二氧化碳协助强化对二甲苯氧化的连续过程实验与模拟

doi:10.11949/j.issn.0438-1157.20150655

化工学报 ›› 2015, Vol. 66 ›› Issue (8): 2968-2975.DOI: 10.11949/j.issn.0438-1157.20150655

• 催化、动力学与反应器 • 上一篇下一篇

二氧化碳协助强化对二甲苯氧化的连续过程实验与模拟

尚建平, 吴承洋, 赵玲, 孙伟振, 袁渭康

华东理工大学化学工程联合国家重点实验室, 上海 200237

收稿日期:2015-05-21 修回日期:2015-05-25 出版日期:2015-08-05 发布日期:2015-08-05
通讯作者: 孙伟振
基金资助:
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)。

Continuous experiment and simulation of p-xylene oxidation promoted by CO₂

SHANG Jianping, WU Chengyang, ZHAO Ling, SUN Weizhen, YUAN Weikang

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2015-05-21 Revised:2015-05-25 Online:2015-08-05 Published:2015-08-05
Supported by:
supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, the Joint Funds of the National Natural Science Foundation of China (U1162202) and the Programme of Introducing Talents of Discipline to Universities (B08021).

摘要/Abstract

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。

关键词: 连续实验, 模拟计算, 二氧化碳, 对二甲苯

Abstract:

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.

Key words: carbon dioxide promoting oxidation, p-xylene, continuous experiment, simulation

中图分类号:

TQ031.7

尚建平, 吴承洋, 赵玲, 孙伟振, 袁渭康. 二氧化碳协助强化对二甲苯氧化的连续过程实验与模拟[J]. 化工学报, 2015, 66(8): 2968-2975.

SHANG Jianping, WU Chengyang, ZHAO Ling, SUN Weizhen, YUAN Weikang. Continuous experiment and simulation of p-xylene oxidation promoted by CO₂[J]. CIESC Journal, 2015, 66(8): 2968-2975.

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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 CO₂

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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 CO2

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Continuous experiment and simulation of p-xylene oxidation promoted by CO₂