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Wang C, Zhang J, Lan X, Gao J, Zhu J. Quantitative Study of the Gas–Solids Flow and Its Heterogeneity/Nonuniformity in a 14 m Two-Dimensional CFB Riser Reactor. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b05829] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chengxiu Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Jiazhi Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | | | - Jinsen Gao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Jesse Zhu
- Department of Chemical & Biochemical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9
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2
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Abstract
Sulphur dioxide (SO2) is mostly emitted from coal-fueled power plants, from waste incineration, from sulphuric acid manufacturing, from clay brick plants and from treating nonferrous metals. The emission of SO2 needs to be abated. Both wet scrubbing (absorption) and dry or semi-dry (reaction) systems are used. In the dry process, both bubbling and circulating fluidized beds (BFB, CFB) can be used as contactor. Experimental results demonstrate a SO2-removal efficiency in excess of 94% in a CFB application. A general model of the heterogeneous reaction is proposed, combining the external diffusion of SO2 across the gas film, the internal diffusion of SO2 in the porous particles and the reaction as such (irreversible, 1st order). For the reaction of SO2 with a fine particulate reactant, the reaction rate constant and the relevant contact time are the dominant parameters. Application of the model equations reveals that the circulating fluidized bed is the most appropriate technique, where the high solid to gas ratio guarantees a high conversion in a short reaction time. For the CFB operation, the required gas contact time in a CFB at given superficial gas velocities and solids circulation rates will determine the SO2 removal rate.
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3
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Li Y, Zhai G, Zhang H, Li T, Sun Q, Ying W. Experimental and predictive research on solids holdup distribution in a CFB riser. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2018.12.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Popuri AK, Garimella P. Experimental study of hydrodynamics leading to estimation of acceleration length in a laboratory riser system using sand and limestone. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2018.1495199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ashok Kumar Popuri
- Department of Chemical Engineering, S.V.U. College of Engineering, S.V. University, Tirupati, India
- Department of Chemical Engineering, VFSTR, Guntur, India
| | - Prabhakar Garimella
- Department of Chemical Engineering, S.V.U. College of Engineering, S.V. University, Tirupati, India
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5
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6
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Investigation of core-annular flow in an industrial scale circulating fluidized bed riser with electrical capacitance volume tomography (ECVT). POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.12.094] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Kong W, Tan T, Baeyens J, Flamant G, Zhang H. Bubbling and Slugging of Geldart Group A Powders in Small Diameter Columns. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04798] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weibin Kong
- School
of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Tianwei Tan
- School
of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jan Baeyens
- School
of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
- European Powder and Process Technology, 3120 Tremelo, Belgium
| | - Gilles Flamant
- Promes-CNRS,
Centre
National de Recherche Scientifique, 66120 Font Romeu, France
| | - Huili Zhang
- School
of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
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8
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Shi L, Wei Y, Luo N, Tan T, Cao H. The rheological and thickening properties of cationic xanthan gum. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2017.1293547] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Lujiao Shi
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, PR China
| | - Yi Wei
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, PR China
| | - Nan Luo
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, PR China
| | - Tianwei Tan
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, PR China
| | - Hui Cao
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, PR China
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