Title page for etd-0902111-140225


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URN etd-0902111-140225
Author Jhih-Jhe Yang
Author's Email Address dream_sky21@hotmail.com
Statistics This thesis had been viewed 5373 times. Download 345 times.
Department Environmental Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Vertical Distribution and Seasonal Variation of Volatile Organic Compounds in the Ambient Atmosphere of a Petrochemical Industrial Complex
Date of Defense 2011-06-10
Page Count 212
Keyword
  • ozone formation potential.
  • principal component analysis
  • stratification phenomena
  • vertical profile sampling
  • Volatile organic compounds
  • Abstract The emission of volatile organic compounds (VOCs) and odors from petrochemical industrial complex, including China Petroleum company (CPC),Renwu and Dazher petrochemical industrial parks, causes poor air quality of northern Kaohsiung. The removal efficiencies of elevated stacks and flares might play
    important roles on ambient air quality in metro Kaohsiung. Consequently, this study
    applied a tethered balloon technology to measure the vertical profile of VOCs, and
    ascertained their three dimensional dispersion in the atmosphere.
    The vertical profile of VOCs in ambient atmosphere surrounding the
    petrochemical industrial complex was measured during the intensive sampling periods
    (September 17-18th and December 20-21st, 2009 and April 8-9th and July 7-8th, 2010).
    Moreover, this study was designed to sample and analyze VOCs emitted from
    elevated stacks and flares, and estimate their emission factors. Finally, the source
    identification and ozone formation were further determined by principal component
    analysis (PCA) and ozone formation potential (OFP).
    This study found that some regions had relatively poorer air quality than other
    regions surrounding the petrochemical industrial complex. Most sampling sites with
    poor air quality were located at the downwind region of the petrochemical industrial
    complex, particularly with the prevailing winds blown from the northwest. Moreover,
    stratification phenomena were frequently observed at most sampling sites, indicating
    that high-altitude VOCs pollution should be considered for ambient air quality.
    This study revealed that the indicators of VOCs in northern Kaohsiung were
    toluene, C2 (ethylene+acetylene+ethane), and acetone. Vertical sampling of VOCs
    showed that the species of VOCs at the ground and high altitude were different,
    suggesting that ambient air quality at high altitude might be affected by the emission
    of VOCs from elevated stacks and flares at the petrochemical industrial complex.
    Results obtained from PCA showed that the major sources of VOCs in the
    ambient atmosphere of the petrochemical industrial complex were similar to the characteristics of VOCs emitted from the petrochemical industrial complex. The
    characteristics of VOCs at high altitude had strong correlation with petrochemical
    industry, indicating that the ambient air quality of northern Kaohsiung was highly
    influenced by the emission of VOCs from high stacks and flares. In addition, major
    VOCs for O3 formation potential at northern Kaohsiung were aromatics and vinyls,
    with particular species of toluene and C2. Moreover, air pollution episodes resulting
    from high O3 concentration was usually observed in early winter.
    Flare sampling results indicated that major VOCs emitted from the ground flare
    of CPC were alkanes and vinyls. The average removal efficiency of TVOCs was
    98.2%. The average emission factor of VOCs was 0.0186 kg NMHC/kg flare gas. In
    addition, stack sampling results indicated that the emission factors of crude oil
    distillation process (P105), mixing process (P060), and rubber manufacturing process
    (P408) were 0.105, 1.11, and 61.97 g/Kl, respectively. The emission factor of P105
    was lower than AP-42, while that of P408 was higher than AP-42.
    Advisory Committee
  • Chitsan Lin - chair
  • Chung-Hsuang Hung - co-chair
  • Ya-Fen Wang - co-chair
  • Chung-Shin Yuan - advisor
  • Files
  • etd-0902111-140225.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2011-09-02

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