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Promoting effects of water on the NH3-SCR reaction over Cu-SAPO-34 catalysts: transient and permanent influences on Cu species.

Cu-SAPO-34 catalysts with varied Cu loadings were synthesized through ion exchange to study the influence of water on the NH3-SCR reaction. The catalytic activities were evaluated by selective catalytic reduction of NO under a reactant feed in the presence/absence of water. Transient experiments wer... Full description

Journal Title: Dalton transactions (Cambridge England : 2003), January 21, 2020, Vol.49(3), pp.764-773
Main Author: Wan, Yuyi
Other Authors: Yang, Guangpeng , Xiang, Jinyao , Shen, Xiaoqiang , Yang, Dafei , Chen, Yanrong , Rac, Vladislav , Rakic, Vesna , Du, Xuesen
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1477-9234 ; DOI: 10.1039/c9dt03848e
Link: http://search.proquest.com/docview/2328347899/?pq-origsite=primo
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title: Promoting effects of water on the NH3-SCR reaction over Cu-SAPO-34 catalysts: transient and permanent influences on Cu species.
format: Article
creator:
  • Wan, Yuyi
  • Yang, Guangpeng
  • Xiang, Jinyao
  • Shen, Xiaoqiang
  • Yang, Dafei
  • Chen, Yanrong
  • Rac, Vladislav
  • Rakic, Vesna
  • Du, Xuesen
subjects:
  • Oxidation
  • Chemical Synthesis
  • Selective Catalytic Reduction
  • Influence
  • Ammonia
  • Ion Exchanging
  • Catalysts
ispartof: Dalton transactions (Cambridge, England : 2003), January 21, 2020, Vol.49(3), pp.764-773
description: Cu-SAPO-34 catalysts with varied Cu loadings were synthesized through ion exchange to study the influence of water on the NH3-SCR reaction. The catalytic activities were evaluated by selective catalytic reduction of NO under a reactant feed in the presence/absence of water. Transient experiments were designed to study the response of NO conversion to the presence of water. H2-TPR and DFT calculations were performed to study the reducibility of Cu species. NH3-TPD and XPS were conducted to reveal the migration of Cu species. The results show that water could remarkably improve NO reduction activities and the promoting effect is more significant on the catalyst with low Cu loading. Both transient and permanent influences were found in this promoting phenomenon. For the transient influence, water has been proved to accelerate the re-oxidation half-cycle. Moreover, water can enhance the promoting effect of the SCR feed on the migration of Cu species. These unanchored Cu ions migrate to defect...
language: eng
source:
identifier: E-ISSN: 1477-9234 ; DOI: 10.1039/c9dt03848e
fulltext: fulltext
issn:
  • 14779234
  • 1477-9234
url: Link


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titlePromoting effects of water on the NH3-SCR reaction over Cu-SAPO-34 catalysts: transient and permanent influences on Cu species.
creatorWan, Yuyi ; Yang, Guangpeng ; Xiang, Jinyao ; Shen, Xiaoqiang ; Yang, Dafei ; Chen, Yanrong ; Rac, Vladislav ; Rakic, Vesna ; Du, Xuesen
contributorWan, Yuyi (correspondence author) ; Wan, Yuyi (record owner)
ispartofDalton transactions (Cambridge, England : 2003), January 21, 2020, Vol.49(3), pp.764-773
identifierE-ISSN: 1477-9234 ; DOI: 10.1039/c9dt03848e
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subjectOxidation ; Chemical Synthesis ; Selective Catalytic Reduction ; Influence ; Ammonia ; Ion Exchanging ; Catalysts;
descriptionCu-SAPO-34 catalysts with varied Cu loadings were synthesized through ion exchange to study the influence of water on the NH3-SCR reaction. The catalytic activities were evaluated by selective catalytic reduction of NO under a reactant feed in the presence/absence of water. Transient experiments were designed to study the response of NO conversion to the presence of water. H2-TPR and DFT calculations were performed to study the reducibility of Cu species. NH3-TPD and XPS were conducted to reveal the migration of Cu species. The results show that water could remarkably improve NO reduction activities and the promoting effect is more significant on the catalyst with low Cu loading. Both transient and permanent influences were found in this promoting phenomenon. For the transient influence, water has been proved to accelerate the re-oxidation half-cycle. Moreover, water can enhance the promoting effect of the SCR feed on the migration of Cu species. These unanchored Cu ions migrate to defect...
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