Preparation, structure and reactivityof Ca pellets for theurt--3 thermochemical hydrogen production cycle

摘要

Hydrogen production using a clean heat source such as solar energy is essential for hydrogen economics in the future. The UT-3 cycleis a promising thermochemical water decomposition process that produces hydrogen using thermal enerty and consists of four gas-solid reactions (1): CaBr_2(s)+H_2O(g) -> CaO(s)+2HBr(g) CaO((s) + (Br_2(g) -> CaBr_2 (s) + 1/2O_2 (g) Fe_3O_4(s) + 8HBr (g) -> 3FeBr_2 (s) + 4H_2O(g) + Br_2(g) 3FeBr_2 (s) + 4 H_2O(g) Fe_3O_4 (s) + 6HBr (g) + H_2 (g).