Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Civil and Environmental Engineering | en_US |
| dc.contributor.advisor | Lee, Shuncheng (CEE) | en_US |
| dc.creator | Li, Wenqi | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/10866 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Formation of OVOCs and alkyl nitrates from the dark reaction of isoprene with nitrates (NO₃) | en_US |
| dcterms.abstract | Alkyl 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.extent | viii, 51 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2020 | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.LCSH | Atmospheric chemistry | en_US |
| dcterms.LCSH | Organic compounds | en_US |
| dcterms.LCSH | Air -- Pollution | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 5364.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 777.92 kB | Adobe PDF | View/Open |
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