在美国天然气液化码头对温室气体排放的多尺度测量
Yuanrui Zhu1,2, Gregory Ross3, Olga Khaliukova1,4
1Energy Emissions Modeling and Data Lab (EEMDL), The University of Texas at Austin, Austin Texas 78712, United States.
概括
减少液化天然气 (LNG) 对气候的影响需要解决甲排放问题. 美国液化天然气码头的测量显示,二氧化碳而不是甲主导温室气体排放,验证了官方的强度估计.
科学领域:
- 环境科学 环境科学
- 气候变化缓解缓解 气候变化缓解
- 能源部门排放排放量
背景情况:
- 来自液化天然气 (LNG) 供应链的甲排放对气候变化作出了重大贡献.
- 官方的温室气体 (GHG) 库存往往低估了排放量,强调了对测量数据的需求.
- 美国液化天然气液化终端的公开,详细的排放测量很少.
研究的目的:
- 在两个美国液化天然气码头进行甲和二氧化碳排放的详细,多尺度测量.
- 评估液化天然气终端现有的排放强度估计的准确性.
- 为减少液化天然气对气候影响的战略提供信息.
主要方法:
- 在两个美国液化天然气液化终端执行了为期16个月的测量活动.
- 使用多尺度方法定期测量甲和二氧化碳排放.
- 计算的甲排放强度正常化为液化天然气生产和总温室气体排放强度.
主要成果:
- 甲排放强度在LNG生产的0.007%至0.045%之间.
- 二氧化碳排放占总温室气体排放量的95%以上,考虑到甲的100年全球变暖潜力.
- 测量温室气体排放强度 (0.24-0.27公斤CO2e/公斤CH4) 与报告中的估计值非常一致.
结论:
- 与其他天然气部门不同,液化天然气终端显示了测量和报告的温室气体排放强度之间的密切一致.
- 美国温室气体报告计划为液化天然气终端提供了相当准确的总温室气体排放强度估计.
- 专注于二氧化碳排放以及甲排放对于准确评估液化天然气对气候的影响至关重要.
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