Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures
Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures
复制标题
Mn-Ce混合氧化物催化剂上NH3低温选择性催化还原NOx
DOI：
10.1016/j.cattod.2013.06.009
复制
发表时间：
2013-11-01
期刊：
影响因子：
5.3
通讯作者：
Wang, Jinggang
中科院分区：
文献类型：
--
作者：
Liu, Zhiming;Yi, Yang;Wang, Jinggang
采用表面活性剂模板法（ST）和常规共沉淀法（CP）制备了一系列不同Mn/Ce摩尔比的Mn-Ce复合氧化物催化剂，用于低温氨选择性催化还原NOx（NH3-SCR）反应。催化剂的制备方法对催化剂的活性有显著影响，ST法制备的Mn-Ce复合氧化物催化剂的活性高于CP法制备的催化剂。ST法制备的Mn-Ce复合氧化物催化剂在100-200 ℃范围内的NOx转化率接近100%。此外，它对H2O和SO2的耐受性更高。ST法制备的Mn-Ce复合氧化物催化剂具有较高的比表面积，有利于NH3和NOx的吸附和活化，从而促进NOx还原反应的进行。(C)2013爱思唯尔有限公司版权所有。
A series of Mn-Ce mixed oxide catalysts with different molar ratio of Mn/Ce were prepared by the surfactant template (ST) method and conventional co-precipitation (CP) method for the selective catalytic reduction of NOx with ammonia (NH3-SCR) at low temperatures. Catalyst preparation method exerts significant influence on the catalytic performance, and Mn-Ce mixed oxide catalyst prepared by ST method is more active than that prepared by CP method. The best Mn-Ce mixed oxide catalyst prepared by ST method yielded nearly 100% NOx conversion in the temperature range of 100-200 degrees C. Moreover, its resistance against H2O and SO2 is higher. The high surface area of Mn-Ce mixed oxide catalyst prepared by the ST method could contribute to the adsorption and activation of NH3 as well as NOx, thus promoting the NOx reduction to proceed. (C) 2013 Elsevier B.V. All rights reserved.