Selective catalytic reduction of NO by NH3 over Fe2O3-promoted V2O5/TiO2-based catalysts with high Fe2O3-to-V2O5 ratios
DC Field | Value | Language |
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dc.contributor.author | Thi Phuong Thao Nguyen | - |
dc.contributor.author | Yang, Ki Hyuck | - |
dc.contributor.author | Kim, Moon Hyeon | - |
dc.contributor.author | Hong, Yong Seok | - |
dc.date.accessioned | 2021-12-04T14:00:18Z | - |
dc.date.available | 2021-12-04T14:00:18Z | - |
dc.date.created | 2021-08-30 | - |
dc.date.issued | 2021-01-15 | - |
dc.identifier.issn | 0920-5861 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/129375 | - |
dc.description.abstract | Fe2O3-promoted V2O5-WO3/TiO2 catalysts with high Fe2O3-to-V2O5 ratios (3.4-6) have been prepared for the selective reduction of NO with NH3 (NH3-SCR) and extensively characterized using various spectroscopic measurements. No crystalline iron oxides were indicated even for 8% Fe2O3-promoted V2O5-WO3/TiO2 but alpha-Fe2O3 crystallites were observed in a XRD pattern for 7.04 % Fe2O3-promoted WO3/TiO2. Both Raman and XPS measurements suggest the formation of Fe-O-V species which may make a better N-2 selectivity in NH3-SCR reaction at high temperatures. All Fe2O3-promoted catalysts showed a great depression on N2O formation. At temperatures > 400 degrees C, samples with 5.46 and 8% Fe2O3(Fe2O3/V2O5 ratio = 3.4 and 5) gave significantly lower N2O production levels compared with the unpromoted and lower Fe2O3 loading catalysts. However, increasing in Fe2O3 loading resulted in a decrease in high temperature deNO(x) activity due to the oxidation of NH3 into NO. All the 3.4 and 5 ratio catalysts after a hydrothermal aging at 550 degrees C for 10 h gave NO removal activity and N2O formation similar to those measured over non-aged ones. However, such an aging at 750 degrees C could lead to a considerable increase in N2O formation even for the 5.46 % Fe2O3-promoted catalyst. Fe2O3-promoted V2O5/TiO2-based catalysts could catalyze the reduction of gas-phase N2O by NH3 adsorbed strongly, suggesting that this reaction may be a major route to greatly suppress N2O formation, consistent with infrared studies showing a reaction between N2O and surface NH3 species strongly adsorbed on the catalysts. This surface reaction could readily occur from a temperature as low as 250 degrees C. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER | - |
dc.subject | V2O5-WO3/TIO2 CATALYSTS | - |
dc.subject | RAMAN-SPECTROSCOPY | - |
dc.subject | N2O FORMATION | - |
dc.subject | XPS SPECTRA | - |
dc.subject | THIN-FILMS | - |
dc.subject | OXIDE | - |
dc.subject | SCR | - |
dc.subject | OXIDATION | - |
dc.subject | ADSORPTION | - |
dc.subject | FE2O3 | - |
dc.title | Selective catalytic reduction of NO by NH3 over Fe2O3-promoted V2O5/TiO2-based catalysts with high Fe2O3-to-V2O5 ratios | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Hong, Yong Seok | - |
dc.identifier.doi | 10.1016/j.cattod.2020.02.021 | - |
dc.identifier.scopusid | 2-s2.0-85080068168 | - |
dc.identifier.wosid | 000595500800006 | - |
dc.identifier.bibliographicCitation | CATALYSIS TODAY, v.360, pp.305 - 316 | - |
dc.relation.isPartOf | CATALYSIS TODAY | - |
dc.citation.title | CATALYSIS TODAY | - |
dc.citation.volume | 360 | - |
dc.citation.startPage | 305 | - |
dc.citation.endPage | 316 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Applied | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordPlus | V2O5-WO3/TIO2 CATALYSTS | - |
dc.subject.keywordPlus | RAMAN-SPECTROSCOPY | - |
dc.subject.keywordPlus | N2O FORMATION | - |
dc.subject.keywordPlus | XPS SPECTRA | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | SCR | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | ADSORPTION | - |
dc.subject.keywordPlus | FE2O3 | - |
dc.subject.keywordAuthor | Fe2O3-promoted V2O5/TiO2-based catalyst | - |
dc.subject.keywordAuthor | High Fe2O3-to-V2O5 ratio | - |
dc.subject.keywordAuthor | NH3-SCR | - |
dc.subject.keywordAuthor | N2O formation | - |
dc.subject.keywordAuthor | N2O reduction with NH3 | - |
dc.subject.keywordAuthor | Strongly adsorbed NH3 | - |
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