烯烃催化裂解的反应行为Ⅰ.烯烃裂解的反应速率和产物分布

 采用脉冲微反装置，研究了不同骨架结构的C₅~C₈单体烯烃在催化裂解反应条件下的裂解行为。通过改变催化剂装填量，测定了不同温度下烯烃的反应速率和产物分布。研究表明，脉冲条件下烯烃裂解反应为一级反应，其裂解速率随其分子中碳原子数的增加而大幅增加，烯烃-1的催化裂解速率是相同碳数的2-甲基烯烃-2裂解速率的1.4~1.6倍，但这2种结构的烯烃在相同反应条件下的裂解产物分布和丙烯选择性基本相同。

CRACKING PERFORMANCE OF OLEFINS ON ZEOLITE CATALYSTⅠ. Cracking Reaction Rate and Product Distribution

The cracking performances of C₅～C₈ olefins on zeolite catalyst were studied by using a pulse micro-reactor. By changing the catalyst load in reactor, the kinetic parameters, reaction rate and product distribution, of olefin cracking reaction were obtained at different reaction stage and temperature. The experimental results showed that the catalytic cracking reaction of olefins at pulse conditions could be represented as one order reaction model, and the olefin cracking rate increased dramatically with carbon number in its molecule. The cracking rate of olefin-1 was 1.4—1.6 times faster than that of 2-methy-olefin-2 with the same carbon number. The propylene selectivity and product distribution of the different kind structure olefins with the same carbon number were approximately equal under the same cracking reaction conditions.