摘要
采用共浸渍法制备了不同Zn负载量的NiZn/Beta-Al_(2)O_(3)双功能加氢环异构催化剂。利用XRD、TEM、N_(2)吸附-脱附、NH_(3)-TPD、Py-FTIR及XPS等方法对催化剂进行了表征,并在固定床微型反应装置上考察了催化剂催化四氢萘加氢环异构化性能。结果表明,Zn的引入有效抑制了金属Ni的团聚,提高了Ni的分散性。同时Zn的引入减少了催化剂的强酸性位与B酸性位,减少了四氢萘的开环裂化,提高了环异构产物选择性。当Zn的引入量为2%(质量分数)时,催化四氢萘的异构化产物收率由16%提高到24%,裂化产物的选择性由46%降低至21%。
The bi-functional hydrogenation catalysts NiZn/Beta-Al_(2)O_(3)with different Zn loading contents were prepared by co-impregnation method.The catalysts were characterized by XRD,TEM,N_(2) adsorption-desorption,NH_(3)-TPD,Py-FTIR and XPS methods and tested in hydro-cycloisomerization of tetralin using a fixed bed microreactor.The results showed that the addition of Zn could inhibit the agglomeration of active metal Ni and thus increased the dispersion of Ni.Meanwhile,the introduction of Zn reduced the strong acid site and B acid site of the catalyst,reduced the ring-opening cracking of tetrahydronaphthalene,and improved the selectivity of cycloisomerization products.As the amount of Zn was 2%(mass fraction),the yield of isomerization products increased from 16%to 24%,and the selectivity of cracking products decreased from 46%to 21%.
作者
付延鹏
王耀伟
王健
张术苹
李奕川
王东超
柴永明
刘晨光
刘宾
FU Yanpeng;WANG Yaowei;WANG Jian;ZHANG Shuping;LI Yichuan;WANG Dongchao;CHAI Yongming;LIU Chenguang;LIU Bin(State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,Shandong,China;Shandong Chambroad Petrochemicals Co.,Ltd.,Binzhou 256500,Shandong,China)
出处
《工业催化》
2025年第5期50-57,共8页
Industrial Catalysis
基金
国家自然科学基金项目(22278440、22078362、52274308、U22B20144)
山东省重大科技创新工程项目(2021ZLGX06)
重质油国家重点实验室开放基金资助项目(SKLHOP202101003)。
