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双金属xNiyCo催化剂在二氧化碳重整甲烷反应中的催化性能:制备方法及载体孔结构的影响

发表时间:2017-07-13  浏览量:188  下载量:22
全部作者: 吴昊,杨维维,贺德华
作者单位: 清华大学理学院有机光电子与分子工程教育部重点实验室
摘 要: 以有序介孔SBA-15为载体,分别采用β-环糊精(β-CD)辅助浸渍法和传统浸渍法(无β-CD辅助)制得xNiyCo/SBA-15-CD和xNiyCo/SBA-15负载型双金属催化剂。同时,采用β-CD辅助浸渍法,以常规SiO2为载体制得xNiyCo/SiO2-CD催化剂。对不同方法制得的xNiyCo/SBA-15-CD、xNiyCo/SBA-15和xNiyCo/SiO2-CD催化剂进行低温N2吸脱附、电感耦合等离子体发射光谱(inductively coupled plasma-atomic emission spectroscopy,ICP-AES)、X射线衍射(X-ray diffraction,XRD)和H2程序升温还原(H2 temperature programmed reduction,H2-TPR)等表征。在固定床反应器上考察各种催化剂在二氧化碳重整甲烷(carbon dioxide reforming of methane,CRM)反应中的催化性能,重点研究催化剂制备过程中β-CD的添加和载体孔结构的存在对催化性能的影响。结果表明,添加了β-CD辅助制备的xNiyCo/SBA-15-CD催化剂分散性能更好,且金属载体相互作用性能更强,在CRM反应中表现出更好的催化性能。
关 键 词: 物理化学;β-环糊精;SBA-15;双金属催化剂;高分散;二氧化碳重整甲烷反应
Title: Catalytic performances of bimetalic xNiyCo catalysts over carbon dioxide reforming methane: influences of preparation methods and pore structures of the support
Author: WU Hao, YANG Weiwei, HE Dehua
Organization: Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, School of Sciences, Tsinghua University
Abstract: xNiyCo/SBA-15-CD and xNiyCo/SBA-15 catalysts were prepared using ordered mesoporous SBA-15 as the support through the β-CD assisted wet impregnation method and traditional impregnation method (without β-CD addition), respectively. While, xNiyCo/SiO2-CD catalyst was prepared using conventional SiO2 as the support through the β-CD assisted wet impregnation method. These catalysts were characterized by low temperature N2/adsorption-desorption, inductively coupled plasma-atomic emission spectroscopy (ICP-AES), X-ray diffraction (XRD) and H2 temperature programmed reduction (H2-TPR) methods. Besides, these catalysts were employed to catalyze the carbon dioxide reforming of methane (CRM) reaction to evaluate the influence of the β-CD addition (different preparation methods) and pore structures of the support on the catalytic performances of the catalysts. The xNiyCo/SBA-15-CD catalyst, prepared with β-CD addition, behaved much higher dispersion and stronger metal-support interaction, which induced better behavior in the CRM reaction.
Key words: physical chemistry; β-CD; SBA-15; bimetalic catalysts; highly dispersed; carbon dioxide reforming of methane reaction
发表期数: 2017年7月第13期
引用格式: 吴昊,杨维维,贺德华. 双金属xNiyCo催化剂在二氧化碳重整甲烷反应中的催化性能:制备方法及载体孔结构的影响[J]. 中国科技论文在线精品论文,2017,10(13):1457-1464.
 
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