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N2O Decomposition over K-Ce Promoted Co-M-Al Mixed Oxide Catalysts Prepared from Hydrotalcite-like Precursors
Jin-li Zhang,Shuang Wu,Hui Hu*,Gao-ming Wu*,Zhao-wei Zeng
Author NameAffiliationE-mail
Jin-li Zhang School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China  
Shuang Wu School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China  
Hui Hu* School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China zjlzjl@hust.edu.cn 
Gao-ming Wu* Wuhan Iron and Steel (Group) Corp., Wuhan 430083, China gm_wu1031@163.com 
Zhao-wei Zeng School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China  
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.
Key words:  N2O, Catalytic decomposition, Hydrotalcite-like compound, CeO2, Alkali metal
FundProject:
K-Ce改性类水滑石前驱体Co-M-Al复合氧化物催化分解N2O
张锦丽,吴双,胡辉*,吴高明*,曾召伟
摘要:
采用共沉淀法制备不同组分类水滑石前驱体Co-M-Al和Co-M-Ce-Al (M=Zn, Ni, Cu)复合氧化物催化剂催化分解N2O. 结果表明,Co-M-Al系列氧化物催化剂的催化活性Co-Ni-Al系列>Co-Zn-Al系列>Co-Cu-Al系列;CeO2添加使得催化剂催化活性进一步提高,N2O分解温度T50和T90均下降80 oC;继续负载碱金属K也使氧化物催化剂催化活性提高,N2O分解温度T50和T90下降约50 oC.
关键词:  N2O,催化分解,类水滑石,CeO2,碱金属
DOI:10.1063/1674-0068/27/02/233-239
分类号: