DOI: 10.1016/j.atmosenv.2018.01.001
Scopus记录号: 2-s2.0-85040076313
论文题名: Exploratory study of atmospheric methane enhancements derived from natural gas use in the Houston urban area
作者: Sanchez N ; P ; , Zheng C ; , Ye W ; , Czader B ; , Cohan D ; S ; , Tittel F ; K ; , Griffin R ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 176 起始页码: 261
结束页码: 273
语种: 英语
英文关键词: Methane emissions
; Mobile-mode field monitoring
; Natural gas
; Natural gas distribution systems
; Thermogenic methane emission sources
Scopus关键词: Agriculture
; Atmospheric chemistry
; Density of gases
; Gas emissions
; Gases
; Greenhouse gases
; Methane
; Natural gas
; Greater Houston area
; Interband cascade laser
; Methane emissions
; Mode fields
; Natural gas distribution system
; Source discrimination
; Thermogenic methane
; Volumetric fractions
; Natural gas fields
; ethane
; methane
; natural gas
; petroleum
; anthropogenic source
; atmospheric gas
; carbon emission
; distribution system
; greenhouse gas
; infrastructure
; leakage
; methane
; monitoring system
; natural gas
; petroleum
; urban area
; air monitoring
; air sampling
; Article
; atmosphere
; atmospheric dispersion
; carbon footprint
; concentration (parameters)
; controlled study
; covariance
; data collection method
; discriminant analysis
; environmental monitoring
; exploratory research
; greenhouse gas
; heating
; industrial area
; priority journal
; urban area
; volumetry
; Houston
; Texas
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The extensive use of natural gas (NG) in urban areas for heating and cooking and as a vehicular fuel is associated with potentially significant emissions of methane (CH4) to the atmosphere. Methane, a potent greenhouse gas that influences the chemistry of the atmosphere, can be emitted from different sources including leakage from NG infrastructure, transportation activities, end-use uncombusted NG, landfills and livestock. Although significant CH4 leakage associated with aging local NG distribution systems in the U.S. has been reported, further investigation is required to study the role of this infrastructure component and other NG-related sources in atmospheric CH4 enhancements in urban centers. In this study, neighborhood-scale mobile-based monitoring of potential CH4 emissions associated with NG in the Greater Houston area (GHA) is reported. A novel dual-gas 3.337 μm interband cascade laser-based sensor system was developed and mobile-mode deployed for simultaneous CH4 and ethane (C2H6) monitoring during a period of over 14 days, corresponding to ∼ 90 h of effective data collection during summer 2016. The sampling campaign covered ∼250 exclusive road miles and was primarily concentrated on eight residential zones with distinct infrastructure age and NG usage levels. A moderate number of elevated CH4 concentration events (37 episodes) with mixing ratios not exceeding 3.60 ppmv and associated with atmospheric background enhancements below 1.21 ppmv were observed during the field campaign. Source discrimination analyses based on the covariance between CH4 and C2H6 levels indicated the predominance of thermogenic sources (e.g., NG) in the elevated CH4 concentration episodes. The volumetric fraction of C2H6 in the sources associated with the thermogenic CH4 spikes varied between 2.7 and 5.9%, concurring with the C2H6 content in NG distributed in the GHA. Isolated CH4 peak events with significantly higher C2H6 enhancements (∼11%) were observed at industrial areas and locations with high density of petroleum and gas pipelines in the GHA, indicating potential variability in Houston's thermogenic CH4 sources. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83026
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Rice University, 6100 Main St, Houston, TX, United States; Department of Electrical and Computer Engineering, Rice University, 6100 Main St, Houston, TX, United States; State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, China; College of Engineering, Shantou University, 243 Daxue Road, Shantou, China
Recommended Citation:
Sanchez N,P,, Zheng C,et al. Exploratory study of atmospheric methane enhancements derived from natural gas use in the Houston urban area[J]. Atmospheric Environment,2018-01-01,176