Thermochemical cycle based on solid intermediates for hydrogen storage and on-demand production

Thermochemical water splitting processes based on Sulfur-Iodine cycle can be conveniently improved using solid intermediates, in order to increase the global yield and avoid use of concentrated acid at high temperatures. In this context, an innovative process has been conceived, where a metal oxide, namely NiO, is reduced into oxygen correspondent metal, which suitably stored reacted with steam hydrogen when necessary. Data previously obtained published, together integration experimental results have used evaluate technical feasibility heat duties each step proposed cycle. The starting point was Nickel compounds already extensively characterized, modified low toxic Iron (III) species as intermediates for formation. Based theoretical analysis carried out, resulting thermal efficiency quite promising, about 19%, also taking account generation step.