Reduction and oxidation kinetics of NiWO₄ as an oxygen carrier for hydrogen storage by a chemical looping process

Abstract

H2 storage of NiWO4 with a volumetric storage density of 496 g L−1 was studied and evaluated under a chemical looping reaction scheme by TGA. Results confirms the high potential of NiWO4 to current oxygen carriers reported in the literature.

The Effects of Ce and W Promoters on the Performance of Alumina-Supported Nickel Catalysts in CO2 Methanation Reaction

“…Nickel aluminate and tungstate species show low reducibility; hence, to restrict formation of such phases, the calcination of catalysts was performed at relatively low temperature (400 • C) [20,21,32]. It seems, that the degree of the oxidation state of Ni 2+ in NiO crystallites essentially does not change during thermal treatment; however, it is worth noting that Ni 3+ sites can be formed under certain conditions [33].…”