实时分析H2O-NH4Ac提取煤的高温自发燃烧过程中演变的气体排放
Xiaoling Wang1, Guolan Dou2, Liying Zhang2
1School of Architectural Intelligence, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, China.
ACS omega
|April 14, 2025
概括
煤炭中固有的显著影响自发燃烧. 溶于水的加速气态产品的释放,改变热分解,增加H2,CH4,CO和CO2等排放量.
科学领域:
- * 地质化学和燃烧科学
- *专注于煤炭燃烧和气态产品分析.
背景情况:
- * 煤炭的自发燃烧是采矿和能源领域的一个关键问题.
- * 固有的矿物质,特别是在燃烧中的作用尚未完全理解.
研究的目的:
- * 为了研究固有的对煤炭高温自燃过程中气体产品释放的影响.
- *阐明不同形式的影响煤炭分解和燃烧的机制.
主要方法:
- *用水 (H2O),酸 (NH4OAc) 和盐酸 (HCl) 连续提取煤样,以分离.
- *感应合血质谱 (ICP-MS) 用于量化含量.
- * 里埃变换红外光谱 (FTIR) 用于分析煤炭的结构变化.
- *质谱和热重力测量分析 (TGA) 用于研究高温自燃.
主要成果:
- *所有测试的煤样本都含有水溶性,酸溶性和盐酸溶性.
- *采用H2O和NH4OAc的提取去除了碳酸盐组,降低了分解/点火温度.
- * H2O和有机结合的促进了异形侧链的裂变,增加了H2,CH4,CO和CO2的产量.
- *高H2O可溶性煤的水处理形成了Ca(OH) 2,加速了气态产品的释放 (H2,CH4,CO).
结论:
- *固有的,特别是水溶和有机结合的形式,显著影响煤的自燃.
- *改变热分解路径,影响释放的气体产品的类型和数量.
- *了解这些影响对于预测和减轻燃煤危害至关重要.
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