Wojtacha-Rychter Karolina, Smoliński Adam
Department of Mining Aerology, Central Mining Institute, Pl. Gwarków 1, 40-166 Katowice, Poland.
Central Mining Institute, Pl. Gwarków 1, 40-166 Katowice, Poland.
Materials (Basel). 2020 Feb 13;13(4):848. doi: 10.3390/ma13040848.
The self-heating phenomenon of coal leads to work safety hazards in underground mining. The quantitative analysis of gaseous products in mine atmosphere constitutes one of the detection methods of advanced coal heating. The article presents the results of tests on CO, CO, and H emissions during simulated heating of coal in the temperature range of 323-523 K. The oxidation of 15 Polish coals of various carbon contents was performed using a flow reactor technique. A chromatography method was applied to measure the changes of oxidation products concentrations with the increase of temperature. It has been determined that all the tested gases were generated at the initial temperature. The collected data indicated that CO was a major oxidation product in the entire temperature range, while the amounts of H produced did not exceed 0.49% volume. At the temperature of 323 K, the ratio of CO/CO was in the range of 10-23 but along with the temperature increase the ratio range narrowed to 3-4. In this paper, a comparison of the physical-chemical properties of the tested coals and the emissions profile of the gases using, among others, the hierarchical clustering analysis showed that samples with higher oxygen, sulfur, and inertinite content as well as lower ash and carbon content formed larger amounts of fire gases.
煤炭的自热现象会给地下采矿带来安全生产隐患。对矿井大气中气态产物进行定量分析是煤炭升温超前检测的方法之一。本文介绍了在323 - 523 K温度范围内模拟煤炭加热过程中CO、CO和H排放的测试结果。采用流动反应器技术对15种不同碳含量的波兰煤炭进行氧化。应用色谱法测量氧化产物浓度随温度升高的变化。已确定所有测试气体均在初始温度下产生。收集的数据表明，在整个温度范围内，CO是主要的氧化产物，而产生的H量不超过0.49%（体积）。在323 K温度下，CO/CO的比值在10 - 23范围内，但随着温度升高，该比值范围缩小至3 - 4。本文使用层次聚类分析等方法，对测试煤炭的物理化学性质和气体排放特征进行了比较，结果表明，氧、硫和惰质组含量较高且灰分和碳含量较低的样品会产生更多的火灾气体。
