文献类型：期刊文献

中文题名：管式固定床反应器中Fe基费托合成的多物理场耦合数值分析

英文题名：Multiphysics-coupled Numerical Analysis on Fe-based Fischer-Tropsch Synthesis in Tubular Fixed-bed Reactor

作者：曹军[1];张莉[1];徐宏[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2016

卷号：32

期号：3

起止页码：605

中文期刊名：石油学报（石油加工）

外文期刊名：Acta Petrolei Sinica(Petroleum Processing Section)

收录：CSTPCD;;EI(收录号：20162702553985);Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：中央高校基本科研业务费探索基金项目(WG1414044)资助

语种：中文

中文关键词：管式固定床反应器;费托合成;转化率;碳原子选择性;数值分析

外文关键词：tubular fixed-bed reactor;;Fischer-Tropsch synthesis;;conversion rate;;C-atom selectivity;;numerical analysis

摘要：通过构建包含动量、能量、质量传递以及化学反应动力学方程的多物理场耦合数值模型,计算了Fe基催化剂管式固定床反应器中的费托合成过程,分析了费托合成管式反应通道中的速度、压力与温度分布,以及温度、流速和反应物n(H_2)/n(CO)3个因素对产物选择性的影响,阐明了沿着气体流动方向的反应速率变化趋势。结果表明,催化剂段入口处存在"热点"区域;在费托合成烃类产物中,CH_4的碳原子选择性最高,其次是C5+类产物;C_(5+)产物的选择性随着温度、流速和n(H_2)/n(CO)的增大均有所降低。构建的数值模型及相关结论有助于从传递及反应过程的角度,为固定床反应器内费托合成操作工艺的优化提供理论参考。
The Fischer-Tropsch synthesis in tubular fixed bed reactor over Fe catalyst was studied by developing the multiphysics-coupled numerical model containing the momentum,energy and mass transfer,as well as the chemical kinetic equations.The velocity,pressure and temperature distributions in the reaction tube were analyzed,and the effects of temperature,flow velocity,as well as H_2/CO molar ratio were discussed.The variation trend of reaction rate along the flow direction was explained.It is found that there was a 'hot point'at the inlet region of catalyst section,and the C-atom selectivity of CH_4 was the highest in the alkanes products of FischerTropsch synthesis,while C_(5+) was the second one.The selectivity of C_(5+) decreased with the increases of temperature,flow velocity and H_2/CO molar ratio.The developed numerical model is helpful for the process optimization of Fischer-Tropsch in fixed bed reactor from the viewpoint of transfer and reaction process.