Sb-Br系ハイブリッド水素製造プロセスの提案

抄録

A new hybrid thermochemical hydrogen production process, Sb-Br hybrid process, is presented together with relevant preliminary experimental data. The process consists of the following three steps.
1/2Sb₂O₃(s)+Br₂(l)+H₂O(l)Lowt temp./1/2Sb₂O₃(s)+2HBr(aq)(1)
2HBr(aq)Electrolysis H₂(g)+Br₂(l)(2)
1/2 Sb₂O₅(s) high temp. 1/2 Sb₂O₈(s) + 1/2 O₂(g)(3)
The main reaction (1) was completed in about 2 h at 303 K to produce a 32 wt% HBr solution at optimum conditions. Reactions (2) and (3) already verified make the Sb-Br hybrid process feasible. A flow sheet estimation showed that the overall efficiency of this process, η_LRVwas 35-40%. when heat recovery was 70-80%.