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1

Almond, Robert R. "Small particle separation in a circulating fluidized bed riser system." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4342.

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Thesis (M.S.)--West Virginia University, 2005.<br>Title from document title page. Document formatted into pages; contains xiii, 104 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 86-87).
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2

Puchyr, David Michael John. "A predictive model for a circulating fluidized bed riser reactor." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0030/NQ38498.pdf.

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3

Hensler, Timo [Verfasser]. "Fluid Dynamic Characterization of Circulating Fluidized Bed Riser Reactors / Timo Hensler." München : Verlag Dr. Hut, 2020. http://d-nb.info/1219474754/34.

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4

Shah, Milinkumar T. "Coarse grid simulation of gas-solid flows in riser." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/1882.

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Gas-solid risers have been extensively used as multiphase reactors in circulating fluidized bed (CFB) system such as fluid catalytic cracking (FCC) and Circulating fluidized bed combustion (CFBC). In FCC, a riser facilitates cracking reactions which take place between fluidized catalyst and vaporised vacuum gas oil. Similarly in CFBC, combustion of coal particle occurs in the riser. The gas-solid flow hydrodynamics in riser plays a dominant role in governing the conversion of the chemical process, and in turn the performance of the CFB system. Therefore, several experimental and numerical stud
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5

Huang, Yue. "Dynamic model of circulating fluidized bed." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4823.

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Thesis (Ph. D.)--West Virginia University, 2006.<br>Title from document title page. Document formatted into pages; contains ix, 133 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 103-114).
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6

Salvaterra, Antonio de Barros R. L. A. "Hydrodynamics of gas-solid suspension in a circulating fluidized bed riser : a comparative study." Thesis, Heriot-Watt University, 2003. http://hdl.handle.net/10399/418.

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7

Gupta, Suneel Krishan. "Modeling the hydrodynamics of large-scale circulating fluidized bed risers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0025/MQ31388.pdf.

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8

Ball, Jeffrey S. "Comprehensive studies of the solids flux in riser and downer circulating fluidized beds." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0002/MQ42048.pdf.

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9

Santos, Fernando Luiz Pio dos. "Simulação numérica euleriana de escoamento gás-sólido em riser com dimensões reduzidas aplicando malhas refinadas." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-17012011-144729/.

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Dada a complexidade hidrodinâmica de escoamentos gás-sólidos em leitos fluidizados muitas pesquisas têm sido realizadas abordando questões relativas a natureza altamente instável desse processo de fluidização. O conhecimento dessa hidrodinâmica permite estabelecer os parâmetros corretos para reação e transporte de massa em um reator de leito fluidizado, permitindo tomada de decisões à respeito do desempenho do reator. Modelos Eulerianos do contínuo, onde as fases coexistentes são tratadas como meios contínuos interpenetrantes, representam a aproximação mais prática para simular a hidrodinâmica
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10

Wang, Fei. "Gas-Solid Fluidization: ECVT Imaging and Mini-/Micro-Channel Flow." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1290390285.

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11

Da, silva Rodrigues Sofia. "Riser hydrodynamic study with Group B particles for Chemical Looping Combustion." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10230/document.

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La combustion en boucle chimique (CLC) est un procédé du type oxy-combustion où des particules sont utilisées pour fournir de l'oxygène à la combustion. Des études sont nécessaires pour l'extrapolation et l'optimisation du procédé CLC, fonction des propriétés des particules du groupe B et de la technologie CFB. Les études hydrodynamiques ont été faites dans un riser de 18 m de hauteur. Des profils axiaus de pression, ainsi que les profils radiaux de flux et de quantité de mouvement ont été obtenus. Trois types de particules ont été utilisées ayant un diamètre de Sauter entre 250 et 300 μm et u
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12

Utzig, Jonathan. "Dinâmica das partículas em leito fluidizado circulante." Universidade Federal de Uberlândia, 2016. https://repositorio.ufu.br/handle/123456789/18235.

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CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>A presente tese e voltada à investigação da dinâmica das partículas em um riser de leito fluidizado circulante (CFB). Os leitos fluidizados sao comumente encontrados em aplicações de diversas areas industriais, como na secagem e revestimento de partículas, na polimerizaçao, na combustao e gaseificacao de carvão ou biomassa, no craqueamento catalítico de gasóleo. Dada a importancia da compreensão fenomenologica dos mecanismos que ocorrem nestes equipamentos, este trabalho utiliza de experimentacães física material e numeric
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13

Gómez, Luben Cabezas. "Modelagem matemática e simulação numérica de escoamentos bifásicos gás-sólido em colunas de leito fluidizado circulante." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-21102015-123706/.

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Foram desenvolvidos estudos de modelagem e simulação numérica de escoamentos bifásicos gás-sólido na coluna ascendente de leitos fluidizados circulantes utilizando um modelo Euleriano de duas fases separadas. O sistema de equações diferenciais parciais conservativas governantes foi obtido através de um procedimento tradicional. Ambas as fases foram assumidas como meio contínuo. Aplicou-se o procedimento de médias estatísticas de Euler, enfatizando a obtenção dos modelos hidrodinâmicos A e B desenvolvidos no IIT/ANL. Realizou-se análise comparativa de correlações para transferência de qu
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14

Fusey, Isabelle. "A novel circulating fluidized bed." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25094.

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A novel type of circulating fluidized bed has been investigated and tested. While a conventional circulating fluidized bed unit consists of two vessels standing side by side - a fast bed operating at high gas velocity, and a slow bed which acts as a recycle vessel and operates at a much lower velocity - the novel design incorporates the two beds into a unique concentric arrangement. The inner column acts as the fast bed and the annular region acts as the slow bed. A baffle to separate the gas-solid mixture at the top of the inner column has been designed and tested. The baffle works reasonabl
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15

Gogebakan, Yusuf. "Simulation Of Circulating Fluidized Bed Combustors." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607775/index.pdf.

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A dynamic mathematical model for simulation of atmospheric circulating fluidized bed combustors has been developed on the basis of first principles and empirical correlations. The model accounts for dense and dilute zone hydrodynamics, volatiles release and combustion, char particles combustion and their size distribution, and heat transfer from/to gas, particles, waterwalls and refractory. Inputs to the model include configuration and dimensions of the combustor and its internals, air and coal flows, coal analysis, all solid and gas properties, inlet temperatures of air, cooling water, and f
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16

Courbariaux, Yann. "Heat transfer in a circulating fluidized bed." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/MQ46243.pdf.

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17

Redemann, Kai. "Ash management in circulating fluidized bed combustors." Aachen Shaker, 2008. http://d-nb.info/991096231/04.

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18

Ricci, Vanessa Burque. "Caracterização de regimes estatisticamente permanentes em leitos fluidizados circulantes." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-19012011-143708/.

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Reatores de leito fluidizado circulante são caracterizados por escoamentos altamente heterogêneos e instáveis. Devido a isso, operam em regimes pseudo-estacionários ou estatisticamente permanentes, onde os parâmetros do escoamento oscilam em torno de valores médios bem definidos. Neste trabalho estuda-se o comportamento de uma solução numérica para um escoamento típico de reatores de leito fluidizado circulante na região estatisticamente permanente. A simulação numérica foi realizada com o modelo de dois fluidos. A partir dos dados de simulação são estabelecidas médias e auto-correlações para
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19

Wu, Richard Lap. "Heat transfer in circulating fluidized beds." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/31037.

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Heat transfer in circulating fluidized beds was studied in both a 7.3 m high, 152 x 152 mm square, pilot-scale combustor and a 9.3 m high, 152 mm ID transparent cold model unit. Results were obtained for particles of mean size 171-299 µm at superficial gas velocities from 4 to 9.5 m/s and for solids circulation rates up to 70 kg/m².s. For the combustor, results obtained by using membrane walls and a vertical tube as heat transfer surfaces show a strong influence of the cross-sectional area-averaged suspension density on time-averaged, length-averaged suspension-to-surface heat transfer coeffic
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20

Herbert, Peter M. "Hydrodynamic study of a downflow circulating fluidized bed." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0005/NQ32310.pdf.

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21

Moran, James C. (James Christopher). "Gas phase hydrodynamics inside a circulating fluidized bed." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/89304.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.<br>Includes bibliographical references (p. 165-171).<br>Circulating Fluidized Beds (CFB's) offer many advantages over traditional pulverized coal burners in the power generation industry. They operate at lower temperatures, have better environmental emissions and better fuel flexibility. The motion of solids inside a CFB has been studied extensively over the previous twenty years. However the motion of gas is less well understood. There has previously only been indirect measurements of gas velocities
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22

Wischnewski, Reiner. "Simulation of large-scale circulating fluidized bed combustors." Aachen Shaker, 2008. http://d-nb.info/993341691/04.

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23

Meer, Egbert Heine van der. "Riser exits and scaling of circulating fluidised beds." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249068.

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24

Ozkan, Mert. "Simulation Of Circulating Fluidized Bed Combustors Firing Indigenous Lignite." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612686/index.pdf.

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A comprehensive model, previously developed for a rectangular parallelepiped shaped 0.3 MWt circulating fluidized bed combustor (CFBC) fired with high calorific value coal burning in sand and validated against experimental data is adapted to cylindrical configuration and is extended to incorporate NOx formation and reduction reactions and pressure drops around cyclone, downcomer and loop seal. Its predictive accuracy is tested by applying it to the simulation of Middle East Technical University (METU) 150 kWt CFBC burning low calorific value indigenous lignite with high Volatile Matter/Fixed C
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25

Stewart, Michael C. "Sulfation Phenomena Under Oxy-Fuel Circulating Fluidized Bed Conditions." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20024.

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Oxy-fuel fired circulating fluidized bed combustion (CFBC) provides a means to generate electrical power while reducing anthropogenic CO2 while at the same time reducing the acid-rain precursor, SO2 by utilizing in-situ limestone addition. Although the technology has been around for 30 years, it has only recently been gaining considerable attention, with a handful of pilot-scale units worldwide. Oxy-fuel is largely similar to standard air-fired combustion but differs in a few key respects, one of which is in the elevated concentrations of CO2 and H2O (up to 90% and 30%, respectively). The effe
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26

Burkell, James J. "Solids circulation rate measurement in a circulating fluidized bed." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26217.

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This thesis documents the investigation of three methods of determining solids fluxes in a circulating fluidized bed (CFB). An impact flowmeter used the force of the recirculating particles striking a pan which spanned the diameter of the return column to measure solids circulation rates. A modified orifice, with a conical entrance section, used the additional pressure differential resulting from solids flowing counter-currently to gas to determine solids fluxes. The third method used the velocities of particles travelling through the vertical section of an L-valve to determine solids circulat
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27

Zheng, Ying. "Flow structure in a liquid-solids circulating fluidized bed." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0013/NQ42560.pdf.

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28

Sajjakulnukit, Boonrod. "Hydrodynamics and heat transfer in a circulating fluidized bed." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0018/NQ46298.pdf.

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29

Redemann, Kai [Verfasser]. "Ash Management in Circulating Fluidized Bed Combustors / Kai Redemann." Aachen : Shaker, 2008. http://d-nb.info/1161313621/34.

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30

Naren, P. R. "Modeling of high solid flux circulating fluidized bed reactors." Thesis(Ph.D.), Institute of Chemical Technology, Mumbai, 2009. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2772.

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31

Wischnewski, Reiner [Verfasser]. "Simulation of Large-Scale Circulating Fluidized Bed Combustors / Reiner Wischnewski." Aachen : Shaker, 2009. http://d-nb.info/1126378720/34.

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32

Bischi, Aldo. "Chemical Looping Reactor System Design : Double Loop Circulating Fluidized Bed (DLCFB)." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16972.

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Chemical looping combustion (CLC) is continuously gaining more importance among the carbon capture and storage (CCS) technologies. It is an unmixed combustion process which takes place in two steps. An effective way to realize CLC is to use two interconnected fluidized beds and a metallic powder circulating among them, acting as oxygen carrier. The metallic powder oxidizes at high temperature in one of the two reactors, the air reactor (AR). It reacts in a highly exothermic reaction with the oxygen of the injected fluidizing air. Afterwards the particles are sent to the other reactor where the
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33

Boyd, David Anthony. "Internally circulating fluidized bed membrane reactor for high-purity hydrogen production." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/30745.

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A novel reactor configuration, the internally circulating fluidized bed membrane reactor (ICFBMR), was studied in an experimental program for the steam reforming (SMR) of natural gas to produce hydrogen. This work builds on previous fluidized bed membrane reactor (FBMR) research, in which H[sub 2]-selective membranes were located within a fluidized bed of catalyst to produce a H[sub 2] streamdirectly from the reactor, thereby shifting the chemical equilibrium of the reforming reaction forward. The ICFBMR advances this concept by modifying the reactor geometry in order to induce circulatio
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34

Cruz, Torres Elizabet Ananay. "Modelling of a circulating fluidized bed using computational fluid dynamics software." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0007/MQ46244.pdf.

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35

Panday, Rupendranath. "Modeling, identification and control of a cold flow circulating fluidized bed." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5833.

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Thesis (M.S.)--West Virginia University, 2008.<br>Title from document title page. Document formatted into pages; contains xiii, 99 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 94-99).
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36

Niva, L. (Laura). "Self-optimizing control of oxy-combustion in circulating fluidized bed boilers." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526221304.

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Abstract Energy production in combustion power plants is a significant source of anthropogenic carbon dioxide emissions. The targets of international climate agreements call for utilizing all available technologies to achieve rapid and cost-effective emission reductions. Carbon capture and storage is one of the possible technical solutions applied in combustion power plants. Circulating fluidized bed boilers have gained increasing popularity due to advantages in availability, emission control, fuel flexibility and option for using challenging fuels, and the possibility of using high-efficiency
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37

Goldblatt, William M. "Electromagnetic induction sensing of individual tracer particles in a circulating fluidized bed." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30918.

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Understanding the trajectories of particulate solids inside a flow-through reactor, such as the riser of a recirculating fluidized bed, is a basic requisite to accurately modelling the reactor. However, these trajectories, which are complicated by gross internal recirculation, are not readily measurable. Conventional means of measuring the residence time distribution can be applied to closed boundaries, such as the exit of the riser. Doing so, however, does not directly provide the details of the trajectories within the riser. In order to determine these trajectories, meaningful measurements
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38

Karppanen, E. (Erkki). "Advanced control of an industrial circulating fluidized bed boiler using fuzzy logic." Doctoral thesis, University of Oulu, 2000. http://urn.fi/urn:isbn:9514255194.

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Abstract Circulating Fluidized Bed (CFB) boilers are widely used for multi-fuel combustion of waste and bio-fuels. When several non-homogeneous fuels, having varying heat values, are burned simultaneously, the boiler control system can be affected by various control challenges, especially since it is not feasible to reliably measure the energy content of the multi-fuel flow. In order to fulfill energy production needs and maintain the ability to burn low grade fuels, co-firing with high heat value fuels such as gas, oil or coal is needed. Fuzzy Logic Control (FLC) has been successfully used
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39

Ma, Ying L. "Heat transfer studies in a gas-solids downflow circulating fluidized bed, downer." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0003/MQ30689.pdf.

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40

Hassan, Mohamed. "Modelling and simulation of biomass gasification in a circulating fluidized bed reactor." Thesis, Aston University, 2013. http://publications.aston.ac.uk/20858/.

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Computational Fluid Dynamics (CFD) has found great acceptance among the engineering community as a tool for research and design of processes that are practically difficult or expensive to study experimentally. One of these processes is the biomass gasification in a Circulating Fluidized Bed (CFB). Biomass gasification is the thermo-chemical conversion of biomass at a high temperature and a controlled oxygen amount into fuel gas, also sometime referred to as syngas. Circulating fluidized bed is a type of reactor in which it is possible to maintain a stable and continuous circulation of solids i
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41

Valmari, Tuomas. "Potassium behaviour during combustion of wood in circulating fluidised bed power plants /." Espoo [Finland] : Technical Research Centre of Finland, 2000. http://www.vtt.fi/inf/pdf/publications/2000/P414.pdf.

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42

Petersen, Inga [Verfasser]. "Sewage Sludge Gasification in the Circulating Fluidized Bed : Experiments and Modeling / Inga Petersen." Aachen : Shaker, 2004. http://d-nb.info/1172612110/34.

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43

Noymer, Peter Daniel. "Heat transfer by particle convection at the wall of a circulating fluidized-bed." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10435.

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44

Ratschow, Lars. "Three-dimensional simulation of temperature distributions in large scale circulating fluidized bed combustors." Aachen Shaker, 2009. http://d-nb.info/99450196X/04.

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45

Sarra, Angela M. "Particle-wall shear stress measurements within the standpipe of a circulating fluidized bed." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2078.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains xi, 137 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 136-137).
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46

De, Fonseca Pimentel Vittoria. "Technical comparison and economic evaluations of moving grate and circulating fluidized bed combustion technologies." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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The following work is the result of an internship carried out at STC POWER Company, in the proposal office, with the aim to make a technical comparison of two combustion technologies, Moving Grate (MG) and Circulating Fluidized Bed (CFB), in order to find out which is the optimal solution for a specific biomass power plant. After a preliminary description of the fuel considered (biomass) and an overview of the operating principle of a combined heat and power (CHP) plant, the attention has been paid to the main differences of the two boilers, focusing on: fuel characteristics, pollutant emissi
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47

Wang, Yi-Ning. "CFD investigation of gas-solid flow dynamics in monolithic micro-circulating fluidized bed reactors." Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25760/25760.pdf.

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48

Tan, Richard Hing-Fung. "Experimental simulation of the hydrodynamics of dissimilar solids in a pressurized circulating fluidized bed." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10483.

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49

Mahmoudi, Shiva. "The circulating fluidized bed (CFB) combustion of biomass and the control of gaseous emissions." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/45425/.

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50

Wang, Yining. "CFD investigation of gas-solid flow dynamics in monolithic micro-circulating fluidized bed reactors." Master's thesis, Université Laval, 2008. http://hdl.handle.net/20.500.11794/20312.

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La biomasse est une des sources importantes d'énergie primaire et renouvelable. Le développement d'un procédé basé sur la conversion de celle-ci en énergie tout en demeurant respectueux de l'environnement, fait l'objet de recherches intenses aussi bien dans les mondes académique qu'industriel. La gazéification pour produire un gaz de biosynthèse est considérée comme une des options les plus prometteuses via la valorisation des sources de résidus de biomasse. La thermodynamique et la cinétique intrinsèque imposent que les réactions de gazéification de la biomasse doivent être effectuées à des t
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