| K-Ce改性类水滑石前驱体Co-M—Al复合氧化物催化分解N2O |
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| 引用本文： | 张锦丽,;吴双,;胡辉,;吴高明,;曾召伟.K-Ce改性类水滑石前驱体Co-M—Al复合氧化物催化分解N2O[J].化学物理学报(中文版),2014(2):233-239. |
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| 作者姓名： | 张锦丽 ;吴双 ;胡辉 ;吴高明 ;曾召伟 |
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| 作者单位： | [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 |
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| 基金项目： | ACKNOWLEDGMENTS This work was supported by the National High-tech R＆D Program of China （No.2012AA062501） and the Postgraduates Innovation Foundation of Huazhong University of Science and Technology of China （No.HF- 08-11-2011-261）. We also thank the analytical support from Analytical and Testing Center of Huazhong University of Science ＆： Technology. |
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| 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，N20分解温度T50和马0均下降80℃；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℃.
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| 关 键 词： | N2O 催化分解 类水滑石 CeO2 碱金属 |
N2O Decomposition over K-Ce Promoted Co-M-AI Mixed Oxide Catalysts Prepared from Hydrotalcite-like Precursors |
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| Institution: | Jin-li Zhang, Shuang Wu, Hui Hua, Gao-ming Wu, Zhao-wei Zeng(a. School oF Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China b. Wuhan Iron and Steel (Group) Corp., Wuhan 430083, China) |
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| 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 compounds. 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 Ce02 improved the catalytic activity signif- icantly and made the decomposition temperatures at which the N2O conversion was 50% and 90% （T50 and Tgo） both decreased 80 ℃ 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 ℃. It is significant for decomposing N2O from industries and reducing carbon emission from atmosphere. |
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| Keywords: | N2O Catalytic decomposition Hydrotalcite-like compound CeO2 Alkalimetal |
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