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Investigation of solid phase mixing in the multistage circulating fluidized bed. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.05.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Different bubble behaviors in gas-solid fluidized bed of Geldart group A and group C+ particles. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.02.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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A novel technique for residence time distribution (RTD) measurements in solids unit operations. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3D CPFD Simulation of Circulating Fluidized Bed Downer and Riser: Comparisons of Flow Structure and Solids Back-Mixing Behavior. Processes (Basel) 2020. [DOI: 10.3390/pr8020161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The difference of gas-solids flow between a circulating fluidized bed (CFB) downer and riser was compared by computational particle fluid dynamics (CPFD) approach. The comparison was conducted under the same operating conditions. Simulation results demonstrated that the downer showed much more uniform solids holdup and solids velocity distribution compared with the riser. The radial non-uniformity index of the solids holdup in the riser was over 10 times than that in the downer. In addition, small clusters tended to be present in the whole downer, large clusters tended to be present near the wall in riser. It was found that the different cluster behavior is important in determining the different flow behaviors of solids in the downer and riser. While the particle residence time increased evenly along the downward direction in the downer, particles with both shorter and longer residence time were predicted in the whole riser. The nearly vertical cumulative residence time distribution (RTD) curve in the downer further demonstrated that the solids back-mixing in the downer is limited while that in the riser is severe. Solids turbulence in the downer was much weaker compared with the riser, while the large clusters formation near the wall in the riser would hinder solids transportation ability.
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CFD-DEM study of the effect of ring baffles on system performance of a full-loop circulating fluidized bed. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.10.056] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Discrete element method simulation of the mixing process of particles with and without cohesive interparticle forces in a fluidized bed. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.12.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Numerical Investigation of the Ability of Salt Tracers to Represent the Residence Time Distribution of Fluidized Catalytic Cracking Particles. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b03773] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dispersion characteristics of dissimilar materials in a fluidized bed with unevenly distributed fluidizing air. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.07.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Effect of the jet direction of gas nozzle on the residence time distribution of solids in circulating fluidized bed risers. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.12.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Numerical study of the particle residence time and flow characters in an Opposed Multi-Burner gasifier. POWDER TECHNOL 2015. [DOI: 10.1016/j.powtec.2015.07.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mixing of cold and hot particles in a pre-lifting scheme with two strands of catalyst inlets for FCC riser. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.08.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Solids Back-mixing Behavior and Effect of the Mesoscale Structure in CFB Risers. Ind Eng Chem Res 2013. [DOI: 10.1021/ie3034448] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Measurement of ferromagnetic particle concentration for characterization of fluidized bed fluid-dynamics. POWDER TECHNOL 2013. [DOI: 10.1016/j.powtec.2013.01.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Computation of system turbulences and dispersion coefficients in circulating fluidized bed downer using CFD simulation. Chem Eng Res Des 2012. [DOI: 10.1016/j.cherd.2012.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Electrical Capacitance Volume Tomography Imaging of Three-Dimensional Flow Structures and Solids Concentration Distributions in a Riser and a Bend of a Gas–Solid Circulating Fluidized Bed. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300746q] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Quantifying lateral solids mixing in a fluidized bed by modeling the thermal tracing method. AIChE J 2011. [DOI: 10.1002/aic.12627] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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MEASUREMENT TECHNIQUES AND DATA INTERPRETATIONS FOR VALIDATING CFD MULTI PHASE REACTOR MODELS. CHEM ENG COMMUN 2007. [DOI: 10.1080/00986440108912870] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Design and Fluid Dynamic Analysis of a Bench-Scale Combustion System with CO2 Separation−Chemical-Looping Combustion. Ind Eng Chem Res 2005. [DOI: 10.1021/ie049670u] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lateral and Axial Mixing of the Dispersed Particles in CFB. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 1995. [DOI: 10.1252/jcej.28.506] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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The influence of particle residence time distribution on the reactivity in fluidized bed reactors. Chem Eng Sci 1994. [DOI: 10.1016/0009-2509(94)e0044-q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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