化工学报2019，Vol.70Issue(9)：3404-3411,8.DOI:10.11949/0438-1157.20190241
费托合成蛋壳型催化剂活性组分厚度的模拟计算
Simulation of active component thickness of egg-shell catalyst for F-T synthesis
应景涛 1李涛1
作者信息
- 1. 华东理工大学大型反应器工程教育部工程研究中心,上海200237
- 折叠
摘要
Abstract
The CFD simulation of the egg-shell Co-based catalyst Fischer-Tropsch synthesis reaction system was carried out by Comsol-Multiphysics software. The effects of catalyst active component thickness on product and temperature distribution, conversion of F-T synthesis were studied by establishing a reasonable three-dimensional model of catalyst. The results show that the CO concentration has obvious difference between the outside and inside of catalyst due to strong diffusion limitation. And because the diffusion rate of H2 is much larger than the diffusion rate of CO, the internal hydrogen-carbon ratio of the catalyst particles is very high, which is not conducive to the formation of oils and waxes. As the thickness of catalyst active components increases, the conversion of CO and the selectivity of methane and low hydrocarbons increases, while the selectivity of C10H22 and C22H46 decreases. The peak temperature inside the catalyst moves towards the inside of the catalyst, which isn't conducive to the transfer of reaction heat. For the shell-type spherical catalyst with the size of 2.5mm, the optimum catalyst thickness of the active component is 0.125 mm.关键词
费托合成/计算流体力学/扩散/催化剂/活性组分厚度Key words
F-T synthesis/computational fluid dynamics/diffusion/catalyst/thickness of active components分类
化学化工引用本文复制引用
应景涛,李涛..费托合成蛋壳型催化剂活性组分厚度的模拟计算[J].化工学报,2019,70(9):3404-3411,8.
