Effect of moisture on the adsorption of ammonia

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dc.contributor University of Helsinki, Department of Chemistry en
dc.contributor University of Helsinki, Department of Chemistry en
dc.contributor University of Helsinki, Department of Chemistry en
dc.contributor.author Vaittinen, Olavi
dc.contributor.author Metsälä, Markus
dc.contributor.author Halonen, Lauri
dc.contributor.author Persijn, Stefan
dc.contributor.author Leuenberger, Daiana
dc.contributor.author Niederhauser, Bernhard
dc.date.accessioned 2019-11-25T09:27:01Z
dc.date.available 2019-11-25T09:27:01Z
dc.date.issued 2018-09
dc.identifier.citation Vaittinen , O , Metsälä , M , Halonen , L , Persijn , S , Leuenberger , D & Niederhauser , B 2018 , ' Effect of moisture on the adsorption of ammonia ' , Applied physics. B, Lasers and optics , vol. 124 , no. 9 , 189 . https://doi.org/10.1007/s00340-018-7054-2 en
dc.identifier.issn 0946-2171
dc.identifier.other PURE: 115633273
dc.identifier.other PURE UUID: ce97fe2c-57ea-4a2b-89f2-6269c6b5d22a
dc.identifier.other WOS: 000443281300005
dc.identifier.other Scopus: 85052696400
dc.identifier.other ORCID: /0000-0002-0716-7132/work/48395295
dc.identifier.uri http://hdl.handle.net/10138/307288
dc.description.abstract The effect of moisture on the adsorption of ammonia was systematically studied using different surface materials and humidity levels. The experimental water amount fractions varied between 6 and 18,000 mu molmol(-1), and the ammonia amount fraction was 400nmolmol(-1). The investigated materials included plain 316L stainless steel and stainless steel cured with Dursan, SilcoNert 2000 and halocarbon wax coatings. Furthermore, Teflon (PTFE) and polyvinylidene difluoride (PVDF) polymer surfaces were studied. Dynamically diluted ammonia, test tubes prepared with the investigated materials, a commercial ammonia analyzer based on cavity ring-down spectroscopy, and a commercial dew-point transmitter were employed. The adsorption was assessed quantitatively using continuous flow conditions and real-time monitoring of the adsorption process. The ammonia adsorption was found to increase substantially in dry conditions for all the studied materials except PVDF. The increase was largest for plain stainless steel which was the most adsorbing material. The coatings applied on stainless steel decreased the adsorption significantly in dry conditions. Polymers PVDF and PTFE were the least-adsorbing materials. In water amount fractions between 1000 and 10,000 mu mol mol(-1), the ammonia adsorption was at its lowest. The adsorption increased again above 1% humidity levels. en
dc.format.extent 8
dc.language.iso eng
dc.relation.ispartof Applied physics. B, Lasers and optics
dc.rights en
dc.subject ATMOSPHERIC AMMONIA en
dc.subject 114 Physical sciences en
dc.title Effect of moisture on the adsorption of ammonia en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1007/s00340-018-7054-2
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion
dc.contributor.pbl

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