固定床管式反应器内催化剂颗粒堆积与反应模拟  

Simulation of catalyst particle packing and reaction in fixed bed tube reactor

作　　者：汤之强 段晓霞[2] TANG Zhiqiang;DUAN Xiaoxia(Sinopec Beijing Research Institute of Chemical Industry Yanshan Branch,Beijing 102500,China;Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国石化北京化工研究院燕山分院,北京102500 [2]中国科学院过程工程研究所,北京100190

出　　处：《石油化工》2024年第1期41-50,共10页Petrochemical Technology

摘　　要：采用数值模拟方法结合反应动力学,针对乙烯环氧化生产环氧乙烷的反应,考察了直径40.0mm的反应管中填充不同宏观尺寸的单孔或七孔催化剂颗粒时,反应器床层平均空隙率、堆密度以及单位床层高度压降、乙烯转化率、环氧乙烷选择性等参数的变化规律。模拟结果表明,对于七孔催化剂颗粒,随着催化剂外径的增加,床层平均空隙率大体呈现减小的趋势,这与单孔催化剂颗粒的变化趋势类似;而床层堆密度、乙烯转化率、环氧乙烷选择性均大体呈现增加的趋势,与单孔催化剂颗粒的变化趋势相反。The epoxidation reaction of ethylene to ethylene oxide was carried out in reactor tubes with diameter of 40.0 mm filled with single or seven pore catalyst particles of different macro-sizes.The changes of average voidage,bulk density,pressure drop per unit height,ethylene conversion,ethylene oxide selectivity were investigated by numerical simulation method with reaction kinetics.The simulation results show that for seven pore catalyst particles,with the increase of outer diameter of the catalyst,the average voidage generally decreases,which is similar to the trend of single pore particles,however,the bulk density,ethylene conversion,ethylene oxide selectivity generally all show an increasing trend,which are contrary to the trend of single pore particles.

关 键 词：固定床反应器 计算流体力学 银催化剂 乙烯 环氧化 环氧乙烷 

分 类 号：TQ018[化学工程]