Alkali/alkaline-earth metal-modified MnO_(x) supported on three-dimensionally ordered macroporous–mesoporous Ti_(x)Si+(1-x)O_(2) catalysts:Preparation and catalytic performance for soot combustion

作     者：Chao Peng Di Yu Chunlei Zhang Maozhong Chen LanyiWang Xuehua Yu Xiaoqiang Fan Zhen Zhao Kai Cheng Yongsheng Chen YuechangWei Jian Liu 

作者机构：Institute of Catalysis for Energy and EnvironmentCollege of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang 110034China State Key Laboratory of Heavy Oil ProcessingChina University of PetroleumBeijing 102249China Energy and Catalysis LaboratoryDepartment of Mechanical and Automation EngineeringThe Chinese University of Hong KongHong KongChina 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第125卷第3期

页      面：82-94页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by Key Research and Development Program of Ministry of Science and Technology of the People’s Republic of China (MOST) (No. 2017YFE0131200) for collaboration between China and Poland National Nature Science Foundation of China (NSFC) (Nos. 22072095, U1908204, 21761162016) General Projects of Liaoning Province Natural Fund (No. 2019-MS-284) National Engineering Laboratory for Mobile Source Emission Control Technology (No. NELMS2018A04) University level innovation team of Shenyang Normal University, Major Incubation Program of Shenyang Normal University (No. ZD201901) supported by the Research Grants Council (RGC) of Hong Kong through NSFC/RGC Joint Research Scheme (No. N_CUHK451/17) 

主　　题：Three-dimensionally ordered macroporous-mesoporous Ti_(0.7)Si_(0.3)O_(2) Alkali/alkaline-earth metals MnO_(x) Catalysts Preparation Soot combustion 

摘      要：The performance of catalysts used in after-treatment systems is the key factor for the removal of diesel soot,which is an important component of atmosphericfine particle ***,three-dimensionally ordered macroporous–mesoporous Ti_(x)Si+(1-x)O_(2)(3DOM-m Ti_(x)Si+(1-x)O_(2)) and its supported MnO_(x)catalysts doped with different alkali/alkaline-earth metals (AMnO_(x)/3 DOM-m Ti_(0.7)Si_(0.3)O_(2)(A:Li,Na,K,Ru,Cs,Mg,Ca,Sr,Ba)) were prepared by mesoporous template (P123)-assisted colloidal crystal template (CCT) and incipient wetness impregnation methods,*** characterizations of the catalysts were performed using scanning electron microscopy,X-ray diffraction,N_(2)adsorption–desorption,H_(2)temperature-programmed reduction,O_(2)temperature-programmed desorption,NO temperature-programmed oxidation,and Raman spectroscopy techniques;then,we evaluated their catalytic performances for the removal of diesel soot *** results show that the 3DOM-m Ti_(0.7)Si_(0.3)O_(2)supports exhibited a well-defined 3DOM-m nanostructure,and AMnO_(x)nanoparticles with 10–50 nm were evenly dispersed on the inner walls of the uniform *** addition,the as-prepared catalysts exhibited good catalytic performance for soot *** the prepared catalysts,CsMnO_(x)/3DOM-m Ti_(0.7)Si_(0.3)O_(2)had the highest catalytic activity for soot combustion,with T10,T50,and T90(the temperatures corresponding to soot conversion rates of 10%,50%,and 90%) values of 285,355,and 393℃,*** high catalytic activity of the CsMnO_(x)/3 DOM-m Ti_(0.7)Si_(0.3)O_(2)catalysts was attributed to their excellent low-temperature reducibility and homogeneous macroporous–mesoporous structure,as well as to the synergistic effects between Cs and Mn species and between CsMnO_(x)and the Ti_(0.7)Si_(0.3)O_(2)support.