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Synergetic Promotional Effects Between Cerium Oxides and Manganese Oxides for NH3-Selective Catalyst Reduction Over Ce-Mn/TiO2
Wang, Zaihua1,2; Li, Xinjun1; Song, Wenji1; Chen, Jinfa1; Li, Tao1; Feng, Ziping1
2011-06-01
Source PublicationMATERIALS EXPRESS
Volume1Issue:2Pages:167-175
AbstractCe and Mn codoped Ce-Mn/TiO2 catalysts were synthesized by sol-gel method and were used as model catalysts to investigate the synergetic promotional effects between cerium oxides and manganese oxides for selective catalytic reduction of NO by NH3. The catalysts were characterized by SEM, XRD, XPS, and temperature-programmed hydrogen reduction (H-2-TPR) and ammonia desorption (NH3-TPD) techniques. The experimental results showed that cerium oxides and manganese oxides affected each other, and their catalystic activities improved both at low and high temperatures. The catalysts yielded more than 90% NOx conversion in the temperature range 250-450 degrees C and W/F of 0.00125 g min mL(-1) (W/F represents the ratio of the catalyst weight to the gas flow rate). It was suggested that the mobility of oxygen species enhanced through the sandwiched structure sic-Mn-O-Ce (sic represents the oxygen vacancy), leading to the enhancement of the NOx conversion over Ce-Mn/TiO2 significantly. Moreover, the Ce and Mn codoping improved the acid concentration with both medium acid sites and strong acid sites. Ce doping inhibited the growth of crystal size of TiO2, while Mn doping had little influence on it.
SubtypeArticle
KeywordCerium Oxide Manganese Oxide Oxygen Transfer Synergetic Promotional Effect Selective Catalytic Reduction
WOS HeadingsScience & Technology ; Technology
DOI10.1166/mex.2011.1017
WOS Subject ExtendedScience & Technology - Other Topics ; Materials Science
WOS KeywordLOW-TEMPERATURE SCR ; NITRIC-OXIDE ; MIXED OXIDES ; CARBON-MONOXIDE ; PREFERENTIAL OXIDATION ; MNOX-CEO2 CATALYST ; NH3 ; NO ; AMMONIA ; CO
Indexed BySCI
Language英语
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000311913600008
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10418
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zaihua,Li, Xinjun,Song, Wenji,et al. Synergetic Promotional Effects Between Cerium Oxides and Manganese Oxides for NH3-Selective Catalyst Reduction Over Ce-Mn/TiO2[J]. MATERIALS EXPRESS,2011,1(2):167-175.
APA Wang, Zaihua,Li, Xinjun,Song, Wenji,Chen, Jinfa,Li, Tao,&Feng, Ziping.(2011).Synergetic Promotional Effects Between Cerium Oxides and Manganese Oxides for NH3-Selective Catalyst Reduction Over Ce-Mn/TiO2.MATERIALS EXPRESS,1(2),167-175.
MLA Wang, Zaihua,et al."Synergetic Promotional Effects Between Cerium Oxides and Manganese Oxides for NH3-Selective Catalyst Reduction Over Ce-Mn/TiO2".MATERIALS EXPRESS 1.2(2011):167-175.
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