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dc.contributorDepartment of Civil and Environmental Engineeringen_US
dc.contributor.advisorLee, Shuncheng (CEE)en_US
dc.creatorLi, Wenqi-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/10866-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic Universityen_US
dc.rightsAll rights reserveden_US
dc.titleFormation of OVOCs and alkyl nitrates from the dark reaction of isoprene with nitrates (NO₃)en_US
dcterms.abstractAlkyl nitrates (RONO₂), important reservoirs of atmospheric nitrogen, have been concerned by many scholars after proved to have effects on aerosols and ozone in the atmosphere. Isoprene (2-methyl-1,3-butadiene), the most naturally emitted non-methane volatile organic compound (NMVOC), can react with NO₃ and produce alkyl nitrates. Because isoprene has a large presence in the atmosphere, alkyl nitrate generated from this approach cannot be ignored and is worth studying. Alkyl nitrates and gas-phase products formation from the reaction of isoprene with NO₂ and O₃ is investigated in the 6 m³ Teflon reaction chamber at The Hong Kong Polytechnic University. Experiment are carried out in dark and dry (30-40% relative humidity) conditions. NO₂ and O₃ is used as a source of NO₃ radicals. A detailed literature review of most kind of widely used measuring instruments is presented in this paper. After comparing applicability and limitation, proton-transfer-reaction time-of-flight mass spectrometer (PTR-TOF-MS) is appropriate for real-time detect alkyl nitrates. So, PTR-TOF-MS and chemical ionization mass spectrometry (CIMS) are used to detected alkyl nitrates and oxygenated volatile organic compounds (OVOCs) in this study. And the result shows that nitrogen oxides have a significant effect on the alkyl nitrates.en_US
dcterms.extentviii, 51 pages : color illustrationsen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2020en_US
dcterms.educationalLevelM.Sc.en_US
dcterms.educationalLevelAll Masteren_US
dcterms.LCSHAtmospheric chemistryen_US
dcterms.LCSHOrganic compoundsen_US
dcterms.LCSHAir -- Pollutionen_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.accessRightsrestricted accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/10866