Nickelcobalt catalyst supported on TiO2-coated SiO2 spheres for CO2 methanation in a fluidized bed |
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| Affiliation: | 1. School of Chemical and Biomedical Engineering, Nanyang Technological University 637459, Singapore;2. Institute of Advanced Synthesis, Nanjing Tech University, Nanjing 211800, Jiangsu Province, China;3. Singapore Membrane Technology Center, Nanyang Technological University, Singapore 637141;1. School of Intelligent Manufacturing, Nanjing Polytechnic Institute, 210048 Jiangsu, China;2. State Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, 210096 Jiangsu, China;3. John and Willie Leone Family Department of Energy and Mineral Engineering and The EMS Energy Institute, The Pennsylvania State University, University Park, PA 16802, USA;4. School of Energy and Power, Nanjing Institute of Technology, 211167 Jiangsu, China;1. School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;2. Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;3. Environmental and Occupational Health Programme, School of Health Sciences, Health Campus, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia;1. Center of Sustainable Process Engineering (CoSPE), Department of Chemical Engineering, Hankyong National University, Gyeonggi-do, Anseong-si, Jungang-ro 327, 17579, South Korea;2. Climate Change Research Division, Korea Institute of Energy Research, Daejeon, Yuseong-gu, Gajeong-ro 152, 34129, South Korea |
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| Abstract: | Carbon dioxide (CO2) methanation, which is the reduction of carbon dioxide to methane by hydrogen generated from renewable energy, is a promising process for carbon recycling. Towards large-scale implementation, (i) fluidized beds, which have excellent heat transfer, are promising to perform the highly exothermic reaction; and (ii) catalysts suitable for long-term use in fluidized beds are needed. In this study, a novel Ni Co bimetal catalyst supported on TiO2-coated SiO2 spheres (NiCo/TiO2@SiO2) was rationally designed and evaluated for CO2 methanation in fluidized bed reactor. The results demonstrate that NiCo/TiO2@SiO2 exhibited high CO2 conversion with CH4 selectivity of greater than 95%. Moreover, the superior performance was sustained for more than 100 h in the fluidized bed reactor, affirming the long-term stability of the catalyst. Comprehensive characterizations were conducted to understand the relationship between structure and performance. This study is expected to be valuable for the potential implementation of the CO2 methanation process in fluidized beds. |
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| Keywords: | Carbon dioxide methanation Fluidized bed reactor Bimetal catalysts Rational design |
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