不同方法制备的Ni修饰介孔碳负载的β-Mo_2C催化CO加氢反应制备混合醇  

β-Mo_2C Catalysts Supported on Ni Modified Mesoporous Carbon Prepared by Different Methods and Their Application in CO Hydrogenation to Synthesize Mixed Alcohol

作　　者：胡瑞珏[1,2] 赵娜娜 李佳佳 张幔娣 李建立 苏海全[1,2] 谷晓俊[2] HU Ruijue;ZHAO Nana;LI Jiajia;ZHANG Mandi;LI Jianli;SU Haiquan;GU Xiaojun(College of Life Sciences,Inner Mongolia University,Hohhot 010021,China;Inner Mongolia Key Laboratory of Coal Chemistry,School of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021,China)

机构地区：[1]内蒙古大学生命科学院,内蒙古呼和浩特010021 [2]内蒙古大学化学化工学院内蒙古自治区煤化学重点实验室,内蒙古呼和浩特010021

出　　处：《石油学报（石油加工）》2018年第4期825-834,共10页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(21166014);内蒙古自治区领军人物和创新团队科学项目(20120101);内蒙古自治区"草原英才"创新团队项目(201201);内蒙古自治区高等学校科学研究项目(NJZZ17001)资助

摘　　要：通过浸渍法和碳热还原法制备了以K2CO3为助剂、以Ni修饰介孔碳为载体的碳化钼(β-Mo_2C)催化剂。在合成气原料比n(H2)/n(CO)=1.0、反应压力p=8.0 MPa、合成气气体空速GHSV=3000h-1和反应温度T=300℃的反应条件下,进行了β-Mo_2C催化CO加氢反应制备混合醇的催化反应评价。评价结果表明,镍/介孔碳(Ni/NC)载体的不同制备方法对β-Mo_2C催化合成低碳混合醇催化性能有显著影响。由软模板一步法制备的前驱体OSM-Ni/NC组成的催化剂K-β-Mo_2C-OSM-Ni/NC的总醇选择性(40.0%)高于由软模板浸渍法制备的前驱体IM-Ni/NC组成的催化剂K-β-Mo_2C-IM-Ni/NC的总醇选择性(28.5%),其原因是前者的活性组分分散度高且在孔道内部分布较多,并且前者中存在的Mo0.84Ni0.16相比后者中存在的MoNi4对低碳醇生成的促进作用更强。β-Mo2C catalysts are promoted by K2CO3 and supported on nickel modified mesoporous carbon（Ni/NC）by incipient wetness impregnation and following carbothermal reduction method.At n（H2）/n（CO）=1.0,p=8.0 MPa,GHSV=3000 h-1 and T=300℃,catalytic performance of the catalysts was evaluated by the synthesis of mixed alcohols from syngas.Results show that different preparation methods of ordered mesoporous carbon/nickel precursor exhibit remarkable impacts on catalytic performance for synthesizing mixed alcohols.It is found that the K-β-Mo2COSM-Ni/NC（40.0%total alcohol selectivity）catalyst comprised of OSM-Ni/NC supports prepared by one-pot soft template method presents higher catalytic performance in alcohols selectivity than that of K-β-Mo2C-IM-Ni/NC catalyst（28.5% total alcohol selectivity）consisted of IM-Ni/NC supports prepared by soft template method and incipient wetness impregnation method.That is because theβ-Mo2C-OSM-Ni/NC has higher dispersion of active species on supports,making more active sites distributed inside the pores.In addition,the Mo0.84 Ni0.16 phase inβ-Mo2C-OSM-Ni/NC catalyst shows better promotion effect than the MoNi4 phase inβ-Mo2C-IM-Ni/NC.

关 键 词：合成醇 负载型催化剂 介孔材料 Mo2C 合成气 

分 类 号：TQ426[化学工程] TQ223.12