流化催化裂化汽油改质和增产低碳烯烃的研究

Study on Catalytic Reformulation and Increasing Light Olefins of Fluid Catalytic Cracking Gasoline

采用GL型催化剂,在小型固定流化床实验装置上考察了反应温度、剂油比、空速和水油比等操作条件对流化催化裂化(FCC)汽油催化改质汽油的产品分布、低碳烯烃(丁烯、丙烯和乙烯)产率和族组成的影响。实验结果表明,在一定反应条件下,FCC汽油通过催化改质可以降低烯烃含量,提高芳烃含量和辛烷值,在满足新汽油标准的同时提高了低碳烯烃的产率。此外,较高的反应温度、剂油比和水油比以及较低的空速有利于FCC汽油催化改质和增产低碳烯烃。

The Effects of reaction temperature, mass ratio of catalyst to oil, space velocity and mass ratio of water to oil on product distribution, yields of light olefins （light olefins including ethylene, propylene and butylene） and composition of the fluid catalytic cracking （FCC） gasoline upgraded over the self-made catalyst GL in a confined fluidized bed reactor were investigated. The experimental results showed that FCC gasoline was obviously reformulated under appropriate reaction conditions. The olefins （olefins with C atom numbe above 4） content of FCC gasoline was markedly reduced, the aromatics content and octane number were increased. The upgraded gasoline met the new standard of gasoline, meanwhile, higher yields of light olefins were obtained. Furthermore, higher reaction temperature, higher mass ratio of catalyst to oil, higher mass ratio of water to oil and lower space velocity were beneficial to reaction of FCC gasoline reformulation and increasing light olefins.