Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (01): 50-56.doi: 10.3866/PKU.WHXB19990110

• ARTICLE • Previous Articles     Next Articles

Catalytic Reduction of NO by CO with Hydrotalcite Derived Mixed Oxides

Wang Xue-Zhong, Liu Yu-Min, Wu Yue   

  1. Changchun Institute of Applied Chemistry,Changchun 130022
  • Received:1998-03-20 Revised:1998-07-27 Published:1999-01-15
  • Contact: Wu Yue

Abstract:

Catalysts with spinel structure derived from Hydrotalcite-like Compounds (HTLcs) containing cobalt have been investigated in NO catalytic reduction by CO. It was found that catalysts with spinel structures derived from HTLcs had obviously higher activity than that prepared from general methods. A two-step reaction was observed during the reaction curse: NO was first reduced to N2O by CO, and with the increase of temperature, the N2O was reduced to N2. The reactivity of the catalysts studied increased with the amount of cobalt-content in the catalyst, and decreased with the calcination temperature. The crystal defect would play and important role in the reaction.

Key words: Hydrotalcite-like compounds, Spinel, CO, Reduction of NO