WO3-SBA-15/ZSM-5的制备及催化氧化-萃取脱硫性能研究

在水热条件下采用后合成法制备SBA-15/ZSM-5复合分子筛，并以其为载体，负载钨酸对其改性，制备WO3(钨质量分数为10％)-SBA-15/ZSM-5催化剂，进行XRD、SEM、N2吸附-脱附表征。结果表明，钨酸均匀负载在SBA-15/ZSM-5复合分子筛上，同时具备介孔SBA-15和微孔ZSM-5的性质。以正辛烷-噻吩为模型油进行催化氧化-萃取脱硫实验，对相转移催化剂、萃取剂、转速进行考察。研究表明，模型油20 mL，剂油比1:70(催化剂与模型油的质量比)，反应温度70 ℃，反应时间120 min，0.08 g四丁基溴化铵，转速为300 r/min，复合萃取剂为二甲基亚砜和水，此时脱硫率可达到85.48％。

OXIDATION-EXTRACTION DESULFURIZATION OF MODEL OIL OVER WO3-CONTAINING SBA-15/ZSM-5 COMPOSITE MOLECULAR SIEVE CATALYST

The SBA-15/ZSM-5 composite molecular sieves were prepared by post-synthesis method under hydrothermal condition. The WO3-SBA-15/ZSM-5 catalyst was prepared by loading H2WO4, on the carrier and characterized by means of XRD、SEM、and N2 adsorption-desorption. The results showed that the H2WO4 has achieved a uniform distribution on composite molecular sieves that exhibited the properties of both mesoporous SBA-15 and microporous ZSM-5. The effects of phase transfer catalyst, extraction agent, rotate speed on the desulfurization rate are investigated by the catalytic oxidative desulfurization method using model oil as raw materia1. The desulfurization rate is 85.48％ under the optimal conditions：20 mL of oi1, reaction temperature of 70 ℃, reaction time of 120 min, 0.08 g of tetrabutyl ammonium bromide, rotate speed of 300 r/min, dimethyl sulfoxide and water as complex extracting agent.