甲泄漏检测和修复 (LDAR) 计划在实践中的有效性
Shona E Wilde1, David R Tyner1, Matthew R Johnson1
1Energy and Emissions Research Laboratory, Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
概括
使用光学气体成像的定期泄漏检测和修复 (LDAR) 调查只捕获了一半的甲排放. 独立的空中调查显示,排放量显著增加,突出了对补充测量方法的需求.
科学领域:
- 环境科学 环境科学
- 能源政策 能源政策
- 大气化学 大气化学
背景情况:
- 石油和天然气行业的甲排放是一个重大问题.
- 泄漏检测和修复 (LDAR) 调查是法规规定的.
- 评估LDAR调查的实际有效性一直是个挑战.
研究的目的:
- 评估基于光学气体成像 (OGI) 的LDAR调查的有效性.
- 将OGI-LDAR数据与独立的空中调查数据进行比较.
- 了解目前的LDAR实践在捕获总甲排放中的局限性.
主要方法:
- 分析了来自不列颠哥伦比亚省监管的LDAR调查的三年报告数据.
- 与独立来源解决的空中调查在网站子集的比较.
- 从空中数据中排除潜在的燃烧相关和故意的通风源,以便进行谨慎的比较.
主要成果:
- 每年3次的OGI-LDAR调查将符合规定的地点的检测排放量减少了一半.
- 与LDAR相比,空中调查总体检测到的甲排放量是LDAR的12倍.
- 空中调查发现,即使不包括非OGI目标来源,排放量也增加了4倍.
结论:
- 监管的OGI-LDAR调查只捕获了甲总排放量的很小一部分.
- 目前的LDAR实践可能会高估缓解影响.
- 补充测量方法和独立验证 (例如,OGMP 2.0) 对于准确的排放评估至关重要.
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