文献类型：期刊文献

英文题名：Kinetic Modeling of Liquid Phase Oxidation of 2,6-Dimethylnaphthalene to 2,6-Naphthalenedicarboxylic Acid

作者：Chen, Lejian[1];Wang, Shuangfu[1];Li, Yudong[1];Sun, Weizhen[1];Zhao, Ling[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：63

期号：24

起止页码：10571

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20242316220331);WOS:【SCI-EXPANDED(收录号:WOS:001239415100001)】；

基金：The financial support by China National Petroleum Corporation is gratefully acknowledged.

语种：英文

外文关键词：Activation energy - Free radicals - Kinetic parameters - Kinetic theory - Optimization - Oxidation - Rate constants - Reaction intermediates - Solvents

摘要：2,6-Naphthalenedicarboxylic acid (2,6-NDA) is an important monomer for high-performance polyester materials. In this work, 2,6-NDA was prepared through liquid phase oxidation of 2,6-dimethylnaphthalene (2,6-DMN) using Co/Mn/Br as catalysts, acetic acid/water as solvents, and air as oxidant. The effects of catalysts, temperature, and water content on oxidation kinetics were investigated. Based on the free radical chain reaction mechanism, a simplified kinetic model was developed, which involves 2,6-DMN, 2,6-NDA, and other important intermediates. Model fitting results show that the kinetic model fits experimental data well under the conditions of various catalysts, temperatures, and solvent compositions. It was found that rate constants k(2) through k(9) regarding to chain propagation and termination are independent of catalyst and solvent compositions due to the absence of catalyst and water in these steps. These reaction steps show to be insensitive to temperatures within a certain range due to a very low reaction activation energy of the reactions between peroxy-radicals and alpha-carbon atoms. Hopefully, the model fitting results obtained in this work can provide valuable insights into the industrial reactor design and process optimization of the liquid phase oxidation of 2,6-DMN.