在煤炭低温氧化过程中产生的气体的定量计算
Jinhu Li1,2, Qin Cao1, Wei Lu3
1Key Laboratory of Safe and Effective Coal Mining, Anhui University of Science and Technology, Ministry of Education, Huainan, 232001, People's Republic of China.
Environmental science and pollution research international
|October 18, 2023
概括
这项研究引入了一种新的定量方法,用于测量煤炭氧化过程中的气体演变,提高了对旧方法的准确性. 这些发现表明,气体生产和能量损失与氧气度有关,这对于了解煤炭自燃燃烧至关重要.
科学领域:
- 煤炭化学和燃烧科学 煤炭化学和燃烧科学
- 环境监测和污染物评估
背景情况:
- 煤的低温氧化产生了对于评估氧化状态和气态污染物至关重要的气体.
- 使用气体度的现有半定量方法存在缺陷,需要更准确的方法.
研究的目的:
- 开发和介绍一种定量计算方法,用于确定煤炭氧化过程中的气体产物.
- 为了准确测量气体产量,质量流速和低温煤炭氧化过程中的能量损耗.
主要方法:
- 使用流动反应堆进行低温煤炭氧化 (30-180°C) 的实验.
- 使用 (N2) 作为惰性标记气体来计算反应产品的质量流量.
- 根据实验数据,应用了定量公式来确定气体产量和能量损失.
主要成果:
- 在所有煤样本中确定了主要气体产品的顺序为CO2 > CO > CH4.
- 证明了气体生产和氧气度之间的直接比例 (例如,MTH煤:381.44到8562.80g/从0%到21%O).
- 由于氧化而导致的量化能量损失,与氧气度显著增加 (MTH煤: 520.52至26,772.73 kJ/).
结论:
- 开发的定量方法准确地反映了煤炭氧化过程中的真实气体演变,排放和能量损失.
- 这些发现对于理解煤炭自燃机制和评估相关气体污染物至关重要.
- 氧气度是影响煤炭氧化过程中气体产生和能量损失的关键因素.
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