Fundamental kinetics model of acidity-activity relation for ethylene oligomerization and aromatization over ZSM-5 zeolites

被引：30

作者：

Jin, Fang ^{[1
]}

Zhang, Peng ^{[1
]}

Wu, Guiying ^{[1
]}

机构：

[1] Sch Chem Engn & Pharm, Wuhan Inst Technol, Key Lab Green Chem Proc,Minist Educ,Sch Chem Engn, Hubei Key Lab Novel Reactor & Green Chem Technol, Wuhan 430205, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2021年 / 229卷 / 229期

基金：

湖北省教育厅重点项目;

关键词：

Kinetics model; Acid strength; ZSM-5; Oligomerization; Aromatization; Linear free-energy theory; COMPUTER-GENERATION; OLEFINS PROCESS; RATE-EQUATIONS; PART; HYDROCRACKING; METHANOL; CRACKING; HYDROISOMERIZATION; PARAMETERS; CATALYSIS;

D O I：

10.1016/j.ces.2020.116144

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetics of ethylene oligomerization and aromatization (OA) over ZSM-5 with different Si/Al ratios was modeled by applying single-event concept combined with Bronsted kinetic model to establish a quantitative acidity-activity relationship. The NH3 desorption activation energy was related to the activation energy of the OA reactions and heat of de/protonation based on linear free-energy theory by introducing c and d as kinetics parameters for assessing the sensitivity of the OA reactions to the acid strength. A total of 36 parameters was estimated for the subtype elementary steps in each kinetics model. A hybrid genetic optimization algorithm was generated to obtain the kinetics model parameters, where the model can efficiently and accurately fit the changes in the product distribution obtained with the three catalysts for products in the reaction network. The regressed kinetics model can predict the influence of zeolites with the same topology and different acidity on the product distribution. (c) 2020 Elsevier Ltd. All rights reserved.

引用

页数：16

共 49 条

[1] FUNDAMENTAL KINETIC MODELING OF HYDROISOMERIZATION AND HYDROCRACKING ON NOBLE-METAL-LOADED FAUJASITES .1. RATE PARAMETERS FOR HYDROISOMERIZATION [J].