催化裂解条件下丙烯的二次反应  

Secondary reaction of propylene under conditions of catalytic pyrolysis

作　　者：刘熠斌[1] 赵辉[1] 杨朝合[1] 山红红[1] 

机构地区：[1]中国石油大学重质油国家重点实验室,山东青岛266555

出　　处：《中国石油大学学报（自然科学版）》2009年第3期153-157,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(20490200);山东省科技专项课题(2006ZZ08)

摘　　要：在脉冲微反-色谱装置上考察了丙烯在催化裂解条件下的二次反应,并对反应路径进行分析。结果表明:低温、长反应时间有利于丙烯的转化,丙烯经过齐聚、裂化和歧化反应生成不同碳数的烯烃,经过环化脱氢以及氢转移生成芳烃和烷烃;丙烯在USY催化剂作用下的反应活性受温度影响更为显著;ZSM-5催化剂对丙烯的环化脱氢活性更高,而USY催化剂对丙烯的氢转移活性更高;在ZSM-5催化剂的作用下,芳烃主要是丙烯环化脱氢生成的,氢转移生成的芳烃较少。Secondary reaction of propylene under conditions of catalytic pyrolysis was investigated in pulsating reaction-chromatograph equipment, and the reaction path was analyzed. The results show that low temperature and long reaction time are advantageous to the propylene transformation. Propylene produced olefins with different carbon number by oligomerization, cracking and disproportionation reactions, and produced aromatics and paraffins by cyclization-dehydrogenation and hydrogen transfer reactions. Temperature effect on reactivity of propylene with USY catalyst is more remarkable. The cyclization-dehydrogenation activeness for propylene is higher with ZSM-5 catalyst, while the hydrogen transfer activeness for propylene is higher with USY catalyst. With ZSM-5 catalyst, cyclization-dehydrogenation for propylene is the dominant reaction, and hydrogen transfer is subsidiary reaction in the formation of aromatics.

关 键 词：丙烯 齐聚 歧化 芳构化 

分 类 号：O643.3[理学—物理化学]