满足国Ⅵ标准的FCC汽油改质技术研究

摘要

Several applicable technologies for FCC gasoline upgrading based on its molecular constitutes are introduced.Upgrading of FCC gasoline to meet the specifications of Guo Ⅵ standard should be based on the oriented conversion of olefins,which can minimize the octane number loss while the olefin content is reduced.In these processes,the skeletal isomerization process has enhanced the catalyst isomerization performance and the pilot plant test results show that the RON loss is only 0.7 units for the selective hydrogenation of full range FCC gasoline;The integrated isomerization-etherification process for C5 conversion converts the n-alkene to isoalkene followed by methanol etherification to TAME,and the RON could be increased by 21 units as compared with n-alkene;The aromatization technology converts the olefins to aromatics with much higher octane number,and thus the reduction of the olefin contents and increase of the octane number can be achieved simultaneously.%介绍了3种基于汽油分子组成的催化裂化(FCC)汽油改质技术,以烯烃定向转化为基础,在降低FCC汽油烯烃含量的同时,最大限度减少辛烷值损失,使产品满足国Ⅵ汽油质量标准.其中,骨架异构技术以全馏分FCC汽油为原料,强化催化剂的异构化性能.中试结果表明,加氢条件下,在硫和烯烃含量达标的同时,RON损失仅0.7单位;异构-醚化组合技术以C5烯烃为原料,经异构化过程将其中的直链烯烃转化为叔碳烯烃,再与甲醇醚化生成甲基叔戊基醚(TAME),相比于正构烯烃,RON可提高21.1单位;芳构化技术将正构烯烃定向转化为辛烷值很高的芳烃产品,同时实现降低烯烃含量和提高辛烷值的目标.