Effect of Metal Oxide Additives on Hydrogen Production in the Steam-Iron Process

철-수증기 반응에 의한 수소생성에 미치는 금속산화물의 첨가효과

  • Lee, Dae-Haeng (Department of Chemical Technology, Chonnam National University) ;
  • Moon, Hee (Department of Chemical Technology, Chonnam National University) ;
  • Park, Heung-Chul (Department of Chemical Technology, Chonnam National University)
  • 이대행 (전남대학교 공과대학 공업화학과) ;
  • 문희 (전남대학교 공과대학 공업화학과) ;
  • 박흥철 (전남대학교 공과대학 공업화학과)
  • Received : 1990.10.08
  • Published : 1991.03.25

Abstract

The production 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 $$MoO_3{\gg}In_2O_3{\sim_=}WO_3{\sim_=}CuO$$. 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, $600-750^{\circ}C$, 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 27.9 kJ/mol with $MoO_3$, $In_2O_3$, $WO_3$, CuO and without additive, respectively.

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