二氧化碳协助强化对二甲苯氧化的连续过程实验与模拟  

Continuous experiment and simulation of p-xylene oxidation promoted by CO_2

作　　者：尚建平[1] 吴承洋 赵玲[1] 孙伟振[1] 袁渭康[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《化工学报》2015年第8期2968-2975,共8页CIESC Journal

基　　金：教育部留学回国人员科研启动基金资助项目;国家自然科学基金联合基金项目(U1162202);高等学校学科创新引智计划项目(B08021)~~

摘　　要：利用连续实验装置考察了气相CO2浓度和反应温度对PX氧化反应的影响，并通过反应器建模对连续实验过程进行了模拟计算。研究结果表明，当气相CO2浓度介于40%～60%时，CO2能显著提高反应器出口PX转化率以及主产物收率，并且可以降低液相中主要杂质的含量；温度高于192℃后对反应器出口指标的影响比低温时明显。本文建立的全混流反应器模型能够预测气相CO2含量以及温度等不同反应条件下氧化反应器出口的PX转化率、主产物收率以及液相主要杂质随停留时间的变化。相关研究结果可为当前工业 PX 氧化过程效率提高以及节能降耗提供新的思路。This article focuses on the study of the promoting influence of CO2 on the liquid phase oxidation of p-xylene （PX） under industrial reaction conditions. Using a continuous experimental setup, the influences of gas-phase CO2 content and temperature on PX oxidation were investigated, and the processes were simulated by means of reactor modeling. It was found that CO2 could significantly increase the PX conversion and the yield of the primary product in the reactor outlet and reduce the content of the main impurities in liquid phase, when the CO2 concentration is between 40%—60%. When temperatures are higher than 192℃, the effect of temperature on the reactor outlet index is noticeably higher than that at lower temperatures. The mixed-flow reactor model successfully predicted the main index changes of reactor outlet with the residence time at different CO2 contents and temperatures, such as the PX conversion, yield of the primary product, and the contents of major impurities in the liquid phase. Hopefully, the results of this work could provide new ideas for enhancing efficiency and energy saving of current industrial PX oxidation processes.

关 键 词：连续实验 模拟计算 二氧化碳 对二甲苯 

分 类 号：TQ031.7[化学工程]