降低FCC汽油硫含量的催化裂化催化剂评价

EVALUATION OF CATALYTIC CRACKING CATALYST FOR REDUCING SULFUR CONTENT IN GASOLINE

提出了在催化裂化过程中进行汽油催化脱硫的技术路线 ,研制出催化裂化汽油脱硫催化剂DS Z3。以减压蜡油为原料 ,在固定流化床反应装置上对其性能进行了评价。结果表明 ,该催化剂不管是作为催化裂化催化剂单独使用 ,还是与普通的FCC催化剂混合使用 ,都具有明显的脱硫效果 ,并能不同程度地提高汽油和C3 +C4的收率。此外 ,使用催化裂化脱硫催化剂DS Z3还可以使汽油在烯烃含量下降的同时 ,辛烷值有所增加。

A scheme for reducing the sulfur content of gasoline in catalytic cracking process is proposed, and the catalytic cracking catalyst DS Z3 for removing sulfur from FCC gasoline is developed. The desulfurization effect of catalyst is evaluated on a fluidized bed apparatus. Under appropriate ratio of DS Z3 to FCC catalyst and reaction conditions, over 30% sulfur can be reduced in comparison with only FCC catalyst being applied, and the yield of gasoline as well as the yield of C 3+C 4 can be improved simultaneously. The DS Z3 catalyst has excellent propreties of desulfurization and hydrocarbon cracking activity. The alkene content in gasoline can be reduced, and its octane number can be raised by adding DS Z3 catalyst in catalytic cracking process.