金属改性缺陷型ZSM-5分子筛用于丙烷催化转化的研究  

Study on Catalytic Conversion of Propane on Metal Modified Defective ZSM-5 Zeolite

作　　者：王吉垒 孙博[3] 林龙[2] 周琳[2] 李佩儒[2] WANG Jilei;SUN Bo;LIN Long;ZHOU Lin;LI Peiru(Zhanjiang New Zhongmei Chemical Industries Co.,Ltd.,Zhanjiang Guangdong 524000,China;Sinopec Maoming PetrochemicaL Branch Company,Maoming Guangdong 525000,China;PetroChina Hohhot PetrochemicaL Branch Company,Hohhot Inner Mongolia 010000,China)

机构地区：[1]湛江新中美化工有限公司,广东湛江524000 [2]中国石油化工股份有限公司茂名分公司,广东茂名525000 [3]中国石油天然气股份有限公司呼和浩特石化分公司,内蒙古呼和浩特010000

出　　处：《当代化工》2024年第8期1804-1808,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:22178037)。

摘　　要：锌离子改性的缺陷型HZSM-5分子筛的表面酸性和锌离子改性常规HZSM-5分子筛明显不同,其丙烷转化反应催化性能更优。用缺陷型HZSM-5分子筛制备的Zn、Sn、Pt三金属组元改性催化剂也可能在催化性能上优于用常规HZSM-5分子筛(骨架缺陷较少)制备的Zn、Sn、Pt三金属组元改性催化剂。因此,选择高硅铝比(n(SiO_(2))/n(Al_(2)O_(3))=100)缺陷型HZSM-5分子筛(Z100)及其(NH_(4))_(2)SiF_(6)修复样品,分别制备了Zn、Sn、Pt三金属组元改性催化剂,并在此基础上研究了不同催化剂对丙烷探针分子反应的催化性能。脉冲微反应实验结果表明:在丙烷探针分子反应中,Zn、Sn、Pt改性缺陷型HZSM-5分子筛催化剂的烯烃和芳烃产物总选择性与参比催化剂相近,但催化活性提高近1倍。The defective HZSM-5 zeolite modified by zinc ion has different surface acidity and better catalytic performance for propane conversion reaction than conventional HZSM-5 zeolite.The modified catalysts of Zn,Sn and Pt prepared with defective HzSM-5 zeolite may also have better catalytic performance than those prepared by conventional HZSM-5 zeolite(less skeleton defects).In this paper,defective HZSM-5zeolite(Z100)with high Si/Al ratio(n(SiO_(2))/n(Al_(2)O_(3))=100)and the(NH4)2SiF6 repaired samples were selected to prepare the modified catalysts of Zn,Sn and Pt components respectively,and on this basic,the catalytic performance of different catalysts for propane probe molecular reaction was studied.The results of pulse micro-reaction experiment showed that the total selectivity of olefin and aromatics products of defective HZSM-5 zeolite catalyst modified by Zn,Sn and Pt was similar to that of the reference catalyst in propane probe molecular reaction,but its catalytic activity was nearly doubled.

关 键 词：丙烷催化转化 ZSM-5分子筛 Pt金属改性 骨架缺陷 

分 类 号：TQ032[化学工程]