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• W3153918017 abstract "CO2 methanation is a very promising technology for the production of alternative fuels with the simultaneous use of greenhouse gases. Therefore, intensive research is carried out on the optimization of catalysts with excellent properties for operation in the area of low temperatures. Here, we present research on a catalyst composed of 19 wt % NiO supported on alumina/calcium aluminate. The catalyst was modified with V2O5 in order to be suited for extrusion and scale-up in the frame of power to gas technology. Samples with various vanadium contents (Ni–xV, where x represents the amount of vanadium) were prepared in the form of ground granules obtained from 0.5 mm diameter spherical grains. X-ray diffraction (XRD), transmission electron microscopy (TEM), skeletal infrared (IR), diffuse reflectance ultraviolet–visible-near-infrared (DR-UV–vis-NIR), and X-ray photoelectron (XPS) spectroscopies, as well as H2 temperature-programmed reduction (H2-TPR), were used to characterize the samples. Catalytic performances of the catalyst samples were tested in CO2 hydrogenation at 1 atm. Among the many supported Ni catalysts tested in our laboratories, the catalysts of 0.5 and 1 wt % V showed very high activity, with the highest CH4 yield of 97% at 623 K. These catalysts exhibited 100% CH4 selectivity up to 673 K. The excellent performances of the studied catalysts are attributed to the possible formation of Ni–V solid solution alloy nanoparticles." @default.
• W3153918017 created "2021-04-26" @default.
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• W3153918017 date "2021-04-16" @default.
• W3153918017 modified "2023-09-26" @default.
• W3153918017 title "Improvement of Ni/Al₂O₃ Catalysts for Low-Temperature CO₂ Methanation by Vanadium and Calcium Oxide Addition" @default.
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• W3153918017 doi "https://doi.org/10.1021/acs.iecr.0c05556" @default.
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