Enhanced activity and coke resistivity of NiCoFe nanoalloy catalyst in CO2 reforming of methane |
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| Institution: | 1. School of Applied Science and Humanities, Haldia Institute of Technology, Haldia, 721657, India;2. Departments of Chemistry, Cooch Behar Panchanan Barma University, Cooch Behar, 736101, India;3. Center for Basic Sciences, Pt. Ravishankar Shukla University, Raipur, 492010, (C.G), India;4. Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK;5. College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, China;1. Department of Chemistry, GLA University, Mathura, 281406, India;2. Department of Chemistry, Kalindi College, University of Delhi, Delhi, 110008, India;3. Department of Chemistry, Shyamlal College, University of Delhi, Delhi, 110032, India;4. Department of Chemistry, Faculty of Science, Agriculture and Engineering, University of Zululand, P/Bag X1001, KwaDlangezwa, 3886, South Africa;1. Department of Catalysis and Fine Chemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, India;2. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India;1. Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, 3220, Victoria, Australia;2. Nano Surface Texturing Lab, Department of Metallurgical & Materials Engineering, Defence Institute of Advanced Technology (DU), Ministry of Defence, Girinagar, Pune, 411025, India;3. Fiber Science and Technology, School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong |
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| Abstract: | NiCo nanoalloy catalysts were prepared from hydrotalcite precursors and used in CO2 reforming of methane (DRM) under atmospheric and 2 MPa pressure in a fixed-bed reactor at 700-850 °C. The Ni6Co1 catalyst with a molar ratio of Ni/Co to 6 showed the highest stability and activity in DRM under atmospheric pressure. This was due to the homogeneous dispersion of nanoalloy particles (∼14 nm) on the MgAl(O) support, which had a strong metal-support interaction. Nonetheless, a slow and continuous deactivation was spotted under 2 MPa pressure due to the coke deposition. Further modification of Ni6Co1 with optimum amount of Fe (in Ni6Co0.5Fe0.5) formed ternary NiCoFe nanoalloy with improved metal-support interaction and reduced alloy size (∼10 nm). The presence of Fe significantly improved the coke resistance capability and provided high stability under 2 MPa pressure. |
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| Keywords: | Syngas Nanoalloy catalyst Coke deposition Quench reactor |
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