东南大学学报（自然科学版）2011，Vol.41Issue(6)：1225-1230,6.DOI:10.3969/j.issn.1001-0505.2011.06.019
超声波浸渍法制备MnOx/TiO2催化剂低温选择性催化还原NO
MnOx/TiO2 catalysts prepared by ultrasonic impregnation for low temperature selective catalytic reduction of NO
摘要
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.关键词
MnOx/TiO2催化剂/超声波/浸渍法/低温选择性催化还原Key words
MnOx/TiO2 catalyst/ultrasonic/impregnation/low-temperature SCR(selective catalyt-分类
资源环境引用本文复制引用
赵晓媛,张亚平,仲佳鑫,孙克勤,徐海涛,周长城..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):1225-1230,6.基金项目
国家高技术研究发展计划(863计划)资助项目(2007 AA061802)、江苏省自然科学基金重点资助项目(BK2008001). （863计划）
