在三乙烯/百乙烯联合生产中,甲的形成特征和排放库存
Junhao Tang1,2,3, Haiyan Zhang1, Mujie Wang4
1School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China.
由于三乙烯/乙烯 (TCE/PCE) 的生产,六丁 (HCBD) 的空气度正在上升. 产品的使用,特别是制冷剂,是主要的排放来源,需要可持续的替代方案来减少HCBD污染.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 污染控制 污染控制
背景情况:
- 六丁 (HCBD) 是一种具有远程运输潜力的有毒污染物,受到国际监管.
- 尽管有相关规定,大气中的 HCBD 度仍在增加.
- 非故意的HCBD排放主要来自三乙烯 (TCE) 和乙烯 (PCE) 联合生产过程.
研究的目的:
- 调查和量化TCE/PCE联合生产工厂的HCBD排放.
- 确定主要的排放途径和HCBD释放的促成因素.
- 在全球范围内估计TCE/PCE生产导致的非故意HCBD排放的规模.
主要方法:
- 在三个TCE/PCE联合制作设施进行了现场调查.
- 对不同生产技术 (直接化与四乙转化) 的量化HCBD排放因子.
- 分析了产品使用 (制冷剂,洗剂) 和废物焚烧产生的 HCBD 排放贡献.
主要成果:
- 与四乙转化 (1.20-15.1 g/t) 相比,直接化方法的 HCBD 排放因子 (0.279 g/t) 较低.
- 产品的使用占HCBD排放的绝大多数 (≥96%),制冷剂是最大的贡献者 (~70%).
- 估计TCE/PCE联合生产的年度非故意HCBD总排放量很大,在全球范围内达到数千公斤.
结论:
- 限制使用含有TCE/PCE的制冷剂是减少HCBD排放的关键策略.
- 在制冷剂和洗剂中开发TCE/PCE的可持续替代品至关重要.
- 在TCE/PCE生产中优化工艺,偏好直接化等技术,可以降低排放因子.
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