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DC FieldValueLanguage
dc.contributorFaculty of Construction and Environmenten_US
dc.contributor.advisorLee, Shuncheng (CEE)-
dc.creatorDai, Jiannan-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/9536-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleFormation of oxygenated volatile organic compounds from the dark ozonolysis of isopreneen_US
dcterms.abstractSecondary organic aerosol (SOA) has an important impact on air quality, human health and climate change. In recent years, the emerging smog chamber experiments provided plenty of reliable reference and parameters for studying on the SOA formation mechanism. In this work, a new smog chamber was set up at the Hong Kong Polytechnic University (PolyU), and a series characterizations including measurement of gaseous and particular species wall loss rate and evaluation of other mechanism were underwent. At the same time, a series of experiments were carried out to investigate the major products of the dark ozonolysis of isoprene, and the factors on the yields and reaction rate of this process. This study found that oxygenated volatile organic compounds(OVOCs) containing one to four carbon atoms are the main gaseous phase products, which are the important factors for the formation of SOA. Furthermore, select NO₂ concentration and the ratio of isoprene to O₃ as the controlled variable to evaluate their impacts on the formation of OVOCs. The experimental results state that NO₂ has an inhibitory effect on the generation of OVOCs. The higher NO₂ concentration is, the lower OVOCs yields are. In addition, the ratio of isoprene to O₃ affects the reaction rate of isoprene. As the concentration ratio of O₃ goes up, the reaction rate of isoprene increases.en_US
dcterms.extentvi, 62 pages : color illustrationsen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2017en_US
dcterms.educationalLevelM.Sc.en_US
dcterms.educationalLevelAll Masteren_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.LCSHAerosolsen_US
dcterms.LCSHOrganic compounds -- Environmental aspectsen_US
dcterms.LCSHAtmospheric aerosolsen_US
dcterms.LCSHAtmospheric chemistryen_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/200/9536