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The LaNi 1– x  Co  x  O 3  ( x  = 0, 0.2, 0.4, 0.6, 0.8 and 1) perovskites were prepared by the citrate sol–gel method. The prepared compounds were characterized by using XRD, BET, ICP, SEM, EDS, TEM, TPR and TGA techniques, under the condition of as-synthesized and used samples. The results showed that the highly homogeneous and pure solids with particle sizes in the range of nanometers were obtained through this synthesis method. The XRD patterns of fresh catalysts indicated the formation of well-crystallized perovskite structure with LaNiO 3  and LaCoO 3  as the main phases present on the solids depending on the amount of Co-substitution. TPR analysis revealed that the reduction of the solids was more difficult when increasing the degree of substitution ( x ). The effects of the partial substitution of Ni by Co and reaction temperatures at atmospheric pressure were investigated in the combined reforming of methane with CO 2  and O 2  (CRM), after reduction of the samples under hydrogen. LaNiO 3  exhibited high activity and selectivity without coke formation between all of the studied perovskites. For LaNi 1– x  Co  x  O 3  perovskites, it was observed a trend to decrease the catalytic activity with increasing the Co-doping level.

Syngas Production from Reforming of Methane with CO 2 and O 2 over LaNi 1– x Co x O 3 Perovskites