第一次大气测量和HFO-1336mzz的排放估计)
Dominique Rust1,2, Martin K Vollmer1, Stephan Henne1
1Laboratory for Air Pollution/Environmental Technology, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
Environmental science & technology
|July 28, 2023
概括
大气测量显示,HFO-1336mzz (Z) 的存在越来越多,HFO-1336mzz (Z) 是一种新的不和环氧碳. 在瑞士和荷兰估计了排放量,强调需要监测这些替代破坏臭氧层物质的替代品.
科学领域:
- 大气化学和环境科学 大气化学和环境科学
背景情况:
- 短寿命的不和环氧碳被推销为对长寿命温室气体和破坏臭氧层的物质的环保替代品.
- 追踪这些新化合物在大气中的存在对于了解它们对环境的影响至关重要.
研究的目的:
- 介绍一下HFO-1336mzz ((Z) ((Z) -1,1,1,4,4,4-hexafluoro-2-butene) 的第一个大气测量结果.
- 为了估计瑞士和荷兰的HFO-1336mzz (Z) 排放量.
主要方法:
- 在瑞士和荷兰的多个地点进行的大气测量.
- 对HFO-1336mzz(Z) 分数和时间趋势的分析.
- 基于大气测量和建模的排放估计.
主要成果:
- 自2018年以来,在瑞士和荷兰,超过90%的测量中检测到HFO-1336mzz(Z).
- 在污染事件中,分子分数达到大约每万亿分之10 (ppt).
- 瑞士的估计排放量为2-7Mg/年 (2019-2021年),荷兰的估计排放量为30Mg/年 (2022年).
结论:
- 越来越多的HFO-1336mzz (Z) 在大气中的存在表明,它越来越多地被用作替代环氧碳.
- 排放模式与人口密度不完全一致,这表明特定的工业或应用驱动的来源.
- 由于潜在的大气降解产物和HFO生产中涉及的气候活性物质,如CFC-113a,因此持续监测至关重要.
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