A thermal behavior study of Chinese coals with high hydrogen content

A thermal behavior study of Chinese coals with high hydrogen content
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中国高氢煤的热行为研究

DOI:
10.1016/j.coal.2009.10.012
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发表时间:
2010-01
影响因子:
5.6
通讯作者:
唐跃刚
唐跃刚
中科院分区:
工程技术2区
文献类型:
--
作者:
唐跃刚

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对富含树皮体的多种中国煤在氮气气氛中以三种加热速率(10、15和25°Cmin−1)进行热重分析,并在330°C至500°C以3°Cmin− 1的速率进行Gieseler塑性测定。富树皮岩样品含有较高的氢和挥发分含量,并具有较高的H/C原子比其他类似级别的煤。氢和树皮体含量之间有很好的相关性。热曲线显示出单调的重量损失和反应是激烈的。升温速率对热重曲线的影响不大,特别是对于富含树皮体的煤样。此外,发现两个良好的线性关系之间的H/C的原子比和从DTG曲线导出的重要参数:总质量损失和最大质量损失速率。研究了由热重分析和热塑性分析得到的特征参数之间的相关性。
A variety of Chinese coals, rich in barkinite, were studied by thermogravimetric analysis in a nitrogen atmosphere at three heating rates (10, 15 and 25°Cmin−1), as well as fluidity measurement by Gieseler plastometry at a rate of 3°Cmin−1from 330°C to 500°C. Barkinite-rich samples contained higher hydrogen and volatile matter contents and possessed higher H/C atomic ratios than other coals of similar rank. A good correlation between hydrogen and barkinite content was observed. The thermal profiles showed a monotonic weight loss and the reactions were intense. The TGA curves were not greatly affected by the heating rate applied, especially for those coal samples rich in barkinite. In addition, two good linear relationships were found between the H/C atomic ratio and the important parameters derived from DTG curves: total mass loss and the maximum rate of mass loss. The correlations of characteristic parameters derived from thermogravimetric analysis and thermoplastic analysis were also investigated.
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