FCC汽油加氢脱硫及芳构化催化剂的设计与验证

分析了FCC汽油中各种烯烃的加氢饱和对汽油辛烷值的影响，其中支链化程度不高且碳数大于6的烯烃的加氢饱和是FCC汽油加氢后辛烷值降低的主要原因。探讨了提高FCC汽油辛烷值的各种反应，提出了在研制FCC汽油加氢脱硫催化剂时，应考虑催化剂的异构化、芳构化、氢转移、烷基化和选择性裂化等功能；通过提高烯烃和烷烃的支链化度，将部分烯烃转化为高辛烷值的芳烃，或将低辛烷值的正构烃类选择性异构等措施，达到保持加氢FCC汽油辛烷值的目的，并对研制的催化剂进行了验证。

DESIGN AND EXPERIMENTAL CONFIRMATION OF CATALYSTS FOR HYDRODESULFURIZATION & AROMATIZATION OF FCC GASOLINE

The influences of olefin saturation on octane number of FCC gasoline in hydrotreating process were discussed.The main reason for the octane number loss of hydrotreated FCC gasoline was the saturation of low branched chain C_(6+) olefins.The reactions,enhancing octane number of FCC gasoline,were discussed.Besides the hydrodesulfurization activity,the catalyst should have the catalytic activities of isomerization,aromatization,hydrogen transfer,alkylation and selective cracking.By means of increasing the branched chain of olefin and alkane,converting olefin to aromatics and selective isomerization of the normal paraffins,the octane number of hydrotreated FCC gasoline could be maintained.The catalytic performance of developed catalyst was experimentally confirmed as well.