Dry Reforming of Methane over Ni-Fe-Al Catalysts Prepared by Solution Combustion Synthesis
Manabayeva A.M. Mäki-Arvela P. Vajglová Z. Martinéz-Klimov M. Tirri T. Baizhumanova T.S. Grigor’eva V.P. Zhumabek M. Aubakirov Y.A. Simakova I.L. Murzin D.Y. Tungatarova S.A.
26 July 2023American Chemical Society
Industrial and Engineering Chemistry Research
2023#62Issue 2911439 - 11455 pp.
Dry reforming of methane (DRM) is a promising method to utilize two greenhouse gases, such as CH4 and CO2, to produce synthesis gas. In the current work, both monometallic Ni and bimetallic Ni-Fe catalysts with different Fe/Ni molar ratios, synthesized by solution combustion synthesis (SCS) in DRM, were investigated using a feed ratio of CH4/CO2/Ar of 1:1:1 at 600-900 °C. The catalysts were characterized by several physicochemical techniques such as X-ray diffraction (XRD), scanning electron microscopy energy-dispersive X-ray (SEM-EDX) spectroscopy, transmission electron microscopy (TEM), CHNS, N2 physisorption, H2-TPR, O2-TPO, NH3-TPD, and thermogravimetric analysis (TGA). One of the highest hydrogen yields of 81% was obtained at 93% conversion of CH4 and 94% conversion of CO2 for the bimetallic 15Ni-5Fe-30Al catalyst, which contained, according to XRD, NiAl2O4 spinel and metallic Ni phases. The spinel phase was decomposed during the reaction, while the Ni3Fe alloy was formed. Catalysts with a higher Fe/Ni ratio exhibited lower conversion and contained an inactive FeAl2O4 spinel. Rather stable yields of CO and H2 were obtained in an experiment with 20 h time-on-stream.
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Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, Turku, 20500, Finland
D.V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry, Almaty, 050000, Kazakhstan
Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Boreskov Institute of Catalysis, Novosibirsk, 630090, Russian Federation
Kazakh-British Technical University
Laboratory of Industrial Chemistry and Reaction Engineering
D.V. Sokolsky Institute of Fuel
Al-Farabi Kazakh National University
Boreskov Institute of Catalysis
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