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首页> 外文会议>Annual international Pittsburgh coal conference >Thermogravimetry Mass Spectrometry (TG-MS) Study of Pyrolytic Characteristics of Two Different-maturation Lignites
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Thermogravimetry Mass Spectrometry (TG-MS) Study of Pyrolytic Characteristics of Two Different-maturation Lignites

机译：热重质谱（TG-MS）研究两种不同成熟度褐煤的热解特性

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Lignite pyrolysis is an extremely complex process. No single analysis method can thoroughly unravel the complex compositions of products, especially liquid compounds. In this study, we use TG-MS technique to investigate the pyrolytic behaviors of Yuxi lignite and Hami lignite. Proximate and ultimate analyses showed that Yuxi lignite had a lower maturation than Hami lignite. Mass spectrometry was used to examine the evolutions of a wide range of pyrolysis compounds including gases (H_2, CO, CO_2, CH_4, C_2H_6, C_2H_2, C_2H_4, C_3H_6 and C_3H_8) and condensable liquid compounds including water, methanol (m/z=32), ethanol (m/z=46), acetic acid (m/z=60), acetone or propanol (m/z=58)), furan (m/z=68), furfural (m/z=96), phenols. It was interesting to find that furan and furfural were evolved from both lignites at lower temperature. These two compounds were degraded from the preserved cellulose composition in the two lignites. Another interesting observation was that ethanol and acetone were released from both lignites with relatively high total ion signals. These compounds were rarely reported as a lignite pyrolysis product because it could not easily collected in the condensed tar. Compared to Hami lignite, aliphatic oxygenates showed stronger ion intensities for Yuxi lignite, consistent with a higher oxygen content in it. It was also reasonably observed that Hami lignite produced more cyclic oxygen compounds than YX lignite.
机译：褐煤热解是一个极其复杂的过程。没有任何一种分析方法可以彻底弄清产品（尤其是液体化合物）的复杂组成。在这项研究中，我们使用TG-MS技术研究玉溪褐煤和哈密褐煤的热解行为。近期和最终分析表明，玉溪褐煤的成熟度低于哈密褐煤。质谱用于检查包括气体（H_2，CO，CO_2，CH_4，C_2H_6，C_2H_2，C_2H_4，C_3H_6和C_3H_8）在内的各种热解化合物以及包括水，甲醇（m / z = 32 ），乙醇（m / z = 46），乙酸（m / z = 60），丙酮或丙醇（m / z = 58）），呋喃（m / z = 68），糠醛（m / z = 96） ，酚。有趣的是，呋喃和糠醛是在较低的温度下从两种褐煤中析出的。这两种化合物从两种褐煤中保存的纤维素成分中降解。另一个有趣的观察结果是，乙醇和丙酮从两种褐煤中均以相对较高的总离子信号释放出来。这些化合物很少被报道为褐煤热解产物，因为它不容易收集在冷凝的焦油中。与哈密褐煤相比，脂肪族含氧化合物对玉溪褐煤具有更强的离子强度，与其中较高的氧含量相符。还可以合理地观察到，哈密褐煤比YX褐煤产生更多的环状氧化合物。

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