[1]赵晓媛,张亚平,仲佳鑫,等.超声波浸渍法制备MnOx/TiO2催化剂低温选择性催化还原NO[J].东南大学学报(自然科学版),2011,41(6):1225-1230.[doi:10.3969/j.issn.1001-0505.2011.06.019]
 Zhao Xiaoyuan,Zhang Yaping,Zhong Jiaxin,et al.MnOx/TiO2 catalysts prepared by ultrasonic impregnation for low temperature selective catalytic reduction of NO[J].Journal of Southeast University (Natural Science Edition),2011,41(6):1225-1230.[doi:10.3969/j.issn.1001-0505.2011.06.019]
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超声波浸渍法制备MnOx/TiO2催化剂低温选择性催化还原NO()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第6期
页码:
1225-1230
栏目:
环境科学与工程
出版日期:
2011-11-20

文章信息/Info

Title:
MnOx/TiO2 catalysts prepared by ultrasonic impregnation for low temperature selective catalytic reduction of NO
作者:
赵晓媛张亚平仲佳鑫孙克勤徐海涛周长城
(东南大学能源与环境学院,南京 210096)
Author(s):
Zhao XiaoyuanZhang YapingZhong JiaxinSun KeqinXu HaitaoZhou Changcheng
(School of Energy and Environment, Southeast University, Nanjing 210096, China)
关键词:
MnOx/TiO2 催化剂 超声波 浸渍法 低温选择性催化还原
Keywords:
MnOx/TiO2 catalyst ultrasonic impregnation low-temperature SCR(selective catalytic reduction)
分类号:
X511
DOI:
10.3969/j.issn.1001-0505.2011.06.019
摘要:
采用超声波浸渍法、传统浸渍法和溶胶凝胶法制备了一系列的MnOx/TiO2催化剂,采用X射线衍射(XRD)、比表面积测定(BET)、原位红外(in situ FT-IR)、高分辨率扫描电镜(HRTEM)程序升温还原(TPR)等技术进行表征,同时在模拟氨气选择性催化还原NO的反应条件下(NH3-SCR)对催化剂的低温反应活性进行了考察.研究表明:超声波在催化剂制备过程中的应用对MnOx的分散、催化剂的表面酸性和脱硝反应活性产生了重要的影响; 超声浸渍法制备的MnOx/TiO2催化剂表现出较好的反应活性,特别在低温窗口(120℃以下),100℃时的脱硝效率达到了90%.对其进行的各项表征结果显示:催化剂比表面积较大,Ti和Mn具有较强的相互作用,催化剂表面具有较多的Lewis酸位和较高的Mn原子浓度,并且出现了SCR中间产物NH2.
Abstract:
A series of MnOx/TiO2 catalysts were prepared by ultrasonic impregnation, traditional impregnation and sol-gel methods. Their properties were studied by using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface measurement, high-resolution transmission electron microscope (HRTEM), in situ Fourier transform infrared spectroscopy (in situ FT-IR) and temperature programmed reduction(TPR) techniques and their catalytic performance for the selective catalytic reduction of NO with NH3(NH3-SCR)was investigated. It is found that the use of ultrasonic in the solution impregnation for preparing MnOx/TiO2 catalysts has significant effect on the dispersion behavior and surface acid property of manganese oxide on TiO2 as well as the catalytic activity. MnOx/TiO2catalysts prepared by UI (ultrasonic impregnation) method exhibits higher catalytic activity; especially at temperature below 120℃. NO conversion rate at 100℃ is about 90%. The characterization results indicate that the catalyst shows larger specific BET surface area; Ti and Mn have strong interaction; there is a significant amount of Lewis acidity and high concentration of Mn atom as well as the formation of abundant NH2 on the surface.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 赵晓媛(1985—),女,硕士生; 张亚平(联系人),女,博士,讲师,amflora@seu.edu.cn.
基金项目: 国家高技术研究发展计划(863计划)资助项目(2007AA061802)、江苏省自然科学基金重点资助项目(BK2008001).
引文格式: 赵晓媛,张亚平,仲佳鑫,等.超声波浸渍法制备MnOx/TiO2催化剂低温选择性催化还原 NO[J].东南大学学报:自然科学版,2011,41(6):1225-1230. [doi:10.3969/j.issn.1001-0505.2011.06.019]
更新日期/Last Update: 2011-11-20