Mesostructured cellular foam silica supported bimetallic LaNi1-xCoxO3 catalyst for CO2 methanation |
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| Affiliation: | 1. Catalyst and Advanced Materials Research Laboratory, Chemical Engineering Department, Faculty of Engineering, University of Kashan, Kashan, Iran;2. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran;3. School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Iran;1. School of Material Science and Engineering, University of Jinan, Jinan 250022, PR China;2. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, PR China;3. Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China;4. School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;5. School of Environmental Science & Technology, Nanjing University of Information Science & Technology, Nanjing 210044, PR China;1. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran;2. Catalyst and Advanced Materials Research Laboratory, Chemical Engineering Department, Faculty of Engineering, University of Kashan, Kashan, Iran;1. AGH University of Science and Technology, Faculty of Energy and Fuels, Al. A. Mickiewicza 30, 30-059, Cracow, Poland;2. Sorbonne Université, Institut Jean Le Rond d’Alembert, CNRS, UMR 7190, 2 Place de la Gare de Ceinture, 78210, Saint-Cyr-L’Ecole, France;3. Institut de Recherche de Chimie Paris, UMR 8247 (CNRS – Chimie ParisTech), 75231 Paris, France;1. Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;2. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China |
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| Abstract: | To address the metal sintering problem over the transitional one-dimensional-channel materials supported metal catalyst at high loadings, the 3-dimensional mesostructured cellular foam silica (MCF) supported bimetallic LaNi1–xCoxO3 perovskite catalyst was prepared via a citric acid assisted impregnation method for CO2 methanation. Highly dispersed La2O3 and bimetallic Ni–Co alloy nanoparticles with size of around 5.1 nm were immobilized inside the pores of the MCF silica with intimate contact, resulting in high catalytic activity at low temperature and superior stability at high temperature for CO2 methanation. Among all catalysts, the LaNi0.95Co0.05O3/MCF catalyst exhibited the highest catalytic activity due to its smallest Ni–Co alloy nanoparticles as well as the synergistic effect between Ni and Co species. In addition, LaNi0.95Co0.05O3/MCF catalyst also showed high long-term stability without Ni sintering in a 100 h-lifetime test, which was attributed to the confinement effect of the MCF support as well as the physical barrier of La2O3 species nearby metallic Ni nanoparticles. |
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| Keywords: | Activity Stability |
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