Numerical Analyses of Heterogeneous CLC Reaction and Transport Processes in Large Oxygen Carrier Particles
Heterogeneous chemical looping combustion (CLC) reactions and conjugate transports in large oxygen carrier particles were numerically investigated with computational fluid dynamics (CFD) approaches, in which a simplified noncatalytic reaction model was implemented for reducing intraparticle modellin...
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| Veröffentlicht in: | Processes 2021-01, Vol.9 (1), p.125 |
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| creator | Huo, Guanping Guo, Xueyan |
| description | Heterogeneous chemical looping combustion (CLC) reactions and conjugate transports in large oxygen carrier particles were numerically investigated with computational fluid dynamics (CFD) approaches, in which a simplified noncatalytic reaction model was implemented for reducing intraparticle modelling computation. Volumic gas-solid reactions were treated as surface reactions based on the equivalent internal surface in the particle model. In large porous particles such as fixed bed CLC reactors, the heterogeneous reactions are often limited by intraparticle diffusion. Comprehensive analyses were conducted on transports across the particle surface and their influences on reactions inside the single particles. A threshold Reynolds number of external convections was found for the enhancement of intraparticle reactions. The heterogeneous reactions, intraparticle diffusions and interstitial transports in a fixed bed CLC reactor randomly packed with 597 spheres were thoroughly analysed with the same numerical approaches. Comprehensive insights of the temporal evolution and spatial distribution of scalars in the packed bed reactor were presented. |
| doi_str_mv | 10.3390/pr9010125 |
| format | Article |
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Volumic gas-solid reactions were treated as surface reactions based on the equivalent internal surface in the particle model. In large porous particles such as fixed bed CLC reactors, the heterogeneous reactions are often limited by intraparticle diffusion. Comprehensive analyses were conducted on transports across the particle surface and their influences on reactions inside the single particles. A threshold Reynolds number of external convections was found for the enhancement of intraparticle reactions. The heterogeneous reactions, intraparticle diffusions and interstitial transports in a fixed bed CLC reactor randomly packed with 597 spheres were thoroughly analysed with the same numerical approaches. Comprehensive insights of the temporal evolution and spatial distribution of scalars in the packed bed reactor were presented.</description><identifier>ISSN: 2227-9717</identifier><identifier>EISSN: 2227-9717</identifier><identifier>DOI: 10.3390/pr9010125</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Carbon dioxide ; Chemical reactions ; Computational fluid dynamics ; Computer applications ; Efficiency ; Fixed bed reactors ; Fixed beds ; Fluid flow ; Fluidized bed combustion ; Gas-solid reactions ; Grain size ; Heat ; Mathematical models ; Numerical analysis ; Oxygen ; Packed beds ; Partial differential equations ; Reynolds number ; Scalars ; Simulation ; Spatial distribution ; Surface reactions ; Turbulence models</subject><ispartof>Processes, 2021-01, Vol.9 (1), p.125</ispartof><rights>2021. This work is licensed under http://creativecommons.org/licenses/by/3.0/ (the “License”). 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Comprehensive insights of the temporal evolution and spatial distribution of scalars in the packed bed reactor were presented.</description><subject>Carbon dioxide</subject><subject>Chemical reactions</subject><subject>Computational fluid dynamics</subject><subject>Computer applications</subject><subject>Efficiency</subject><subject>Fixed bed reactors</subject><subject>Fixed beds</subject><subject>Fluid flow</subject><subject>Fluidized bed combustion</subject><subject>Gas-solid reactions</subject><subject>Grain size</subject><subject>Heat</subject><subject>Mathematical models</subject><subject>Numerical analysis</subject><subject>Oxygen</subject><subject>Packed beds</subject><subject>Partial differential equations</subject><subject>Reynolds number</subject><subject>Scalars</subject><subject>Simulation</subject><subject>Spatial distribution</subject><subject>Surface reactions</subject><subject>Turbulence models</subject><issn>2227-9717</issn><issn>2227-9717</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpNUM1Kw0AYXETBUnvwDRY8eYjub7Z7LEFtIdgi9Ry2my8lJc3GbxOwb29KRZzLzGFmYIaQe86epLTsuUPLOONCX5GJEMIk1nBz_U_fklmMBzbCcjnX6YQc3ocjYO1dQxeta04RIg0VXUIPGPbQQhgizfKMfoDzfR1a6tqSbtG1sQvY0w0GD_GcqluaO9wDXX-fxiDNHGINSDcO-9o3EO_ITeWaCLNfnpLP15dttkzy9dsqW-SJF1b0yc5I4TSbCzBeC-nA63lZerUrd8akqRbK20pZ5lLFtLelsZJJYStQJauU1nJKHi69HYavAWJfHMKA47hYCGUMF5ZbNboeLy6PIUaEquiwPjo8FZwV5zeLvzflD3qYZvw</recordid><startdate>20210101</startdate><enddate>20210101</enddate><creator>Huo, Guanping</creator><creator>Guo, Xueyan</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>LK8</scope><scope>M7P</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0002-2262-5357</orcidid></search><sort><creationdate>20210101</creationdate><title>Numerical Analyses of Heterogeneous CLC Reaction and Transport Processes in Large Oxygen Carrier Particles</title><author>Huo, Guanping ; 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Volumic gas-solid reactions were treated as surface reactions based on the equivalent internal surface in the particle model. In large porous particles such as fixed bed CLC reactors, the heterogeneous reactions are often limited by intraparticle diffusion. Comprehensive analyses were conducted on transports across the particle surface and their influences on reactions inside the single particles. A threshold Reynolds number of external convections was found for the enhancement of intraparticle reactions. The heterogeneous reactions, intraparticle diffusions and interstitial transports in a fixed bed CLC reactor randomly packed with 597 spheres were thoroughly analysed with the same numerical approaches. 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| source | MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Carbon dioxide Chemical reactions Computational fluid dynamics Computer applications Efficiency Fixed bed reactors Fixed beds Fluid flow Fluidized bed combustion Gas-solid reactions Grain size Heat Mathematical models Numerical analysis Oxygen Packed beds Partial differential equations Reynolds number Scalars Simulation Spatial distribution Surface reactions Turbulence models |
| title | Numerical Analyses of Heterogeneous CLC Reaction and Transport Processes in Large Oxygen Carrier Particles |
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