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• W2894955718 endingPage "126" @default.
• W2894955718 startingPage "118" @default.
• W2894955718 abstract "In this study, the effect of adding second metals (La, Co, Ce, and Fe) to the nickel catalysts supported on mesoporous nanocrystalline γ‐Al 2 O 3 in CO 2 methanation was investigated. The co‐impregnation method was implemented to synthesize the bimetallic catalysts and the X‐ray diffraction, nitrogen adsorption/desorption, and temperature‐programmed reduction methods were employed for the catalyst characterization. According to the catalytic results, the addition of the second metals to the nickel‐based catalyst increased the catalyst reducibility and decreased the specific surface area from 143.3 to 107.9 m 2 /g and nickel crystallite size from 18.9 to 5.1 nm. Furthermore, the addition of 10 wt % lanthanum to the 20 wt % Ni/γ‐Al 2 O 3 increased the CO 2 conversion from 42% to 80.3% in methanation of carbon dioxide. Novelty or Significance: The study is focused on the preparation and evaluation of the La, Co, Ce, and Fe‐promoted Ni/Al 2 O 3 nanocatalysts with mesoporous structure in CO 2 methanation reaction. The results confirmed that the incorporation of these compounds in catalyst composition improved the reducibility of the nickel catalyst and decreased the BET area and Ni crystallite size and affected the CO 2 conversion and CH 4 selectivity. Among these metal oxides, the addition of La 2 O 3 to the Ni/Al 2 O 3 catalyst had the highest effect on the activity and selectivity of the Ni/Al 2 O 3 catalyst. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 118–126, 2019" @default.
• W2894955718 created "2018-10-12" @default.
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• W2894955718 date "2018-10-05" @default.
• W2894955718 modified "2023-09-25" @default.
• W2894955718 title "Preparation of Ni-M (M: La, Co, Ce, and Fe) catalysts supported on mesoporous nanocrystalline γ-Al₂ O₃ for CO₂ methanation" @default.
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• W2894955718 doi "https://doi.org/10.1002/ep.13040" @default.
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