通过对挥发性有机化合物的前体采取选择性缓解措施来控制臭氧
Sheng-Po Chen1, Wen-Tzu Liu2, Fang-Yi Cheng3
1Center for Environmental Monitoring and Technology, National Central University, Taoyuan, Taiwan.
The Science of the total environment
|October 21, 2023
概括
针对高反应性挥发性有机化合物 (VOC) 显著减少臭氧的形成. 这种选择性前体减缓 (SPM) 方法将目标来源和位最小化,以最大限度地减少臭氧,提供一个具有成本效益的战略.
科学领域:
- 大气化学 大气化学
- 空气质量建模空气质量模型
- 环境科学 环境科学
背景情况:
- 传统的挥发性有机化合物 (VOC) 减排经常忽视物种的反应性,导致低效的臭氧减排.
- 工业排放是挥发性有机物的主要来源,有助于地面层臭氧 (O3) 的形成.
- 臭氧减排策略通常侧重于总VOC位,而不是特定的高反应性化合物.
研究的目的:
- 开发和评估一种选择性前体减缓 (SPM) 战略,以最大限度地减少臭氧 (O3).
- 将最大增量反应率 (MIR) 和物种特征纳入排放清单,以有针对性的减少挥发性有机物.
- 尽量减少目标工业来源的数量和减少挥发性有机化合物的量,同时实现显著的O3减少.
主要方法:
- 利用台湾的工业排放库存,整合最大增量反应率 (MIR) 和物种特征.
- 雇佣社区多尺度空气质量 (CMAQ) 建模,以模拟在VOC限制条件下的O3减少 (ΔO3).
- 对比了各种缓解场景,包括针对高臭氧形成潜力 (OFP) 的工业和化学品,与整体缓解 (OM).
主要成果:
- 针对拥有最高OFP (OFPind) 的前十个工业类别,可以实现高达19%的最大1小时 ΔO3.
- 与OFPind相同的VOC位的整体缓解 (OM) 产生了类似的结果,但需要近三倍的资源来管理.
- 在顶级OFP行业 (OFPsp) 中专注于前十大OFP化学品有效地缓解了主要的臭氧热点,尽管覆盖面积减少了.
结论:
- 选择性前体缓解 (SPM) 方法通过向活性VOC来最大限度地减少臭氧的效果非常高.
- 与总体VOC位减少相比,SPM提供了一个更有效和更具成本效益的策略.
- 在全球各个地区,SPM方法广泛适用于优化臭氧减排策略和最大限度地降低社会成本.
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