Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Kinetics and Mechanism of the Oxidation of Carbon Monoxide on H$_2$-Reduced NiO-Doped $\alpha$-Fe$_2O_3$

  • Kim, Don (Department of Chemistry, Yonsei University) ;
  • Kim, Keu-Hong (Department of Chemistry, Yonsei University) ;
  • Choi, Jae-Shi (Department of Chemistry, Yonsei University)
  • Published : 1988.04.20
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Abstract

The CO oxidation was performed on $H_2$-reduced NiO-${\alpha}-Fe_2O_3$ in the temperature range 150-$250^{\circ}C$. The kinetic study and the conductivity measurements indicate the oxidation reaction follows Langmuir-Rideal type process that is uncommon in heterogeneous catalyst$^1$. No active site is found on the catalyst surface for CO adsorption, but an oxygen vacancy adsorbs an oxygen, and this step is rate initiation. The partial orders are half for $O_2$ and first for CO, respectively. Apparent activation energy for over-all reaction is 9.05 kcal/mol.

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References

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