Article

Catalysis Letters

, Volume 87, Issue 1, pp 37-42

A Novel KCaNi/α-Al2O3 Catalyst for CH4 Reforming with CO2

  • Zhaoyin HouAffiliated withChemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
  • , Osamu YokotaAffiliated withChemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
  • , Takumi TanakaAffiliated withChemical Research Group, Research Institute of Innovative Technology for the Earth (RITE)
  • , Tatsuaki YashimaAffiliated withChemical Research Group, Research Institute of Innovative Technology for the Earth (RITE) Email author 

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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.

CH4 dry reforming KCaNi catalyst TPR TPSR XPS