Ni/Mg-Al_(2)O_(3)催化剂制备方法对催化CH_(4)-CO_(2)重整反应性能的影响  

Effect of Preparation Method of Ni/Mg-Al_(2)O_(3) Catalyst on Its Catalytic Performance in CH_(4)-CO_(2) Reforming Reaction

作　　者：耿锦涛 王欢[1] 朱汉东 张启俭[1] 冯效迁 赵永华[1] GENG Jintao;WANG Huan;ZHU Handong;ZHANG Qijian;FENG Xiaoqian;ZHAO Yonghua(School of Chemistry&Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001

出　　处：《石油学报（石油加工）》2023年第4期771-779,共9页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：辽宁省自然科学基金项目(2019-ZD-0688);辽宁省博士科研启动基金项目(2020-BS-240);辽宁省教育厅重点公关项目(2020ZD05)资助。

摘　　要：分别采用一锅法、改进的沉积沉淀法和真空浸渍法制备了具有不同结构的Ni/Mg-Al_(2)O_(3)催化剂,采用XRD、TEM、XPS、H_(2)-TPR、N_(2)吸附-脱附等手段对催化剂进行表征分析,并探究了其催化CH_(4)-CO_(2)重整反应的性能。结果表明:不同催化剂制备方法影响了催化剂中金属和载体间的相互作用,进而使其表现出不同的CH_(4)-CO_(2)重整反应性能;与改进的沉积沉淀法和真空浸渍法相比,以一锅法制备的催化剂具有更强的金属-载体间相互作用、更大的比表面积和更规整的介孔结构;在反应温度为750℃、压力为0.1 MPa、反应物CH_(4)/CO_(2)摩尔比为1、MHSV为32 L/(g·h)的条件下,CH_(4)转化率为90.16%,且在反应20 h内未发生明显改变,表现出较好的稳定性。Ni/Mg-Al_(2)O_(3) catalysts with different structures were prepared by the one-pot method,improved deposition precipitation method and vacuum impregnation method,and the catalysts were characterized using XRD,TEM,XPS,H_(2)-TPR,and N_(2) absorption-desorption techniques;meanwhile,their catalytic performance in CH_(4)-CO_(2) reforming reaction was investigated.The results show that the preparation methods of different catalysts have effects on the interactions between metal and carrier in catalysts,which thus demonstrate different CH_(4)-CO_(2) reforming reactions.Compared with the improved deposition precipitation method and vacuum impregnation method,the catalyst prepared by one-pot method exhibits stronger metal-support interaction,larger specific surface area and more regular mesoporous structure.At the reaction temperature of 750℃,pressure of 0.1 MPa,reactant molar ratio of CH_(4)/CO_(2) of 1,and MHSV of 32 L/(g·h),the conversion of CH_(4) is 90.16%,and has no obvious changes during the reaction of 20 h,displaying good stability.

关 键 词：Ni/Mg-Al_(2)O_(3) 一锅法 甲烷 二氧化碳 重整 金属-载体相互作用 

分 类 号：O643[理学—物理化学]