文献类型：期刊文献

英文题名：Reaction kinetics of the production of polyoxymethylene dimethyl ethers from methanol and formaldehyde with acid cation exchange resin catalyst

作者：Zhang, Jianqiang[1];Shi, Minhao[1];Fang, Dingye[1];Liu, Dianhua[1]

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

年份：2014

卷号：113

期号：2

起止页码：459

外文期刊名：REACTION KINETICS MECHANISMS AND CATALYSIS

收录：;EI(收录号：20150100398176);WOS:【SCI-EXPANDED(收录号:WOS:000344811200011)】；

语种：英文

外文关键词：Methanol; Formaldehyde; Polyoxymethylene dimethyl ether; Kinetic

摘要：The synthesis of polyoxymethylene dimethyl ethers (PODEn) from methanol and formaldehyde was studied in a fixed bed reactor over the strong acid cation exchange resin catalyst. First, the influence of operating parameters such as temperature and WHSV on reactions was investigated. The conversion of methanol and formaldehyde was improved by increasing temperature. Second, a kinetic equation was derived to estimate the reaction rate constant of methanol and formaldehyde towards PODE. The reaction rate and kinetic model with six PODEn-synthesis reactions was established. We used a fourth order Runge-Kutta method and quasi-Newton method to solve the kinetic equations. The values of apparent activation energies of the six reactions are between 38.58 and 43.68 kJ mol(-1). Ultimately, a mechanism was proposed to explain the results of apparent activation energy. The rate equations that were developed could predict the behavior of the synthesis of PODEn from methanol and formaldehyde reasonably well.