摘要
甲醇制芳烃工艺产物成分复杂、对二甲苯含量低,耦合芳烃间转化技术能提升对二甲苯收率,但存在多组分匹配复杂、耦合非线性的难题。本文通过梳理5类反应产物集总与6种转化技术之间的对应、竞争、共生和协同关系,构建超结构模型并将之转化为非线性规划方程进行求解,提出甲醇制芳烃和芳烃间转化技术的高效耦合方法,揭示了反应产物和转化技术的多组分协调匹配机制,实现了组分中碳氢元素向对二甲苯的定向转化,为甲醇制对二甲苯的高效发展提供了思路。
The conversion of methanol to aromatics faces challenges in terms of complex product composition and low product yield.Integrating interaromatics conversion techniques can improve the overall conversion efficiency of methanol to aromatics,but they still suffer from the complicated multi-component matching mechanisms and coupling nonlinearity.Herein,the corresponsive,competitive,symbiotic and cooperative relations between 5 types of reaction products lumped(benzene,toluene,xylene,C9 and C10)and 6 kinds of conversion techniques(alkyl transfer of benzene with heavy aromatic hydrocarbons,toluene selective disproportionation,toluene methanol methylation,toluene disproportionation and alkyl transfer,xylene isomerization and heavy aromatics lightening processes)were studied.A superstructure model of the reaction products and conversion techniques was constructed to uncover all plausible paths,which involve component species and distribution,technique types and size,and connecting forms.The superstructure model is further converted into nonlinear programming equations in order to identify the optimal solution through computation.Based on the optimal path identified,an efficient coupling method for the conversion of methanol to aromatics was proposed and the multi-component coupling mechanism of reaction products and conversion techniques revealed.This resulted in the direct conversion of hydrocarbon elements sourced from reaction products to p-xylene and improvement of the product yield.Finally,it was shown that the yield of p-xylene could be increased from 12.73% to 44.47% with the aid of the proposed method.
作者
赵志仝
李悦
任卫桐
郝盼
ZHAO Zhitong;LI Yue;REN Weitong;HAO Pan(Shanxi Key Laboratory of Chemical Product Engineering,College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第4期503-509,共7页
Journal of East China University of Science and Technology
基金
山西省自然科学基金青年科学研究项目(20210302124465)
太原理工大学2022年校青年基金(2022QN060)。
关键词
对二甲苯
超结构模型
非线性规划方程
甲醇制芳烃
芳烃间转化
p-xylene
superstructure model
nonlinear programming equation
methanol to aromatics
interaromatic conversion technology
