금속산화물 CuO, In_2O_3, MoO_3, WO_3을 첨가시킨 환원철에 의한 수증기로부터 수소생성을 반응속도론적 관점에서 조사하였다. 첨가제는 수소생성에 대한 활성증진효과를 나타내었으며, 크기의 순서는 MoO_3>> In_2O_3 ○ WO_3 ○ CuO 이었다. 속도해석에서 반응완료시간을 예측하기 위하여 수축 핵 모델(Shrinking Core Model) 을 적용한 추산결과는 실험치와 대체로 잘 일치하였다. 상압 유동식 반응장치를 이용하여 600-750℃의 온도와 첨가제의 양 lwt%, Ar유량 1L/min, 수증기분압 0.085 atm에서 얻어진 겉보기 활성화에너지는 환원철 단독의 경우 27.9kJ/mol, 첨가제 MoO_3는 14.2, In_2O_3는 20.9, WO_3은 21.3, CuO는 22.4kJ/mol을 각각 나타내었다.

The prodution of hydrogen from steam by reduced iron with additives such as CuO, In_2O_3, MoO_3 and WO_3 has been kinetically investigated. It was shown that all additives have a promoting effect on reaction activity in the order of MoO_3>> In_O_3 ○ WO_3 ○ CuO. The shrinking core model was applied to predict the complete conversion time and the results were quite comparable with experimental values. The reaction was carried out in a fixed flow reactor packed with reduced iron with 1 wt % of additives under the conditions, 600-750 ℃, Ar flow rate of 1 L/min and steam partial pressure of 0.085 atm. The apparent activation energies were 14.2, 20.9, 21.3, 22.4 and 27.9k/mol with CuO, In_2O_3, MoO_3, WO_3, CuO and without additive, respectively.