直馏汽油在纳米ZSM-5上的异构化反应研究  

ISOMERIZATION OF STRAIGHT RUN GASOLINE OVER NANOSIZED HZSM-5

作　　者：程晓晶[1] 程伟[1] 王雪枫[1] 

机构地区：[1]新疆大学石油与天然气精细化工教育部重点实验室,乌鲁木齐830046

出　　处：《石油炼制与化工》2013年第7期48-52,共5页Petroleum Processing and Petrochemicals

基　　金：新疆大学石油天然气精细化学品实验室开放课题(XJDX0908-2010-02);新疆大学博士启动基金(BS100112)

摘　　要：在固定床反应器中研究了不同反应条件下纳米HZSM-5和微米HZSM-5在直馏汽油异构化反应中的催化性能,并对纳米HZSM-5和微米HZSM-5进行了XRD、NH3-TPD及低温N2吸附等表征。结果表明:纳米HZSM-5粒径小、外表面酸量丰富、扩散路径短,直馏汽油异构化反应性能优于微米HZSM-5,具体表现在环烷烃和芳烃的生成量大。由于纳米颗粒之间的二次孔可以大量容纳积炭,纳米HZSM-5的稳定性好;当反应温度为320～360℃、质量空速为1h-1时,纳米HZSM-5的催化性能最佳。This paper introduces the performance of nanosized HZSM-5 and micronsized HZSM-5 in straight-run gasoline isomerization in a fixed bed under reaction conditions.The characterization of two molecular sieves were conducted by XRD,NH3-TPD and BET analysis.It is found that the nanosized HZSM-5 is more suitable for catalytic isomerization of straight-run gasoline than micronsized HZSM-5.This is because nanosized HZSM-5 has more external acid sites which favor the cyclization of paraffin and riches in secondary pores allowing more coke deposition.At 320—360 ℃ and WHSV of 1 h-1,nanosized HZSM-5 shows the best catalytic performance.Nanosized HZSM-5 can be used as an efficient catalyst for straight-run gasoline isomerization.

关 键 词：纳米HZSM-5 微米HZSM-5 直馏汽油 异构 

分 类 号：TE626.21[石油与天然气工程—油气加工工程]