引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 2155次   下载 1641 本文二维码信息
码上扫一扫!
分享到: 微信 更多
N2O Decomposition over K-Ce Promoted Co-M-Al Mixed Oxide Catalysts Prepared from Hydrotalcite-like Precursors
Jin-li Zhang1, Shuang Wu1, Hui Hu*1, Gao-ming Wu*2, Zhao-wei Zeng1
1.School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2.Wuhan Iron and Steel (Group) Corp., Wuhan 430083, 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1, 吴双1, 胡辉*1, 吴高明*2, 曾召伟1
1.华中科技大学环境科学与工程学院,武汉430074;2.武汉钢铁(集团)公司,武汉430083
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: