改性Mo_2C/MCM-41的制备及其催化二氧化碳加氢反应性能
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- 英文论文题名：Prepration of Modified Mo_2C/MCM-41 and Catalytic Performance in Hydrogenation of CO_2
- 论文作者：李赫楠 ; 刘小然 ; 肖林飞 ; 吴伟 ; Hongyan Sun
- 英文论文作者：Henan Li ; Xiaoran Liu ; Linfei Xiao ; Hongyan Sun ; Wei Wu
- 年：2016
- 作者机构：催化技术国际联合研究中心高效转化的化工过程与技术黑龙江省普通高校重点实验室黑龙江大学化学化工与材料学院;
- 论文关键词：Mo_2C/MCM-41 ; 改性 ; 二氧化碳 ; 催化加氢 ; 甲醇
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十三分会：绿色化学
- 语种：中文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十三分会 ; 绿色化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：272k
- 原文格式：D
- 会议级别：全国
摘要
二氧化碳加氢制甲醇是实现其化学转化和综合利用的重要途径,催化剂的研制是实现这一转化过程的技术关键~([1])。本文以介孔MCM-41分子筛为载体,采用程序升温碳化法制备了担载20 wt.%Mo_2C的担载型催化剂Mo_2C/M41,并分别采用机械混合法和共浸渍法制备了MgO和Cu改性的MgO-Mo_2C/M41和Cu-Mo_2C/M41催化剂。由于具有弱碱性的MgO可以有效地吸附并活化二氧化碳,因此MgO-Mo_2C/M41显著地提高了二氧化碳加氢反应的催化活性,但是甲醇的选择性提高幅度不大。由于Cu可以促进H_2活化并溢流到Mo_2C表面,与Mo_2C上活化的CO_2作用生成HOCO并异构化成HCOO中间体,再进一步加氢生成甲醇,因此Cu-Mo_2C/M41催化剂同时提高了二氧化碳的转化率和甲醇的选择性。
Supported molybdenum carbide catalyst Mo_2C/M41,modified MgO-Mo_2C/M41 and Cu-Mo_2C/M41 catalysts were prepared by mechanical mixture with MgO and promoted by Cu co-impregnation method,respectively.Both modified catalysts showed improved catalytic performance in the hydrogenation of carbon dioxide to methanol.Increased activety and selectivity to methanol over the Cu-Mo_2C/M41 have been obtained due to stronger synergistic effect between Cu and Mo_2C on the catalyst surface.
Supported molybdenum carbide catalyst Mo_2C/M41,modified MgO-Mo_2C/M41 and Cu-Mo_2C/M41 catalysts were prepared by mechanical mixture with MgO and promoted by Cu co-impregnation method,respectively.Both modified catalysts showed improved catalytic performance in the hydrogenation of carbon dioxide to methanol.Increased activety and selectivity to methanol over the Cu-Mo_2C/M41 have been obtained due to stronger synergistic effect between Cu and Mo_2C on the catalyst surface.
引文
[1]Liang,X.L.;Dong,X.;Lin,G.D.Applied Catalysis B:Environmental.2009,88:315–322