N2O Decomposition over K-Ce Promoted Co-M-Al Mixed Oxide Catalysts Prepared from Hydrotalcite-like Precursors
- Received Date: 2013-10-29
Abstract: A series of mixed oxide catalysts with different composition of Co-M-Al and Co-M-Ce-Al (M=Zn, Ni, Cu) were prepared by co-precipitation method from hydrotalcite-like com-pounds. The experimental results revealed the catalytic activity of Co-Ni-Al is slightly higher than that of Co-Zn-Al and much higher than that of Co-Cu-Al for direct decomposition of N2O. Moreover, addition of small amounts of CeO2 improved the catalytic activity signif-icantly and made the decomposition temperatures at which the N2O conversion was 50% and 90% (T50 and T50) both decreased 80 oC than those of Co-M-Al catalysts without CeO2 added. Further, potassium-load also promoted the catalytic activity, and the decomposi-tion temperatures of T50 and T90 both decreased approximately 50 oC. It is significant for decomposing N2O from industries and reducing carbon emission from atmosphere.
|Citation:||Jin-li Zhang, Shuang Wu, Hui Hu, Gao-ming Wu, Zhao-wei Zeng. N2O Decomposition over K-Ce Promoted Co-M-Al Mixed Oxide Catalysts Prepared from Hydrotalcite-like Precursors[J]. Chinese Journal of Chemical Physics , 2014, 27(2): 233-239. doi: 10.1063/1674-0068/27/02/233-239|