Ni@SiO_(2)合成方法对催化剂结构及其双环戊二烯加氢性能的影响  

SYNTHESIS OF Ni@SiO_(2) AND ITS CATALYTIC PERFORMANCE FOR DICYCLOPENTADIENE HYDROGENATION

作　　者：方宇童 闫瑞 贾丹丹 赵杰 陶志平 Fang Yutong;Yan Rui;Jia Dandan;Zhao Jie;Tao Zhiping(SIONPEC Research Institute of Pretroleum Processing Co.,Ltd.,Beijing 100083)

机构地区：[1]中石化石油化工科学研究院有限公司,北京100083

出　　处：《石油炼制与化工》2024年第6期44-51,共8页Petroleum Processing and Petrochemicals

基　　金：国家重点研发项目(2021YFB3500700)。

摘　　要：JP-10燃料主要成分挂式四氢双环戊二烯(exo-THDCPD)一般通过双环戊二烯(DCPD)加氢及异构化合成,DCPD的饱和加氢是关键步骤,因此DCPD加氢催化剂的合成尤为重要。基于此,以六水合硝酸镍和硅溶胶为原料,分别通过蒸氨法、沉积法、凝胶法、浸渍法制备出镍质量分数为30%的Ni@SiO_(2)催化剂,应用于DCPD加氢制备四氢双环戊二烯(endo-THDCPD)的反应中。经表征分析发现,通过蒸氨法制备层状硅酸镍结构的前躯体,再经焙烧还原得到的Ni@SiO_(2)催化剂,具有L酸酸量高、Ni纳米级分散、介孔丰富的特点,这使其在DCPD加氢反应中展现出优异的催化活性。当反应温度为25℃时,DCPD加氢转化率为99.9%,endo-THDCPD收率高达99.9%。Exo-tetrahydrodicyclopentadiene(exo-THDCPD),the main component of JP-10 fuel,is usually synthesized by hydrogenation and isomerization of dicyclopentadiene(DCPD).The saturated hydrogenation of DCPD is the key step,so the synthesis of DCPD hydrogenation catalyst is particularly important.Based on this,Ni@SiO_(2) catalysts with a nickel mass fraction of 30%were prepared by different synthesis methods(such as deposition precipitation method,ammonia evaporation method,gel method and impregnation method),using nickel nitrate hexahydrate and silica sol as raw materials,and applying to the hydrogenation of DCPD to tetrahydrodicyclopentadiene(endo-THDCPD).It was found that the Ni@SiO 2 catalyst prepared by ammonia evaporation and calcination reduction had the characteristics of layered nickel silicate,abundant Lewis acid,Ni nano-scale dispersion and rich mesopores structure,which made it exhibit excellent catalytic activity in DCPD hydrogenation reaction.When the reaction temperature was 25℃,the conversion of DCPD was 99.9%and the yield of endo-THDCPD was 99.9%.

关 键 词：双环戊二烯 Ni@SiO_(2)催化剂 低温加氢 层状硅酸镍 

分 类 号：TQ511[化学工程] TQ231.2[理学—物理化学] O643.36[理学—化学]