Selective catalytic reduction of NO_x by hydrogen over modified Pd/TiO_2-Al_2O_3 catalyst under lean-burn conditions

作     者：Kaijiao Duan Zhiming Liu Lei Yuan 

作者机构：State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2014年第59卷第31期

页      面：3973-3979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] 

基　　金：supported by the National Natural Science Foundation of China (21377010) the Fundamental Research Funds for the Central Universities (YS1401) the Program for New Century Excellent Talents in University,Ministry of Education,China (NCET-13-0650) 

主　　题：选择性催化还原 氧化铝催化剂 TiO2 NOx PdO 燃烧条件 改性 Al2O3 

摘      要：A series of Ni,Sn and Ca modified Pd/TiO2-Al2O3catalysts were prepared by the incipient wetness impregnation method and their catalytic performance for the selective catalytic reduction of NOxby H2was *** results showed that the NOxconversion and N2selectivity were improved over Pd-Sn/TiO2-Al2O3and Pd-Ni/TiO2-Al2O3catalysts above 200°*** importantly,the N2selectivity and high-temperature activity of Pd-Sn/TiO2-Al2O3catalyst was far superior to the single Pd/*** optimal Sn loading was 2 wt.%.X-ray diffraction(XRD)results showed that the interaction between Pd and Sn promotes the dispersion of Pd over ***-programmed reduction(H2-TPR)results demonstrated that the addition of Sn contributes to the formation of Pd0and improving the redox property of Pd/*** additives of Ni and Sn also facilitated the absorption of NOxand the oxidation of NO to NO2,which play important roles in the selective catalytic reduction of NOxby hydrogen.