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Interaction between support and V2O5 in the selective catalytic reduction of NO by NH3
Alternative TitleCatal. Sci. Technol.
Guo, Feng1,2; Yu, Jian1; Chu, Mo2; Xu, Guangwen1
2014
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume4Issue:7Pages:2147-2155
AbstractV2O5-based catalysts for NH3-selective catalytic reduction (SCR) have been prepared by an impregnation method using different supports including nano-TiO2, meso-TiO2, nano-ZrO2, meso-Al2O3 and meso-SiO2. Activity evaluations clarified that V2O5/meso-TiO2 possessed the highest activity and a wide activitytemperature window of 240-400 degrees C, while V2O5/ nano-TiO2 and V2O5/ nano-ZrO2 had activities were the next most active to V2O5/ meso-TiO2. The realized NO removal was lowest over V2O5/meso-Al2O3 and V2O5/ meso-SiO2. In flue gas with 900 ppm SO2 and 10 vol.% steam the catalyst V2O5/meso-TiO2 showed the best activity stability at 350 degrees C and 240 degrees C. Characterizing the catalysts revealed that the differences in their redox properties and acidities should be responsible for their different activities and poisoning resistance. The dispersion of V2O5 on all the supports obviously decreased its H-2-reduction temperature, and the lower the reduction temperature, the better the catalyst appeared to be in activity and poisoning resistance. Overall, only the TiO2 support and its consequent interactions with V2O5 guaranteed the expected good activity and also poisoning resistance for NH3-SCR of NO. The higher pore volume of meso-TiO2 enabled a larger tolerance capacity to ammonium sulfate and sulfite so that this catalyst had better low-temperature activity stability.; V2O5-based catalysts for NH3-selective catalytic reduction (SCR) have been prepared by an impregnation method using different supports including nano-TiO2, meso-TiO2, nano-ZrO2, meso-Al2O3 and meso-SiO2. Activity evaluations clarified that V2O5/meso-TiO2 possessed the highest activity and a wide activitytemperature window of 240-400 degrees C, while V2O5/ nano-TiO2 and V2O5/ nano-ZrO2 had activities were the next most active to V2O5/ meso-TiO2. The realized NO removal was lowest over V2O5/meso-Al2O3 and V2O5/ meso-SiO2. In flue gas with 900 ppm SO2 and 10 vol.% steam the catalyst V2O5/meso-TiO2 showed the best activity stability at 350 degrees C and 240 degrees C. Characterizing the catalysts revealed that the differences in their redox properties and acidities should be responsible for their different activities and poisoning resistance. The dispersion of V2O5 on all the supports obviously decreased its H-2-reduction temperature, and the lower the reduction temperature, the better the catalyst appeared to be in activity and poisoning resistance. Overall, only the TiO2 support and its consequent interactions with V2O5 guaranteed the expected good activity and also poisoning resistance for NH3-SCR of NO. The higher pore volume of meso-TiO2 enabled a larger tolerance capacity to ammonium sulfate and sulfite so that this catalyst had better low-temperature activity stability.
KeywordOxide Catalysts Nitric-oxide Mixed Oxides Ammonia Scr Zirconia Removal Vanadia Spectroscopy Temperatures
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c4cy00098f
URL查看原文
Indexed BySCI
Language英语
WOS KeywordOXIDE CATALYSTS ; NITRIC-OXIDE ; MIXED OXIDES ; AMMONIA ; SCR ; ZIRCONIA ; REMOVAL ; VANADIA ; SPECTROSCOPY ; TEMPERATURES
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000337132100034
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10907
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Guo, Feng,Yu, Jian,Chu, Mo,et al. Interaction between support and V2O5 in the selective catalytic reduction of NO by NH3[J]. CATALYSIS SCIENCE & TECHNOLOGY,2014,4(7):2147-2155.
APA Guo, Feng,Yu, Jian,Chu, Mo,&Xu, Guangwen.(2014).Interaction between support and V2O5 in the selective catalytic reduction of NO by NH3.CATALYSIS SCIENCE & TECHNOLOGY,4(7),2147-2155.
MLA Guo, Feng,et al."Interaction between support and V2O5 in the selective catalytic reduction of NO by NH3".CATALYSIS SCIENCE & TECHNOLOGY 4.7(2014):2147-2155.
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