Abstract
A potassium and calcium co-promoted nickel catalyst (KCaNi/α-Al2O3) prepared by a direct impregnation method possessed a high activity, high stability and excellent coke resistance properties in CH4 reforming with CO2. XRD, XPS and H2-TPR characterizations indicated that (i) Ca and K strengthened the interaction between Ni and α-Al2O3 and promoted the formation of a unique NiAl2O4 phase on the surface of the catalyst and (ii) Ca and K increased the dispersion of Ni and retarded its sintering. Coking reactions (CH4 temperature-programmed decomposition and O2-TPO) disclosed that K reduced carbon formation via CH4 decomposition.
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Hou, Z., Yokota, O., Tanaka, T. et al. A Novel KCaNi/α-Al2O3 Catalyst for CH4 Reforming with CO2 . Catalysis Letters 87, 37–42 (2003). https://doi.org/10.1023/A:1022849009431
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DOI: https://doi.org/10.1023/A:1022849009431