Methanation of CO 2 over High Surface Nickel/Aluminates Compounds Prepared by a Self-Generated Carbon Template

Catalytic gas-phase hydrogenation of CO 2 into CH 4 was tested under three different nickel/aluminate catalysts obtained from precursors of hexaaluminate composition (MAl 16 O 19 , M = Mg, Ca, Ba). These catalysts were prepared using a carbon template method, where carbon is self-generated from a sol-gel that contains an excess of citric acid and the Al and M salts (Ba 2+ , Ca 2+ , Mg 2+ ) by two-step calcination in an inert/oxidizing atmosphere. This procedure yielded Ni particles decorating the surface of a porous high surface area matrix, which presents a typical XRD pattern of aluminate st... Mehr ...