Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 43, Issue 1, Pages 239-250Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.11.052
Keywords
Ordered mesostructure; Ru doping; CaO doping; Nickel catalyst; CO2 methanation
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Funding
- National Natural Science Foundation of China [21606146]
- Natural Science Foundation of Shandong Province [ZR2016BB17, 2016ZRB01037]
- Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents [2016RCJJ005, 2016RCJJ006]
- Qingdao Postdoctoral Applied Research Project [2015202]
- China National Coal Association Science and Technology Research Program [MTKJ2016-266]
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The ordered mesoporous NiRu-doped CaO-Al2O3 nanocomposites were synthesized via a facile evaporation-induced self-assembly method for CO2 methanation. Metallic Ni and Ru species retained the single-component heterostructure rather than NiRu alloy over the 600 degrees C-reduced catalysts. Owing to the synergistic effect of bimetallic Ni Ru as well as the improved H-2 and CO2 chemisorption capacities after the addition of Ru and CaO promoters, the ordered mesoporous 10N1R2C-OMA catalyst exhibited enhanced catalytic activity and selectivity, which achieved the maximum CO2 conversion of 83.8% and CH4 selectivity of 100% at 380 degrees C, 0.1 MPa, 30000 mL g(-1) h(-1). In a 550 degrees C-109 h-lifetime test, the ordered mesoporous 10N1R2C-OMA catalyst showed high stability and superior anti-sintering property due to the confinement effect of the ordered mesostructure. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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