Effet de l'ajout alcalino-terreux sur les propriétés catalytiques de Co/SiO^sub 2^ en réaction CH^sub 4^ + CO ^sub 2

The dry reforming of methane is carried out on Co/SiO^sub 2^ modified catalysts. The catalytic activity and stability of the prepared catalysts are closely depending on MgO, SrO or BaO additives. Thus, it was shown that the addition of these oxides to the Co/SiO^sub 2^ reference sample revealed a very positive effect on the resistance to carbon deposition and contributed therefore the observed catalytic stability by gasification of surface carbon species. [PUBLICATION ABSTRACT]