摘要
考察了甲醇乙烯烷基化反应体系各独立反应吉布斯自由能随温度变化情况,采用吉布斯自由能最小法计算得到不同反应条件下体系平衡组成。结果表明:该反应体系主要受动力学控制;适当升高温度有利于烯烃生成,且乙烯和丁烯的生成是丙烯生成反应的阻碍点;在只生成丙烯的极端情况下,单独考察生成丙烯的反应,为了提高丙烯产率,需要适当降低反应温度,若综合考虑设备和能耗等因素,体系存在最佳反应压力和进料比(乙烯与甲醇摩尔比)。
The standard Gibbs free energy of the independent reaction in alkylation reaction of methanol and ethylene changing with temperature was investigated.The equilibrium composition of the system at different conditions was calculated by Gibbs free energy minimization method.The results show that the reaction system is mainly controlled by kinetics;properly rising the temperature is in favor of forming olefins,and the production of ethylene and butylene is the hampered point for propylene formation;the reaction of propylene was investigated individually under the extreme condition that only propylene was formed.Lowering the temperature properly is reqiured for increasing propylene yield.In addition,taking the equipment and energy consumption factors into consideration,the optimum reaction pressure and feed ratio（C2H4/CH3OH） exist in the system.
出处
《化学工程》
CAS
CSCD
北大核心
2010年第11期64-67,共4页
Chemical Engineering(China)
关键词
甲醇制丙烯
烷基化
热力学
methanol to propylene
alkylation
thermodynamics
