塩化第一鉄の高温加水分解反応を利用するH₂Sの熱化学分解について

抄録

The two-stage thermochemical cycle was proposed as described below in this research and experimental studies were made on this cycle. Fe₃O₄+6HC1+H₂S→ 3FeCl₂+4H₂O+S° 3FeCl₂+4H₂O→ Fe₃O₄+6HCl+H₂/H₂S→ H₂+S°
The activation energy for the dissolution of Fe₃0₄ is found to be about 84 kJ/mol under different conditions and the rate is controlled by the surface reaction. It is shown that the rate is dominantly affected by the concentration of ferrousion rather than by the Fe₃+/Fe₂+ ratio in the solution, and the addition of a large amount of ferrous chloride causes a marked acceleration of the dissolution rate.
It is also shown that the reduction of ferric ion with hydrogen sulfide proceeds easily and the rate is controlled by an absorption rate of hydrogen sulfide into the acid solution.
Experimental results on pyrohydrolysis of solid ferrous chloride can be accounted for by considering gaseous FeO as a transient intermediate.