硅/铝比对Y型分子筛负载贵金属催化剂在甲基环戊烷加氢转化反应中催化性能的影响  

Effect of SiO2/Al2O3 Ratio on Catalytic Performance of Nobel Metal Catalysts Supported by Y Zeolite in the Hydrogenation of Methylcyclopentane

作　　者：张雪莲 路宁悦 杜艳泽 秦波[2] 范彬彬[1] 李瑞丰[1] ZHANG Xuelian;LU Ningyue;DU Yanze;QIN Bo;FAN Binbin;LI Ruifeng(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Dalian Research Institute of Petroleum and Petrochemicals,SINOPEC,Dalian 116045,China)

机构地区：[1]太原理工大学化学化工学院,山西太原030024 [2]中国石化大连石油化工研究院,辽宁大连116045

出　　处：《石油学报（石油加工）》2019年第6期1052-1059,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(21576177)资助

摘　　要：以具有不同硅/铝比HY型分子筛为载体,采用浸渍法制备出一系列的Pt/HY双功能催化剂,并对其在甲基环戊烷(MCP)加氢转化反应中的催化性能进行了研究。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、N 2吸附-脱附、吡啶红外及NH 3-程序升温脱附(NH 3-TPD)等手段对所制催化剂的物化性质进行表征,揭示了催化剂中载体酸性及负载金属对其催化性能的影响。结果表明,双功能Pt/HY催化剂中Pt粒子和载体HY酸活性中心协同催化对甲基环戊烷加氢转化产物分布有很大影响,通过载体HY酸活性中心的数量可对产物分布进行调控,同时具有高B/L酸酸量比值的HY为载体更有利于开环产物和扩环产物的生成。相比于Ir和Ru,Pt与酸中心作用更强,表现出对扩环产物的高选择性。A series of Pt/HY bifunctional catalysts were prepared by impregnation method with HY zeolites as supporters with different Si/Al ratios.The catalytic performance of bifunctional catalysts were investigated on methylcyclopentane(MCP)hydrogenation conversion reaction.The physical-chemical properties of the catalyst were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),N 2 adsorption-desorption,pyridine infrared and NH 3-temperature programmed desorption(NH 3-TPD),to reveal the effect of acid properties of HY on the catalytic performances.Results indicate that synergistic effects of Pt and acid sites on Pt/HY catalysts take great influence on the product distribution in methylcyclopentane hydrogenation conversion reaction,which is attributed to the tuning of acid sites amount of HY zeolites.And HY zeolite with high B/L value is in favor of the formation of ring opening and ring enlargement products.Compared to Ir and Ru,Pt metal shows higher synergistic catalytic actions with acid sites,thus Pt/HY exhibits high ring enlargement product selectivity.

关 键 词：Y型分子筛 酸性 甲基环戊烷 双功能催化剂 

分 类 号：TE624.4[石油与天然气工程—油气加工工程] O643.3[理学—物理化学]