苯与苯乙烯合成1，2-二苯乙烷反应的热力学分析  

Thermodynamic analysis of 1,2-diphenylethane synthesis from benzene and styrene translation reaction

作　　者：王万林[1] 史建公[2] 

机构地区：[1]河北北方学院应用化学研究所,河北张家口075000 [2]北京燕山集联化工公司,北京102500

出　　处：《计算机与应用化学》2008年第8期985-988,共4页Computers and Applied Chemistry

基　　金：张家口市科技攻关基金(051149).

摘　　要：分析和计算苯与苯乙烯烷基化合成1,2-二苯乙烷反应的热力学,对于开发该反应的催化剂和反应工艺具有重要意义。本文利用热力学基本原理,首次建立了该反应的焓变及Gibbs自由能变化与反应温度的关系,建立了反应的平衡常数与苯乙烯平衡转化率的关系。结果表明,在标准状态下,该反应的Δ_rH_m^0(298 K)=-87.088 KJ·mol^(-1),△_rG_m^0(298 K)=-46.496 kJ·mol^(-1),反应为强放热自发反应;降低反应温度和提高反应压力,有利于提高苯乙烯的平衡转化率。It plays a very important role in determining the reaction process conditions and selecting the catalyst to analyze and calculate the reaction thermodynamic data of 1,2-diphenylethane synthesis from benzene and styrene alkylation reaction. The relationship formula between A △rHm^0 ,△rGm^0 and the reaction temperature were established respectively, meanwhile, giving the equation between the equilibrium conversion of styrene and thermodynamic equilibrium constant according to the thermodynamic principles. The results shows that the △rHm^0（298K）=-87.088 kJ·mol^-1 and △rGm^0（298K）=-46.496 kJ·mol^-1 under the standard state. It indicates that the reaction is a strong exotic under the room temperature and the styrene equilibrium conversion increases along with the decreasing of the reaction temperature and the increasing of reaction pressure respectively.

关 键 词：1 2-二苯乙烷 热力学 苯 苯乙烯 

分 类 号：O631[理学—高分子化学]