reforming, oxidative conversion and simultaneous oxidative con-CO 2 version and or steam reforming of methane to syngas (CO and over CO 2 H 2 ) NiOÈCoOÈMgO (Co : Ni : Mg \ 0É5 : 0É5 : 1É0) solid solution at 700È850¡C and high space velocity (5É1 ] 105 cm3 g~1 h~1 for oxidative conversion and 4É5 ] 104 cm3 g~1 h~1 for oxy-steam or reforming) for di †erent oxy-CO 2 (1É8È8É0) and or (1É5È8É4) ratios have been thoroughly CH 4 /O 2 CH 4 /CO 2 H 2 O investigated. Because of the replacement of 50 mol% of the NiO by CoO in NiOÈMgO (Ni/Mg \ 1É0), the performance of the catalyst in the methane to syngas conversion process is improved ; the carbon formation on the catalyst is drastically reduced. The CoOÈNiOÈMgO catalyst shows high methane conversion activity (methane conversion [ 80%) and high selectivity for both CO and in the reforming and oxy-steam reforming processes at P800¡C. H 2 oxy-CO 2 The oxy-steam or reforming process involves the coupling of the exothermic CO 2 oxidative conversion and endothermic
or steam reforming reactions, CO 2 making these processes highly energy efficient and also safe to operate. These processes can be made thermoneutral or mildly exothermic or mildly endothermic by manipulating the process conditions (viz. temperature and/or ratio in the feed).