催化裂化汽油芳构化降烯烃催化剂的改进研究

针对催化裂化汽油加氢脱硫降烯烃组合工艺技术中，芳构化降烯烃辛烷值恢复催化剂（M）应用于重馏分汽油加氢时，存在因反应温度高而影响催化剂长周期运行及液体总收率等问题，对催化剂进行了优化升级改进研究，在M催化剂的基础上，通过对HZSM-5分子筛原料改进及调变活性金属组分，研制出活性高、稳定性好的催化裂化重汽油芳构化降烯烃辛烷值恢复催化剂M -Ⅱ。催化剂的活性评价结果表明，与M催化剂相比，在烯烃降低幅度大致相当的情况下，采用M -Ⅱ催化剂时，芳烃含量增加1.3百分点，RON提高0.7个单位。

IMPROVEMENT OF AROMATIZATION AND OLEFIN-REDUCTION CATALYST FOR FCC HEAVY GASOLINE

The aromatization and olefin-reduction catalyst M had been applied in commercial unit for desulfurization and olefin-reduction process of FCCG heavy fraction. To overcome the shortcomings of lower liquid yield and shorter cycle length at higher reaction temperature, a series of modification procedures were taken to improve the activity and stability of the catalyst M. A modified catalyst M-II was then successfully developed by improving manufacture of HZSM-5 and the ratio of the active metals. The results of the performance test of M-II, compared with that of catalyst M, show that aromatics increases more than 1.3 % and RON is 0.7 higher than M at the close reduction level of olefin.