化工学报Issue(2)：105-111,7.DOI:10.11949/j.issn.0438-1157.20141366
混合丁烯/异丁烷硫酸烷基化反应动力学
Alkylation kinetics of mixed butenes/isobutane by sulfuric acid
摘要
Abstract
The alkylation kinetics of isobutane with mixed butenes using sulfuric acid as catalyst was investigated by batch experiments at temperatures from 276.2 K to 285.2 K under the conditions of industrial interest. With the decrease of reaction temperature, both the production of main product trimethylpentanes (TMPs) and RON of alkylates increased, and byproducts dimethylhexanes (DMHs) changed a little, but heavy ends components (HEs) reduced significantly. By using the alkylation kinetics model based on the classic carbonium ion mechanism, the concentration profiles with time regarding three groups of key alkylates, including TMPs, DMHs, and HEs, were compared against experiments. The regression results showed that the kinetics model fitted experimental data very well. An anti-Arrhenius behavior was found in the chain initiation step of the addition reaction of H+to isobutene, and the apparent activation energies of itself and the reverse reaction were 45.14 kJ·mol−1 and 41.44 kJ·mol−1. The calculation of reaction rates of the TMPs+and DMHs+forming steps was added, and most of the reaction rates of chain transfer and chain termination reactions remained the same as those in literature.关键词
烷基化/混合丁烯/反应动力学/碳正离子/动力学模型/参数估值Key words
alkylation/mixed butenes/reaction kinetics/carbocation/kinetics modeling/parameter estimation分类
化学化工引用本文复制引用
李迪,孙伟振,奚桢浩,张明华,赵玲..混合丁烯/异丁烷硫酸烷基化反应动力学[J].化工学报,2015,(2):105-111,7.基金项目
国家自然科学基金联合基金项目（U1162202）；高等学校学科创新引智计划项目（B08021）；中国博士后科学基金面上项目（2012M512055）；宁夏自然科学基金项目（NZ13259）。 （）
