低硅铝比ZSM-48分子筛合成及其正构十二烷临氢异构催化性能研究  

Synthesis and hydroisomerization performance of n-C12 over ZSM-48 molecular sieve with low silicon-aluminum ratio

作　　者：向江南 刘伟 刘成连 王琰[1] 陈树伟[1] 毕士楠 范彬彬[1] 李瑞丰[1] XIANG Jiang-nan;LIU Wei;LIU Cheng-lian;WANG Yan;CHEN Shu-wei;BI Shi-nan;FAN Bin-bin;LI Rui-feng(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学化学化工学院

出　　处：《燃料化学学报》2020年第1期83-90,I0006,共9页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21978192);山西省应用基础研究项目面上青年基金(201701D221040);山西省重点研发项目(201903D121036)资助~~

摘　　要：通过静态水热合成法,溴化六甲二铵作为结构导向剂合成出系列低硅铝比的ZSM-48沸石分子筛(Si/Al<100),所合成样品中最低硅铝比为38.6(ICP-AES),这将拓宽ZSM-48高硅沸石分子筛的应用范围。制备Pt负载双功能催化剂,用于正构十二烷临氢异构催化反应。结果表明,硅铝比的改变可以影响催化剂的活性,投料硅铝比为70的双功能催化剂具有最优的催化性能,但硅铝比改变对异构产物的分布没有明显的影响,其异构产物以支链在中间位的异构体为主。A series of ZSM-48 zeolites with low Si/Al ratios(Si/Al<100)were synthesized by hydrothermal synthesis method using hexamethydiammonium bromide as the structure directing agent.ICP-AES results showed that the Si/Al ratio of the synthesized sample was as low as 38.6,indicating the zeolite could be widely used.Pt supported on ZSM-48 with different Si/Al ratios were used for n-paraffin hydroisomerization.The catalytic reaction results showed that Pt/HZSM-48 with Si/Al ratio of 70 exhibited the best catalytic performance.However,the distribution of isomers had not been affected by Si/Al ratio of the ZSM-48,and the central-branched isomers were the main hydroisomerization products.

关 键 词：ZSM-48分子筛 低硅铝比 正构十二烷 临氢异构化 双功能催化剂 

分 类 号：O530.47[理学—等离子体物理]