直馏柴油催化氧化-萃取脱硫实验研究

采用催化氧化-萃取的方法对直馏柴油进行脱硫实验研究，对催化剂和萃取剂进行评选，并考察催化氧化反应条件对脱硫效果的影响。结果表明：选用醋酸钴为催化剂、空气为氧化剂、糠醛为萃取剂，在30 mL直馏柴油中加入醋酸钴催化剂0.4 g，在反应温度为50 ℃、反应时间为60 min、搅拌转速为600 r/min、萃取剂与柴油体积比为0.2、3级萃取的条件下，对直馏柴油进行催化氧化-萃取脱硫，精制柴油的硫质量分数由215 μg/g降低至约30 μg/g，脱硫率达到86%，满足欧Ⅳ排放标准要求。

EXPERIMENTAL STUDY ON CATALYTIC OXIDATION-EXTRACTION DESULPHURIZATION OF STRIGHT-RUN DIESEL

The desulphurization of straight-run diesel fraction was studied in laboratory by catalytic oxidation-extraction method,including the selection of catalyst and extractant,the effect of catalytic oxidation conditions on the sulfur removal rate.Test results showed that using cobalt acetate as catalyst,air as oxidant and furfural as extractant,when treating 30 mL straight-run diesel under the conditions of a catalyst dosage of 0.4 g,a reaction temperature of 50 ℃,a reaction time of 60 min,a stirring speed of 600 r/min,an extractant to oxidized diesel volume ratio of 0.2 and using 3-stage extraction,the sulfur content of the refined diesel dropped from 215 μg/g to about 30 μg/g(a sulfur removal rate of 86%),which well met the requirement of Europe Ⅳ Emission Standard.