A highly adaptable Ni catalyst for Liquid Organic Hydrogen Carriers hydrogenation

被引:36
作者
Ding, Yuhang [1 ]
Dong, Yuan [1 ]
Zhang, Heshun [1 ]
Zhao, Yinheng [1 ]
Yang, Ming [1 ,2 ]
Cheng, Hansong [1 ]
机构
[1] China Univ Geosci, Fac Mat Sci & Chem, Sustainable Energy Lab, Wuhan 430074, Peoples R China
[2] China Univ Geosci, Zhejiang Inst, Hangzhou 311305, Peoples R China
基金
中国国家自然科学基金;
关键词
Nickel-alumina-silica; Highly adaptable catalyst; Composite support; Liquid organic hydrogen carrier; Catalytic hydrogenation; SUPERCRITICAL WATER GASIFICATION; SUPPORTED RUTHENIUM; SURFACE-AREA; PD CATALYST; STORAGE; RU; DEHYDROGENATION; KINETICS; ALUMINA; METHANE;
D O I
10.1016/j.ijhydene.2021.05.196
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Reducing the cost of hydrogenation/dehydrogenation catalysts and improving the catalytic activity are essential steps to promote the commercial application of Liquid Organic Hydrogen Carriers (LOHCs) technology. We reported a series of highly adaptable 70 wt% Ni supported catalysts prepared by a facile co-precipitation method. The as-prepared catalysts were used in the hydrogenation of several promising LOHCs candidates, including benzene, N-propylcarbazole, N-ethylcarbazole and dibenzyltoluene. By adjusting the ratio of Al and Si, the Ni-70/AlSiO-1/1 catalyst with Al and Si in a molar ratio of 1:1 presents highest catalytic activity for hydrogenation of the above LOHCs, indicating the catalyst is highly adaptable for different LOHCs. The characterization results proved that the presence of SiO2 could significantly weaken the interaction between metal and carrier and decrease the formation of NiAl2O4 species, which is beneficial to the reducibility of Ni. The introduced Al2O3 can inhibit the agglomeration of Ni and increase the dispersion of the metal. Besides, the Ni-70/AlSiO-1/1 catalyst was used to hydrogenate N-propylcarbazole by 5 cycles. In the fifth cycle, the hydrogen uptake reached the theoretical hydrogenation storage within 1.5 h, which suggested the excellent stability of the catalyst. Because of its low cost, high efficiency, high adaptation and highly stable, the self-made Ni catalyst has potential prospect in large-scale LOHCs application. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:27026 / 27036
页数:11
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