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In-situ studies of ...
In-situ studies of oxidation/reduction of copper in Cu-CHA SCR catalysts: Comparison of fresh and SO2-poisoned catalysts
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- Bergman, Susanna L. (författare)
- Yale NUS College,Yale NUS Coll, Sci Div, Singapore 138527, Singapore.
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- Dahlin, Sandra (författare)
- KTH,Processteknologi,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Mesilov, Vitaly V. (författare)
- Yale NUS College,Yale NUS Coll, Sci Div, Singapore 138527, Singapore.
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- Xiao, Yang (författare)
- Yale NUS College,Yale NUS Coll, Sci Div, Singapore 138527, Singapore.
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- Englund, Johanna, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Competence Ctr Catalysis, S-41296 Gothenburg, Sweden.
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- Xi, Shibo (författare)
- ASTAR, Singapore Synchrotron Light Source, ICES, Singapore 117603, Singapore.
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- Tang, Chunhua (författare)
- Universiti Kebangsaan Singapura (NUS),National University of Singapore (NUS),Natl Univ Singapore, Mat Sci & Engn, Singapore 117575, Singapore.
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- Skoglundh, Magnus, 1965 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Competence Ctr Catalysis, S-41296 Gothenburg, Sweden.
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- Pettersson, Lars J. (författare)
- KTH,Kemiteknik,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Bernasek, Steven L. (författare)
- Yale NUS College,Yale NUS Coll, Sci Div, Singapore 138527, Singapore.
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Yale NUS College Yale NUS Coll, Sci Div, Singapore 138527, Singapore (creator_code:org_t)
- Elsevier BV, 2020
- 2020
- Engelska.
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Ingår i: Applied Catalysis B: Environmental. - : Elsevier BV. - 0926-3373 .- 1873-3883. ; 269
- Relaterad länk:
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https://doi.org/10.1...
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https://research.cha...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- SO2-poisoning results in deactivation of Cu-CHA SCR under standard SCR conditions; however regeneration at 700 °C completely restores the SCR performance. To understand the nature of these effects, Cu-species in the fresh and poisoned catalysts were characterized by in-situ temperature-dependent time-resolved Cu K-edge X-ray absorption spectroscopy using the multivariate curve resolution alternating least squares (MCR-ALS) approach and continuous Cauchy wavelet transforms. The extracted chemically-meaningful reference spectra of Cu-species were analyzed by DFT-assisted XANES calculations. Cu-bisulfates were found as the most energetically favorable poisoned Cu-species. The response of Cu-species to a reducing environment differs in the fresh and SO2-poisoned catalysts. Differences in reducibility are related to the formation of quasi-linear Cu-complexes in the SO2-poisoned catalyst formed during heating in H2/He. Heating in H2/He leads to partial desulfurization of the poisoned catalyst. Cooling in H2/He after heating results in more facile formation of Cu-metal clusters in fresh catalyst than in SO2-poisoned.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- NH -SCR 3
- regeneration
- SO /sulfur poisoning 2
- In-situ XANES
- Cu-SSZ-13
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- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Bergman, Susanna ...
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Dahlin, Sandra
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Mesilov, Vitaly ...
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Xiao, Yang
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Englund, Johanna ...
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Xi, Shibo
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Tang, Chunhua
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Skoglundh, Magnu ...
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Pettersson, Lars ...
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Bernasek, Steven ...
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Oorganisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Atom och molekyl ...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Annan kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
- Artiklar i publikationen
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Applied Catalysi ...
- Av lärosätet
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Chalmers tekniska högskola
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Kungliga Tekniska Högskolan