Al_2O_3孔结构对纳米HZSM-5基催化剂改质FCC汽油性能的影响  

Effects of Al_2O_3 pore structure on FCC gasoline upgrading properties of the nanosized HZSM-5 based catalysts

作　　者：赵晓波[1] 王文举[1] 郭新闻[2] 王祥生[2] 

机构地区：[1]白城师范学院化学学院,吉林白城137000 [2]大连理工大学精细化工国家重点实验室,辽宁大连116012

出　　处：《燃料化学学报》2013年第11期1343-1348,共6页Journal of Fuel Chemistry and Technology

基　　金：中国石油天然气股份有限公司FCC汽油改质催化剂及工艺研究项目(20090392);吉林省教育厅"十二五"科学技术研究项目(吉教科合字[2012]第364号)

摘　　要：采用NH3-TPD、FT-IR、N2吸附-脱附等手段对两种不同来源的氧化铝样品进行了表征。结果表明,两种Al2O3的总酸量及酸强度没有明显差别,酸类型均以Lewis酸为主,其中,Al2O3(b)的平均孔径及孔体积较大。在固定床微型反应装置上考察了以两种Al2O3为载体制备的纳米HZSM-5基催化剂改质全馏分FCC汽油的性能。实验结果表明,以大孔Al2O3为载体的HZSM-5基催化剂具有较好的降烯烃、芳构化、异构化活性及稳定性。改性纳米HZSM-5负载的LaNiMo催化剂对FCC汽油的300 h评价结果表明,烯烃饱和率为83%,脱硫率为87%,同时维持了油品的辛烷值。Two A1203 supports were characterized by means of NH3-TPD, FT-IR and N2 adsorption-desorption. The characterization results showed that the two A1203 supports have no significant differences in their total acidity and acidity strength. The acid sites are mainly Lewis ones, but A1203 （b） has larger average pore diameter and pore volume than A1203（a）. The influence of the pore structures of the A1203 supports on the full range FCC gasoline upgrading performance of the nanosized HZSM-5 based catalysts was investigated in a fixed- bed reactor. The results indicated that the HZSM-5 catalyst extruded with macroporous A1203 exhibited superior activity, stability and performance in reducing olefin content of FCC gasoline. The modified nanosized LaNiMo/ HZSM-5 catalyst reduced olefin and sulfur concentration in FCC gasoline by about 83% and 87% within 300 h time on stream, respectively, meanwhile the gasoline octane number was preserved.

关 键 词：Al2O3载体 纳米HZSM-5 催化裂化汽油 辛烷值 

分 类 号：O643.36[理学—物理化学]