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dc.contributor.author
Schumacher, M.
dc.contributor.author
Neubert, Rolf E.M.
dc.contributor.author
Meijer, Harro A.J.
dc.contributor.author
Jansen, H.G.
dc.contributor.author
Brand, Willi A.
dc.contributor.author
Geilmann, Heike
dc.contributor.author
Werner, R.A.
dc.date.accessioned
2019-09-10T10:59:13Z
dc.date.available
2017-06-08T21:10:22Z
dc.date.available
2019-09-10T10:59:13Z
dc.date.issued
2008
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acpd-8-18993-2008
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/13862
dc.identifier.doi
10.3929/ethz-b-000013862
dc.description.abstract
For a comprehensive understanding of the global carbon cycle precise knowledge ofall processes is necessary. Stable isotope (13C and18O) abundances provide infor-mation for the qualification and the quantification of the diverse source and sink pro-cesses. This study focuses on theδ18O signature of CO2from combustion processes, which are widely present both naturally (wild fires), and human induced (fossil fuelcombustion, biomass burning) in the carbon cycle. All these combustion processesuse atmospheric oxygen, of which the isotopic signature is assumed to be constantwith time throughout the whole atmosphere. The combustion is generally presumedto take place at high temperatures, thus minimizing isotopic fractionation. Therefore it is generally supposed that the18O signature of the produced CO2is equal to that ofthe atmospheric oxygen. This study, however, reveals that the situation is much morecomplicated and that important fractionation effects do occur. From laboratory studiesfractionation effects in the order of about 26‰ became obvious, a clear differentiation ofabout 7‰ was also found in car exhausts which were sampled directly under ambient atmospheric conditions.We investigated a wide range of materials (both different raw materials and similarmaterials with different inherent18O signature), sample geometries (e.g. texture andsurface-volume ratios) and combustion circumstances. We found that the main factorinfluencing the specific isotopic signatures of the combustion-derived CO2and of the concomitantly released oxygen-containing side products, is the case-specific rate ofcombustion. This points firmly into the direction of (diffusive) transport of oxygen to thereaction zone as the cause of the isotope fractionation. The original18O signature ofthe material appeared to have little or no influence.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus Publications
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Oxygen isotopic signature of CO2 from combustion processes
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2008-11-05
ethz.journal.title
Atmospheric Chemistry and Physics Discussions
ethz.journal.volume
8
en_US
ethz.journal.issue
6
en_US
ethz.journal.abbreviated
Atmos. chem. phys. discuss.
ethz.pages.start
18993
en_US
ethz.pages.end
19034
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.nebis
010152758
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03648 - Buchmann, Nina / Buchmann, Nina
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03648 - Buchmann, Nina / Buchmann, Nina
ethz.date.deposited
2017-06-08T21:10:34Z
ethz.source
ECIT
ethz.identifier.importid
imp59364c32dfa1789262
ethz.ecitpid
pub:25360
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-26T04:14:54Z
ethz.rosetta.lastUpdated
2020-02-15T21:34:33Z
ethz.rosetta.versionExported
true
ethz.COinS
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