Doping Effect of CdO on the Oxidation of Carbon Monoxide over CdO-${\alpha}-Fe_2O_3$System

CdO-${\alpha}-Fe_2O_3$촉매상에서 일산화탄소의 산화반응에 대한 CdO의 첨가 효과

  • 이성한 (연세대학교 이과대학 화학과) ;
  • 김용록 (연세대학교 이과대학 화학과) ;
  • 김규홍 (연세대학교 이과대학 화학과) ;
  • 최재시 (연세대학교 이과대학 화학과)
  • Published : 1985.04.20

Abstract

The oxidation reaction of CO on the catalysts 4 mol%, 8 mol%, and 12 mol% Cd-doped ${\alpha}-Fe_2O_3$ is individually investigated. Regardless of Cd doping level, over-all reaction order for the oxidation of CO is 1.5; the first order with respect to CO and the one-half order with respect to $O_2$. Over the temperature range of 350∼$460^{\circ}C$, the activation energy for CO oxidation is 10.10∼11.30Kcal/mol. From the agreement between the kinetic data and conductivity measurements, the reaction mechanism is suggested. Especially from the effect of Cd doping, the fact that catalytic activity of ${\alpha}-Fe_2O_3$ is due to the excitation of electrons which are traped on oxygen vacancy is found, and the adsorption sites for reactant molecules are found.

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