, power island and gasification island in co-production systems. Effects of CO2 removal/LPG recovery, co-firing, CH4 content variation were studied. Simulation results indicated that more than 50% of input energy was converted to electricity and FT products. Total yield of gasoline, diesel and LPG was 136g-155g/NM3(CO+H2). At coal feed 21.9kg/s, net electricity exported to grid was higher than 100MW. Total production of diesel and gasoline (and LPG) was 118,000 tons(134,000tons)/Year. Under economic analysis conditions assumed in this paper, co-production system was economic feasible. The after tax profits can research 17 million EURO. Payback times were ranged from 6-7 years.
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Mazumder, A. K. M. Monayem, Ting Wang, and Jobaidur R. Khan. "Design and Simulation of a Hybrid Entrained-Flow and Fluidized Bed Mild Gasifier: Part 1—Design Considerations and Development of a Multiphase Model." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64473.

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A mild gasification process has been developed to provide an innovative form of clean coal technology, which can be utilized to build a new, highly efficient, and compact power plant or to retrofit an existing coal-fired power plant in order to achieve lower emissions and significantly improved thermal efficiency. The core technology of the mild gasification power plant lies on the design of a compact and effective mild gasifier that can produce synthesis gases with high energy volatiles through a hybrid system: utilizing the features of both entrained-flow and fluidized bed gasifiers. The objectives of this study are to (a) describe the features and design considerations of this mild gasifier and (b) develop a multiphase computational model to guide the design of the mild-gasifier by investigating the thermal-flow and gasification process inside a conceptual mild gasifier. Due to the involvement of a fluidized bed, the Eulerian-Eulerian method is employed to calculate both the primary phase (air) and the secondary phase (coal particles). Multiphase constitutive equations developed from kinetic theory are employed for calculating the effective shear viscosities, bulk viscosities, and effective thermal conductivities of granular flows to simulate the hydrodynamic and thermal interactions between the solid and gas phases. Multiphase Nativer-Stokes equations and seven global reaction equations with associated species transported equations are implementd to simulate the mild gasification process. Part 1 of this paper documents the design principle of the mild gasifier as well as the development of the computational model starting from single phase, then using multiple phases, and finally including all reactions in the multiphase flow.
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Reports on the topic "Entrained bed reactor"

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Buitrago, Paula A., Mike Morrill, JoAnn S. Lighty, and Geoffrey D. Silcox. Modeling and Experimental Studies of Mercury Oxidation and Adsorption in a Fixed-Bed and Entrained-Flow Reactor. Office of Scientific and Technical Information (OSTI), June 2009. http://dx.doi.org/10.2172/953840.

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