摘要
考察了第二金属Ni改性对CO_(2)加氢制甲醇Cu/CeO_(2)催化剂活性的影响,并通过XRD、BET、XPS、H_(2)-TPR等手段对改性前后催化剂结构进行了表征。结果表明:金属负载量为20%时,Cu/CeO_(2)的比表面积最大;Cu与Ni质量比为3∶1时,催化剂碱度最大,氧空位含量最高,Cu-Ni协同作用最强;该催化剂在反应温度240℃、反应压力3 MPa、液时空速2400 mL/(g·h)、H_(2)与CO_(2)体积比为3∶1时催化CO_(2)加氢制甲醇效果较优,CO_(2)转化率为18.5%,甲醇时空产率为40.43 g/(kg·h)。
The effect of metal Ni modification on the activity of Cu/CeO_(2)catalyst for CO_(2)hydrogenation to methanol is investigated.The catalyst structure before and after modification is characterized by XRD,BET,XPS,H_(2)-TPR,etc.The results show that the specific surface area of Cu/CeO_(2)is the largest at a metal loading of 20%.A Cu to Ni mass ratio of 3∶1 results in the largest catalyst alkalinity,the largest oxygen vacancy content,and the strongest Cu-Ni synergism.The catalyst shows a superior reaction effect of CO_(2)hydrogenation to methanol at a reaction temperature of 240℃,a reaction pressure of 3 MPa,a space velocity of 2,400 mL/(g·h),and an H_(2) to CO_(2)volume ratio of 3∶1,with a CO_(2)conversion of 18.5%and a methanol space time yield of 40.43 g/(kg·h).
作者
甘泽
李传
邓文安
杜峰
罗辉
李庶峰
Gan Ze;Li Chuan;Deng Wenan;Du Feng;Luo Hui;Li Shufeng(State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao,Shandong 266580)
出处
《炼油技术与工程》
CAS
2024年第4期33-38,共6页
Petroleum Refinery Engineering
基金
山东省自然科学基金面上项目(ZR2022MB116)。
