LAUSR

Abstract ZrO2 supported Nickel catalyst, 9 wt%WO3 -91 wt%ZrO2 supported Nickel catalyst and ceria promoted 9 wt%WO3-91 wt%ZrO2 supported Nickel catalyst (5NixCe/WZr catalyst) is synthesized via wet impregnation and characterized by XRD, UV–vis, CO2 -TPD, H2 TPR-CO2 TPD-H2 TPR cycle, TPH, TPH followed by O2 -TPO and CO2 -TPD followed by O2 -TPO. Due to limitation in surface re-oxidizing capability and shading of catalytic active sites by thermally stable carbonates; catalytic activity of unpromoted catalyst system is less. 5NixCe/WZr catalyst has extended CH4 decomposition sites, additional basic sites (during the reaction) for CO2 adsorption and excellent redox accompany (Ce +4/Ce +3, W+6/W +4) for carbon oxidation and re-oxidizing capability of surface up to the pristine level. 2.5 wt% Ceria promotional addition is resulted into 78% H2 yield constantly up to 420 min TOS. The carbon deposit over ceria promoted system (up to 2.5 wt%) is amorphous type, more easily/moderately reducible, oxidizable and removable.