Zr-ZSM-5/SBA-15催化氧化-萃取模拟油脱硫性能研究  

Oxidation-Extraction Desulfurization of Model Oil Over Zr-Containing ZSM-5/SBA-15 Composite Molecular Sieves

作　　者：蔡天凤[1] 李会鹏[1] 赵华[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《石油化工高等学校学报》2013年第2期29-33,39,共6页Journal of Petrochemical Universities

基　　金：辽宁省博士启动基金资助项目(20081104)

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-15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500μg/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%。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 ZSM-5, 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 ~g/g） was investigated by the proportion of Zr ion, reaction temperature, reaction time and so on. The desulfurization rate is 84. 560/oo 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.

关 键 词：ZSM-5/SBA-15复合分子筛 氧化脱硫 萃取 

分 类 号：TE624.1[石油与天然气工程—油气加工工程] TQ016[化学工程]