Abstract: By using P123 as the sole template and under hydrothermal condition, the ZSM5/SBA15 composite molecular sieves were prepared by postsynthesis method. Catalyst was prepared by loading different ratio of ZrSO₄ on the carrier and characterized by means of XRD、BET and N₂ adsorptiondesorption. The results show that the composite molecular sieve exhibited the properties of both mesoporous SBA15 and microporous ZSM5, the introduction of appropriate amount of ZrSO₄ may not change the structure of the composite molecular sieve, but the intensity of diffraction peaks decreased. The oxidative desulfurization of model oil (500 μg/g) was investigated by the proportion of Zr ion, reaction temperature, reaction time and so on. The desulfurization rate is 84.56% under the optimal conditions: 30 mL of oil, 0.08 g of tetrabutyl ammonium bromide as phase transfer catalyst, reaction temperature of 50 ℃, reaction time of 120 min, catalyst to oil ratio (mass ratio of the catalyst and model oil) of 1∶40 and the volumn ratio of hydrogen peroxide and oil of 0.02.

Key words: ZSM5/SBA15 Composite molecular sieve,    ,  Oxidative desulfurization,    , Extraction

摘要： 以P123为模板剂,在水热条件下采用后合成法制备了ZSM-5/SBA-复合分子筛,以其为载体,负载不同比例的硫酸锆制备催化剂,并进行XRD、BET、N2 吸附-脱附表征。结果表明,复合分子筛同时具有介孔分子筛SBA-15和微孔ZSM-5型沸石的特点。适量硫酸锆的引入并没有改变复合分子筛的结构,但其衍射峰的强度有所降低。以硫质量分数为500ug/g模拟油进行氧化脱硫实验,考察了Zr离子负载比例、反应温度、反应时间、氧化剂用量等工艺条件对脱硫率的影响。结果表明,Zr(20%,质量分数)-ZSM-5/SBA-15催化效果最好,在模拟油体积为 30mL的条件下,0.08g四乙基溴化铵,反应温度50 ℃,反应时间120min,剂油质量比为1:40,V (H2O2)/V (油) 为0.02时脱硫率可达84.56%。

关键词: ZSM-5/SBA-15复合分子筛 , 氧化脱硫 , 萃取