Lin Jianghui, Ma Caiping, Luo Jing, Kong Xianghui, Xu Yanfei, Ma Guangyuan, Wang Jie, Zhang Chenghua, Li Zhengfeng, Ding Mingyue
School of Power and Mechanical Engineering, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University Wuhan 430072 China
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan 030001 China.
RSC Adv. 2019 Mar 15;9(15):8684-8694. doi: 10.1039/c8ra10348h. eCollection 2019 Mar 12.
A Ni based mesoporous γ-AlO (MA) catalyst was prepared partial hydrolysis without organic surfactants and employed in the carbon dioxide methanation reaction. The obtained catalysts were characterized by N adsorption-desorption, H-TPR, XRD, XPS, TG, SEM and TEM-EDS techniques. CO methanation was performed in a fixed-bed reactor. A high surface area of MA with excellent hydrothermal stability was obtained, which promoted the dispersion of nickel species, producing a better catalytic performance. Incorporation of more NiO species into the Ni/MA catalyst increased the amount of active metallic Ni sties, further improving the catalytic activity and CH selectivity. Moreover, the monolithic skeleton of MA with fabric-like walls suppressed the aggregation of active metallic Ni sites and carbon deposition, enhancing the catalyst's stability, which provides a new insight for potential industrial applications.
通过无有机表面活性剂的部分水解制备了一种镍基介孔γ -AlO（MA）催化剂，并将其用于二氧化碳甲烷化反应。采用N吸附-脱附、H-TPR、XRD、XPS、TG、SEM和TEM-EDS技术对所得催化剂进行了表征。在固定床反应器中进行了CO甲烷化反应。获得了具有优异水热稳定性的高比表面积MA，这促进了镍物种的分散，产生了更好的催化性能。在Ni/MA催化剂中掺入更多的NiO物种增加了活性金属Ni位点的数量，进一步提高了催化活性和CH选择性。此外，具有织物状壁的MA整体骨架抑制了活性金属Ni位点的聚集和碳沉积，提高了催化剂的稳定性，这为潜在的工业应用提供了新的见解。
