不同温度区间碳四烯烃催化裂解制丙烯的反应规律  

Reaction of Performances on C_4-Olefin Catalytic Cracking to Propylene under Different Temperatures

作　　者：任丽萍[1] 滕加伟[1] 赵国良[1] 谢在库[1] 

机构地区：[1]中国石油化工股份有限公司上海石油化工研究院,上海201208

出　　处：《化学反应工程与工艺》2015年第1期85-90,共6页Chemical Reaction Engineering and Technology

基　　金：国家重点基础研究发展计划(973计划)(2009CB623504)

摘　　要：为了研究碳四烯烃催化裂解的宏观反应规律,对该反应体系在不同温度下的反应情况进行了详细研究,归纳出了不同温度下各种反应发生的规律。按照不同温度下的主导反应及其发生的程度,将碳四烯烃的反应情况划分为三个区域：300-400℃聚合反应程度大于裂解反应,而且会发生裂解小分子产物的二次聚合;400℃时聚合和裂解反应的程度相当,没有二次聚合反应发生;400-650℃时裂解程度加大,裂解反应大于聚合反应,裂解产生的大分子产物会发生二次裂解。因此,高温更有利于裂解,在降低自由基反应发生的情况下,将会使裂解反应的效率大大提高。For researching macroscopic reaction rule of C4-olefin catalytic cracking reaction, the performances of various reactions at different temperatures were investigated in detail. According to the experimental results, reaction performance of C4-olefin was divided into three districts by the dominant reaction and the reaction degree at different temperature. From 300 ℃ to 400 ℃, the dominant reaction was polymerization and the secondary polymerization of the small molecule from cracking was also occurred. The degree of polymerization and cracking reaction was equivalent and no secondary polymerization happened at 400 ℃. From 400 ℃ to 650 ℃, degree of cracking increased and exceeded polymerization reaction. Otherwise, secondary cracking of the big molecule from cracking was occurred. It could concluded that improving reaction temperature make for the reaction of C4-olefin cracking to propylene in case of few free radical reaction.

关 键 词：碳四烯烃 丙烯 催化裂解 聚合 

分 类 号：O643.32[理学—物理化学]