Characterisation of HyperCoals from coals of various ranks
Characterisation of HyperCoals from coals of various ranks
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DOI：
10.1016/j.fuel.2007.02.017
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发表时间：
2008-04
期刊：
影响因子：
7.4
通讯作者：
T. Takanohashi;Takahiro Shishido;H. Kawashima;I. Saito
中科院分区：
文献类型：
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作者：
T. Takanohashi;Takahiro Shishido;H. Kawashima;I. Saito
对通过在300至420°C的温度下用1-甲基萘热提取不同煤阶的煤60分钟而产生的无灰煤（HyperCoal）进行了表征。HyperCoal具有许多容易挥发和分解的轻质组分，并且具有较高的热反应性。所有的HyperCoals在加热过程中都表现出很高的热塑性;特别是，从低等级的Pasir和Mulia煤中获得的HyperCoals在接近150°C的温度下开始表现出很高的热塑性。在提高巴西亚烟煤的提取温度时，加热过程中的重量损失减少，再固化温度向更高的温度转移。这些结果表明，在较高温度下获得的Pasir-HyperCoal含有更多相对较重的组分。核磁共振结果表明，随着萃取温度的升高，芳香碳的比例增加，表明发生了一些改性反应。
Ashless coals (HyperCoal) produced by thermal extraction of coals of different ranks with 1-methylnaphthalene at temperatures from 300 to 420°C for 60min were characterised. HyperCoal has many light components that are easily volatised and decomposed, and it has high thermal reactivity. All the HyperCoals showed high thermoplasticity during heating; in particular, HyperCoals obtained from low-rank Pasir and Mulia coals showed high thermoplasticity beginning at temperatures near 150°C. On increasing the extraction temperature for Pasir sub-bituminous coal, the weight loss during heating decreased and the resolidification temperature shifted to higher temperatures. These results suggest that the Pasir-HyperCoal obtained at higher temperatures contains more, relatively heavy components. Nuclear magnetic resonance measurements showed that the ratio of aromatic carbon increased with increasing extraction temperature, indicating that some modification reactions occurred.