低碳化学与化工2025，Vol.50Issue(12)：40-47,8.DOI:10.12434/j.issn.2097-2547.20250079
m(SiO2)∶m(Al2O3)对负载型Ni催化剂乙烯齐聚反应催化性能的影响
Effects of m(SiO2)∶m(Al2O3)on catalytic performances of supported Ni catalysts for ethylene oligomerization
摘要
Abstract
Ethylene oligomerization is the primary route for industrial synthesis of higher carbon α-olefins.Traditional homogeneous catalytic systems face challenges such as difficult in catalyst separation and poor product selectivity,necessitating the development of novel heterogeneous catalytic systems for process optimization.A series of Ni catalysts supported on amorphous aluminum silicates were prepared by sol-gel method+impregnation method,and the effects of different m(SiO2)∶m(Al2O3)on physicochemical properties of the Ni catalysts and their catalytic performances in ethylene oligomerization were investigated.The results show that under the reaction conditions of temperature of 240 ℃,pressure of 1.5 MPa and space velocity of 10000 mL/(g·h)for 6 h,the catalyst(Ni5/Si9-Al11)with Ni mass fraction of 5%and m(SiO2)∶m(Al2O3)of 9∶11 exhibits the best catalytic performance.It achieves ethylene conversion rate of 71.36%,with the products dominate by C4～C8 even-numbered olefins.Notably,the C4 olefins selectivity reaches 81.78%.Differences of m(SiO2)∶m(Al2O3)in the catalysts have no impact on chemical valence state of Ni,which remains in the Ni2+form.关键词
乙烯齐聚/无定形硅酸铝盐/Ni催化剂/协同作用Key words
ethylene oligomerization/amorphous aluminum silicates/Ni catalysts/synergistic interaction分类
化学化工引用本文复制引用
胡婷婷,付鑫鑫,党闪闪,张振洲,涂维峰..m(SiO2)∶m(Al2O3)对负载型Ni催化剂乙烯齐聚反应催化性能的影响[J].低碳化学与化工,2025,50(12):40-47,8.基金项目
国家自然科学基金(22478365). （22478365）
