Hoyermann, Karlheinz

[["dc.bibliographiccitation.firstpage","13608"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Molecules"],["dc.bibliographiccitation.lastpage","13622"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Seidel, Lars"],["dc.contributor.author","Hoyermann, Karlheinz"],["dc.contributor.author","Mauss, Fabian"],["dc.contributor.author","Nothdurft, Joerg"],["dc.contributor.author","Zeuch, Thomas"],["dc.date.accessioned","2018-11-07T09:17:45Z"],["dc.date.available","2018-11-07T09:17:45Z"],["dc.date.issued","2013"],["dc.description.abstract","Photochemically driven reactions involving unsaturated radicals produce a thick global layer of organic haze on Titan, Saturn's largest moon. The allyl radical self-reaction is an example for this type of chemistry and was examined at room temperature from an experimental and kinetic modelling perspective. The experiments were performed in a static reactor with a volume of 5 L under wall free conditions. The allyl radicals were produced from laser flash photolysis of three different precursors allyl bromide (C3H5Br), allyl chloride (C3H5Cl), and 1,5-hexadiene (CH2CH(CH2)(2)CHCH2) at 193 nm. Stable products were identified by their characteristic vibrational modes and quantified using FTIR spectroscopy. In addition to the (re-) combination pathway C3H5+C3H5 -> C6H10 we found at low pressures around 1 mbar the highest final product yields for allene and propene for the precursor C3H5Br. A kinetic analysis indicates that the end product formation is influenced by specific reaction kinetics of photochemically activated allyl radicals. Above 10 mbar the (re-) combination pathway becomes dominant. These findings exemplify the specificities of reaction kinetics involving chemically activated species, which for certain conditions cannot be simply deduced from combustion kinetics or atmospheric chemistry on Earth."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2013"],["dc.identifier.doi","10.3390/molecules181113608"],["dc.identifier.fs","600601"],["dc.identifier.isi","000330311500033"],["dc.identifier.pmid","24192913"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9485"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28241"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mdpi Ag"],["dc.relation.issn","1420-3049"],["dc.rights.access","openAccess"],["dc.title","Pressure Dependent Product Formation in the Photochemically Initiated Allyl plus Allyl Reaction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3824"],["dc.bibliographiccitation.issue","14"],["dc.bibliographiccitation.journal","Physical Chemistry Chemical Physics"],["dc.bibliographiccitation.lastpage","3835"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Hoyermann, Karlheinz"],["dc.contributor.author","Mauss, Fabian"],["dc.contributor.author","Zeuch, Thomas"],["dc.date.accessioned","2018-11-07T10:47:12Z"],["dc.date.available","2018-11-07T10:47:12Z"],["dc.date.issued","2004"],["dc.description.abstract","On the basis of existing detailed kinetic schemes a general and consistent mechanism of the oxidation of hydrocarbons and the formation of higher hydrocarbons was compiled for computational studies covering the characteristic properties of a wide range of combustion processes. Computed ignition delay times of hydrocarbon -oxygen mixtures (CH4-, C2H6-, C3H8-, n-C4H10-, CH4 + C2H6-, C2H4, C3H6-O-2) match the experimental values. The calculated absolute flame velocities of laminar premixed flames (CH4-, C2H6-, C3H8-, n-C4H10-, C2H4-, C3H6-, and C2H2-air) and the dependence on mixture strength agree with the latest experimental investigations reported in the literature. With the same model concentration profiles for major and intermediate species in fuel-rich, non-sooting, premixed C2H2-, C3H6- air flames and a mixed C2H2/C3H6 (1:1)-air flame at 50 mbar are predicted in good agreement with experimental data. An analysis of reaction pathways shows for all three flames that benzene formation can be described by propargyl combination."],["dc.identifier.doi","10.1039/b404632c"],["dc.identifier.isi","000223472600006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/47916"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc Chemistry"],["dc.relation.issn","1463-9076"],["dc.title","A detailed chemical reaction mechanism for the oxidation of hydrocarbons and its application to the analysis of benzene formation in fuel-rich premixed laminar acetylene and propene flames"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]