异丁烷脱氢反应体系的热力学分析  

Thermodynamic analysis of dehydrogenation reaction of isobutane

作　　者：付云芝[1] 徐源铭 卓润生[1] 

机构地区：[1]海南大学海南省石油化工检测技术重点实验室,海南海口570228

出　　处：《中国石油大学学报（自然科学版）》2014年第3期154-156,共3页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(51263006/E031301);海南省自然科学基金项目(211009)

摘　　要：对异丁烷脱氢反应体系中脱氢反应和裂解反应进行热力学计算,得到脱氢反应和裂解反应在温度298～900 K的标准摩尔反应焓变、标准吉布斯自由能变和标准平衡常数值,对不同温度、不同压力对脱氢反应和裂解反应的影响进行分析,绘制平衡转化率随温度、压力的变化曲线.结果表明：异丁烷平衡转化率随温度的升高而增大,随反应压力的增加而减小;计算得到的数据可作为异丁烷脱氢生产异丁烯的依据.Thermodynamic calculations of isobutane dehydrogenation and side cracking reaction were carded out.The thermodynamic data including enthalpy （ΔrHm）,Gibbs energy（ΔrGm）,and equilibrium constant of reaction at 298-900 K were obtained.The influences of isobutane dehydrogenation and cracking reaction at different temperatures and pressures were analyzed.The correlation curves between equilibrium conversion of isobutane dehydrogenation and reaction conditions,such as temperature and pressure,were plotted.It is found that the conversion rate of isobutane increases with the rise of temperature,while it decreases with the rise of reaction pressure.The calculated data can be applied to guide the production of isobutene by isobutane dehydrogenation.

关 键 词：异丁烷 脱氢反应 裂解反应 热力学 

分 类 号：O642.1[理学—物理化学]