FCC汽油烷基化脱硫的中试研究

针对加氢脱硫技术(HDS)存在的操作条件苛刻、装置投资及操作费用高等缺点，无锡蓝星石化公司与西南石油大学合作，采用后者研制的催化剂SW-Ⅰ对无锡蓝星石化公司FCC汽油进行烷基化脱硫中试试验研究。在SW-Ⅰ催化剂用量0.61%、反应温度60 ℃、压力0.5~0.8 MPa、空速3.77 h-1的条件下，100 mL催化剂SW-Ⅰ可处理原料油27.5 L，烷基化脱硫汽油的硫含量为191 μg/g、收率为87.90%，。将烷基化脱硫汽油与直馏汽油、C9芳烃以及MTBE按质量比67：15：10：8调合生产车用汽油，调合汽油RON为93.4，密度为0.721 5 g/cm3，硫含量为142 μg/g，硫含量符合国Ⅲ标准。与HDS相比，FCC汽油烷基化脱硫技术工艺流程简单、操作条件缓和、不损耗辛烷值、装置投资及操作费用低、能耗低，具有一定的工业应用前景。

PILOT PLANT TEST OF FCC GASOLINE DESULFURIZATION BY ALKYLATION

Since hydrodesulfurization（HDS） of FCC gasoline is a high investment and high operation cost process,a lower cost desulfurization process through alkylation was tested by Wuxi Bluestar Petrochemical Company and Southwest Petroleum University（SWPU）.A pilot plant test using SW-Ⅰcatalyst developed by SWPU and FCC gasoline from Wuxi Bluestar Petrochemical Company was presented. Test results showed that under the optimum conditions of a reaction temperature of 60℃,a pressure range of 0.5—0.8 MPa,a LHSV of 3.77 h^-1 and using 100 mL SW-℃catalyst to process 27.5 L gasoline feedstock,the sulfur content of treated gasoline was 191μg/g and the yield was 87.90%.The treated gasoline was blended with straight-run gasoline,C₉ aromatics and MTBE in the mass ratios of 67:15:10:8 to produce automobile gasoline.This gasoline product had a RON of 93.4,a density of 0.721 5 g/cm³ and a sulfur content of 142μg/g,meeting the sulfur requirement of National Standard for Automobile GasolineⅢ.As compared with HDS process,this process is simple,easy to operate,less octane loss,lower investment/operation cost and lower energy consumption.