用于测量1gCH4的甲排放的方法的不确定性量化h-1
Stuart N Riddick1, Mercy Mbua1, John C Riddick2
1Energy Institute, Colorado State University, Fort Collins, CO 80524, USA.
Sensors (Basel, Switzerland)
|November 25, 2023
概括
精确测量孤儿石油和天然气井的甲 (CH4) 排放量至关重要. 动态室,Hi-Flow采样器和高斯羽流方法都成功量化了受控的甲排放,符合严格的美国联邦孤儿井计划和美国碳登记册标准.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 地质科学 地质科学
背景情况:
- 废弃的石油和天然气井是甲 (CH4) 排放的重要来源.
- 准确量化CH4排放对于监管合规和气候变化减缓工作至关重要.
- 现有的测量方法必须符合美国联邦孤儿井计划 (FOWP) 和美国碳登记处 (ACR) 等计划所设定的严格准确性要求.
研究的目的:
- 评估常用的CH4排放量化方法的准确性和不确定性.
- 确定这些方法是否符合FOWP和ACR测量低水平CH4排放 (1g CH4 h−1 ±20%) 的要求.
- 为了在受控条件下比较动态室,Hi-Flow采样器和高斯羽毛接近的性能.
主要方法:
- 用1gCH4h-1的受控排放源来测试四种量化方法.
- 方法包括两种类型的动态室 (一种标准,一种移动),一个Hi-Flow (HF) 采样器,以及基于高斯羽毛 (GP) 的方法.
- 进行了三次实验,以计算每个方法的平均准确性和不确定性边界.
主要成果:
- 所有测试方法 (动态室,移动室,GP,HF采样器) 准确量化控制的CH4排放在目标1gCH4h-1.1的±3%以内.
- 单个动态室测量实现了1gCH4h-1的±6%的量化,无论室内设计的变化.
- 该研究证实,这些方法符合FOWP和ACR测量最低排放的协议.
结论:
- 动态室,Hi-Flow采样器和高斯羽流方法适用于量化废弃井的低水平CH4排放量.
- 一个可折叠的移动室为测量偏远地区的排放提供了一个实用的解决方案.
- 这些发现证实了这些方法在监管和环境监测方面的可靠性.
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