Effectiveness factor of a catalytic sphere in particle assemblage approached with a cell model
文献类型：期刊论文
| 作者 | Mao, Zai-Sha; Yang, Chao; Wang, Yuefa |
| 刊名 | CHEMICAL ENGINEERING SCIENCE
 |
| 出版日期 | 2007-11-01 |
| 卷号 | 62期号:22页码:6475-6485 |
| 关键词 | cell model catalyst sphere eflectiveness factor particle assemblage numerical simulation |
| ISSN号 | 0009-2509 |
| 其他题名 | Chem. Eng. Sci. |
| 中文摘要 | The cell model approach was extended to the catalytic reaction over a spherical catalyst pellet and the effects of several parameters on the effectiveness factor were investigated via numerical simulation. The proposed mathematical model consisted of the partial differential equations for gas reactant flow in the external gas phase around a catalyst sphere, mass transport in the gas phase, and two-dimensional diffusion-reaction in the catalytic sphere. Numerical simulation in the orthogonal boundary fitted reference frame demonstrated the decrease in effectiveness factor of a catalyst sphere due to the external mass transfer resistance and inter-particle hydrodynamic interaction. It was observed that the voidage of the particle assemblage shows more recognized influence than the Peclet and Reynolds numbers of particles and the azimuthal diffusion of reactant inside the particle was negligible. On this basis, a simplified set of cell model equations for catalytic reaction in particle assemblages were proposed. An example of optimizing search indicated the present model may be used to detect the most strong influence on catalytic reaction in particle assemblage over the practical ranges of operating and designing parameters to avoid excessive loss in the effectiveness factor. (c) 2007 Elsevier Ltd. All rights reserved. |
| 英文摘要 | The cell model approach was extended to the catalytic reaction over a spherical catalyst pellet and the effects of several parameters on the effectiveness factor were investigated via numerical simulation. The proposed mathematical model consisted of the partial differential equations for gas reactant flow in the external gas phase around a catalyst sphere, mass transport in the gas phase, and two-dimensional diffusion-reaction in the catalytic sphere. Numerical simulation in the orthogonal boundary fitted reference frame demonstrated the decrease in effectiveness factor of a catalyst sphere due to the external mass transfer resistance and inter-particle hydrodynamic interaction. It was observed that the voidage of the particle assemblage shows more recognized influence than the Peclet and Reynolds numbers of particles and the azimuthal diffusion of reactant inside the particle was negligible. On this basis, a simplified set of cell model equations for catalytic reaction in particle assemblages were proposed. An example of optimizing search indicated the present model may be used to detect the most strong influence on catalytic reaction in particle assemblage over the practical ranges of operating and designing parameters to avoid excessive loss in the effectiveness factor. (c) 2007 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | INTERMEDIATE REYNOLDS-NUMBERS ; FLUIDIZED-BEDS ; HEAT-TRANSFER ; NUMERICAL-SIMULATION ; MASS-TRANSFER ; VISCOUS-FLOW ; MULTIPARTICLE SYSTEMS ; TRANSPORT ; DROP |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000250947200033 |
| 公开日期 | 2013-10-15 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3416]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mao, Zai-Sha,Yang, Chao,Wang, Yuefa. Effectiveness factor of a catalytic sphere in particle assemblage approached with a cell model[J]. CHEMICAL ENGINEERING SCIENCE,2007,62(22):6475-6485. |
| APA | Mao, Zai-Sha,Yang, Chao,&Wang, Yuefa.(2007).Effectiveness factor of a catalytic sphere in particle assemblage approached with a cell model.CHEMICAL ENGINEERING SCIENCE,62(22),6475-6485. |
| MLA | Mao, Zai-Sha,et al."Effectiveness factor of a catalytic sphere in particle assemblage approached with a cell model".CHEMICAL ENGINEERING SCIENCE 62.22(2007):6475-6485. |
入库方式： OAI收割
来源：过程工程研究所
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