FCC汽油烷基化脱硫的中试研究

摘要

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-Ⅰ catalyst to process 27.5 L gasoline feedstock, the sulfur content of treated gasoline was 191 μg/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 142 μg/g, meeting the sulfur requirement of National Standard for Automobile Gasoline Ⅲ.As compared with HDS process, this process is simple, easy to operate, less octane loss, lower investment/operation cost and lower energy consumption.%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 h1的条件下,100 mL催化剂SW-1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.