颗粒炉的排放的表征和暗氧化
Kalliopi Florou1, John K Kodros1, Marco Paglione1,2
1Institute of Chemical Engineering Sciences, ICE-HT Patras 26504 Greece.
Environmental science: atmospheres
|November 28, 2023
概括
颗粒炉的排放会对空气质量产生重大影响,即使在黑暗中也会形成二级有机气溶 (SOA). 相对湿度会影响SOA的形成和氧化,而较高的湿度会促进更多的氧化气溶.
科学领域:
- 大气化学 大气化学
- 环境科学 环境科学
- 燃烧科学 燃烧科学
背景情况:
- 住宅颗粒炉使用的全球增长引发了空气质量问题.
- 对于颗粒排放衰老的理解有限,特别是在夜间和不同湿度时.
研究的目的:
- 从颗粒炉排放的新鲜和老化有机气溶 (OA) 的特征.
- 研究夜间衰老路径和相对湿度 (RH) 的作用.
主要方法:
- 环境模拟室实验.环境模拟室实验.
- 分析颗粒物 (PM1) 组成 (OA,黑碳).
- 在不同的RH水平下使用二氧化 (NO2) 和臭氧 (O3) 的氧化实验.
主要成果:
- 新鲜颗粒的排放主要是OA (93%),O:C比率高于木材.
- 通过NO3基的暗老化形成了二次有机气溶 (SOA).
- 低RH产生高达30%的SOA质量增加;高RH (60-80%) 导致更多的氧化气溶 (11-18%的O:C增加) 与轻微的质量增加 (1-10%).
结论:
- 颗粒排放OA在低光条件下化学演变,形成SOA.
- 不同质的水性反应对于高RH的气溶氧化很重要.
- 颗粒炉的排放对空气质量构成重大,未经研究的威胁,特别是在冬季.
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