甲醇与正己烷耦合芳构化流程模拟及分析  

Simulation and analysis of coupling aromatization process of methanol and n-hexane

作　　者：杨丽娜[1] 王兴宇 魏永峰 李剑[1] YANG Lina;WANG Xingyu;WEI Yongfeng;LI Jian(College of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China;PetroChina Fushun Petrochemical Company,Fushun 113000,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]中国石油抚顺石化分公司,辽宁抚顺113000

出　　处：《石油化工》2025年第3期348-354,共7页Petrochemical Technology

基　　金：辽宁省高等学校杰出青年学者成长计划(LJQ2015062);辽宁省科学技术厅项目(20170540585);辽宁省教育厅项目(L2015296,L2016018)。

摘　　要：以甲醇与正己烷耦合芳构化工艺为研究对象、以甲醇和正己烷的转化率和产物分布为指标,采用单因素分析法对甲醇与正己烷耦合芳构化反应进行了实验研究;并采用Aspen Plus流程模拟软件自带的灵敏度分析功能,对萃取精馏塔和苯、甲苯、二甲苯精馏塔进行了模拟优化。模拟结果表明,最优反应条件为进料比m(甲醇)∶m(正己烷)=3∶1、反应温度420℃、反应压力0.5 MPa、WHSV=2.0 h^(-1);萃取精馏塔的最优塔板数为34、回流比为0.6、进料位置在第17块塔板、NFM加入位置在第4块塔板;苯、甲苯、二甲苯精馏塔的最优塔板数分别为42,41,24,回流比分别为21.0,6.5,3.0,进料位置分别为17,24,14;优化后苯、甲苯、二甲苯产品的纯度分别达到了99.14%,99.92%,99.64%(w),均达到合格品要求。Coupling aromatization of methanol and n-hexane was studied through single-factor analysis with the coupling aromatization process as the research object and the conversion of methanol and n-hexane and the product distribution as the indicators.The sensitivity analysis function integrated within Aspen Plus was utilized to conduct simulation optimization for both the extractive distillation column and the benzene,toluene,and xylene distillation column.According to simulation results,the optimal reaction conditions are determined to be a feed ratio of m(methanol)∶m(n-hexane)3∶1,a reaction temperature of 420℃,a reaction pressure of 0.5 MPa,and a WHSV of 2.0 h^(-1).As for the extractive distillation column,the optimal conditions include 34 trays,a reflux ratio of 0.6,a feed stage at the 17th tray,and an NFM introduction position at the 4th tray.As for the benzene,toluene,and xylene distillation column,the optimal tray numbers are 42,41,and 24,respectively,with corresponding reflux ratios of 21.0,6.5,and 3.0,and feed stages at the 17th,24th,and 14th trays,respectively.After optimization,the purity of the benzene,toluene,and xylene products reaches 99.14%,99.92%,and 99.64%(w)respectively,all meeting the requirements for qualified products.

关 键 词：甲醇 正己烷 耦合芳构化 Aspen Plus 灵敏度分析 

分 类 号：TQ018[化学工程]