In this study the devolatization behaviour of lignite samples, of various grain sizes, on a wire mesh reactor is evaluated. Lignite samples were rapidly heated at four different temperatures (300, 500, 700 and 900 °C). The feed lignite reveals a high content of huminite, a low inertinite and liptinite contents in the Kostolac samples and a slightly higher liptinite content in the Kolubara samples. The char obtained at 300 °C and 500 °C shows slight petrographic and chemical changes. The major changes in chemical and petrographic compositions were observed in char heated at higher temperatures (700 °C and 900 °C). FTIR spectral data for both Kolubara and Kostolac lignite samples reveal a decrease in aliphatic- and oxygen­containing structures with increase in temperatures from 300 to 700 °C. The lack of aliphatic and oxygen-containing structures, the breakdown of clay minerals and negligible amount of water are detected in samples devolatilized at 900 °C where aromatic structures dominate.

中文翻译：

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Kolubara 和 Kostolac 褐煤（塞尔维亚）在燃烧过程中的脱挥行为：案例研究


在本研究中，评估了各种粒度的褐煤样品在金属丝网反应器上的挥发行为。褐煤样品在四种不同的温度（300、500、700 和 900 °C）下快速加热。饲料褐煤显示 Kostolac 样品中的腐殖石含量高，惰性石和脂石含量低，而 Kolubara 样品中的脂石含量略高。在 300 °C 和 500 °C 下获得的焦炭显示出轻微的岩相和化学变化。在较高温度（700 °C 和 900 °C）下加热的炭化物中观察到化学和岩石成分的主要变化。Kolubara 和 Kostolac 褐煤样品的 FTIR 光谱数据显示，随着温度从 300 °C 升高到 700 °C，脂肪族和含氧结构会减少。 在芳香族结构占主导地位的 900 °C 脱挥样品中检测到缺乏脂肪族和含氧结构、粘土矿物的分解和可忽略不计的水量。