Mapping urban pipeline leaks: Methane leaks across Boston
Mapping urban pipeline leaks: Methane leaks across Boston
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DOI：
10.1016/j.envpol.2012.11.003
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发表时间：
2013-02-01
影响因子：
8.9
通讯作者：
Jackson, Robert B.
中科院分区：
文献类型：
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作者：
Phillips, Nathan G.;Ackley, Robert;Jackson, Robert B.
天然气是美国人为排放甲烷(CH4)的最大来源。为了评估一座大城市的管道排放，我们使用空腔响应式移动甲烷分析仪绘制了波士顿所有785英里道路上的甲烷泄漏图。我们发现了3356次甲烷泄漏，其浓度超过了全球背景水平的15倍。另外，我们测量了这些泄漏的子集的增量(CH4)-C-13同位素特征。三角洲(CH4)-C-13特征(平均值=-42.8‰+/-13‰；n=32)强烈表明大多数泄漏来自化石燃料来源，而不是生物来源；全市采集的天然气的平均Delta(CH4)-C-13值为-36.8‰(+/-0.7‰)。S.E.，n=10)，而从垃圾填埋场、湿地和下水道系统收集的CH4具有类似于万分之20的增量(CH4)-C-13特征(Mu=-57.8‰，+/-1.6‰S.E.，n=8)。修复泄漏的天然气分配系统将减少温室气体排放，提高消费者的健康和安全，并节省资金。(C)2012爱思唯尔有限公司。保留所有权利。
Natural gas is the largest source of anthropogenic emissions of methane (CH4) in the United States. To assess pipeline emissions across a major city, we mapped CH4 leaks across all 785 road miles in the city of Boston using a cavity-ring-down mobile CH4 analyzer. We identified 3356 CH4 leaks with concentrations exceeding up to 15 times the global background level. Separately, we measured delta(CH4)-C-13 isotopic signatures from a subset of these leaks. The delta(CH4)-C-13 signatures (mean = -42.8 parts per thousand +/- 13 parts per thousand s.e.; n = 32) strongly indicate a fossil fuel source rather than a biogenic source for most of the leaks; natural gas sampled across the city had average delta(CH4)-C-13 values of -36.8 parts per thousand (+/- 0.7 parts per thousand. s.e., n = 10), whereas CH4 collected from landfill sites, wetlands, and sewer systems had delta(CH4)-C-13 signatures similar to 20 parts per thousand lighter (mu = -57.8 parts per thousand,+/- 1.6 parts per thousand s.e., n = 8). Repairing leaky natural gas distribution systems will reduce greenhouse gas emissions, increase consumer health and safety, and save money. (C) 2012 Elsevier Ltd. All rights reserved.