大气和温度对绿色阳极糊的多环芳香碳化合物排放的影响 烤糊
Kamilla Arnesen1, Thor Anders Aarhaug2, Kristian Etienne Einarsrud1
1Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), 7034 Trondheim, Norway.
ACS omega
|May 30, 2023
概括
多环芳 (PAHs) 在阳极烤过程中被释放出来. 将氧气添加到氛围中可以显著降低高达75%的PAH排放量.
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.
- 材料科学 材料科学 材料科学
背景情况:
- 煤焦油,是多环芳 (PAH) 的主要来源,将石油焦炭结合在预烤的阳极中,用于电解.
- 在1100°C的阳极烤20天产生含有PAH和挥发性有机化合物 (VOC) 的烟气,需要排放控制.
研究的目的:
- 为了研究温度和大气对多环芳 (PAH) 排放在烤绿色阳极糊 (GAP) 的温度和大气的影响.
- 在各种热解和燃烧条件下量化PAH排放,重点关注CO2和O2添加的影响.
主要方法:
- 热解和燃烧实验是在高达750°C的温度下对绿色阳极糊 (GAP) 进行的.
- 在不同的大气层下分析了排放量:,含有5-10%的CO2,含有5-10%的O2.
- 使用EPA-16标准测量了多环芳 (PAH) 度.
主要成果:
- 来自GAP的PAH排放在251-500°C之间最为显著,主要由4-6个环形PAH物种组成.
- 在气氛中,每克GAP排放1645微克EPA-16PAH.
- 增加5-10%的CO2对PAH排放的影响最小,而增加5-10%的O2则将排放量减少了65-75%.
结论:
- 烤大气在阳极生产过程中极大地影响PAH排放.
- 添加氧气是一种有效的策略,可以显著减少绿色阳极糊 (GAP) 的多环芳 (PAH) 排放.
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