Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Identification of urea decomposition from an SCR perspective: A combination of experimental work and molecular modeling
KTH, Skolan för kemivetenskap (CHE), Kemiteknik.ORCID-id: 0000-0001-7135-5720
KTH, Skolan för kemivetenskap (CHE), Kemiteknik.
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.
2013 (engelsk)Inngår i: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 231, s. 220-226Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

For the automotive industry selective catalytic reduction (SCR) is the most effective way to get rid of poisonous nitrogen oxides (NOX) in the exhaust. Urea is used as precursor for the reducing agent ammonia. The stricter legislation on NOX emissions for heavy duty vehicles in Euro 6 makes it even more important to optimize the conversion of urea to ammonia.Competing with ammonia formation is the formation of two byproducts commonly observed in the SCR system, biuret and cyanuric acid. These byproducts are formed before the SCR catalyst in the trucks. In the literature different possibilities on the reaction pathway to biuret and cyanuric acid are described. The aim of this study is to understand which of these pathways that is more likely to occur.In this study, the decomposition and synthesis pathways from urea to biuret and cyanuric acid were identified by a combination of laboratory experiments and Density Functional Theory (DFT) calculations. This is the first DFT study on these reactions performed without the influence of a catalyst. Accordingly, this is a study of the reactions where they do occur, before and not over the catalyst. A new gas phase FTIR method for urea and its byproducts was developed.

sted, utgiver, år, opplag, sider
Elsevier, 2013. Vol. 231, s. 220-226
Emneord [en]
Biuret, Cyanuric acid, DFT, FTIR, SCR, Urea, Cyanuric acids, Heavy duty vehicles, Laboratory experiments, Synthesis pathways, Urea decomposition, Ammonia, Automotive industry, Byproducts, Catalysts, Metabolism, Nitrogen oxides, Thyristors, Selective catalytic reduction
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-133818DOI: 10.1016/j.cej.2013.06.124ISI: 000326767900025Scopus ID: 2-s2.0-84881262594OAI: oai:DiVA.org:kth-133818DiVA, id: diva2:665719
Forskningsfinansiär
Swedish Energy Agency
Merknad

QC 20131120

Tilgjengelig fra: 2013-11-20 Laget: 2013-11-11 Sist oppdatert: 2017-12-06bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Personposter BETA

Sebelius, Sara

Søk i DiVA

Av forfatter/redaktør
Sebelius, SaraLe, Tan ThanhPettersson, Lars J.
Av organisasjonen
I samme tidsskrift
Chemical Engineering Journal

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 249 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf