The role of sorption of water vapour in the spontaneous heating of coal
The role of sorption of water vapour in the spontaneous heating of coal
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DOI：
10.1016/0016-2361(71)90026-3
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发表时间：
1971-10
期刊：
影响因子：
7.4
通讯作者：
K. Bhattacharyya
中科院分区：
文献类型：
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作者：
K. Bhattacharyya
在等温条件下，用量热计测量了不同煤在水蒸气吸附过程中的放热速率。已经观察到，特定煤的产热率随着煤的平衡湿度的缺乏而增加，即随着空气和煤的平衡湿度的不同而增加。对于给定的煤，由于氧化而产生的热量与由于吸收水蒸气而产生的热量相比，可以忽略不计。在除无烟煤外的干煤试验中，在速率曲线的开始处观察到一个小的“峰”；人们试图解释这一现象。结果还表明，在一定的试验条件下，煤的特征放热速率与煤的类型、粒度和风化有关。
Laboratory experiments have been carried out to measure the rates of heat release from different coals by a calorimeter during sorption of water vapour in isothermal conditions. It has been observed that the rate of heat generation in a particular coal increases with the equilibrium humidity deficiency of the coal, i.e.with the difference of equilibrium humidity of air and coal. For a given coal, the rate of heat generation due to oxidation has been found to be negligible in comparison with that due to sorption of water vapour. A small ‘peak’ at the beginning of the rate curves has been observed during the tests with dry coals, with the exception of anthracite; explanations for this phenomenon have been attempted. The results also show that under a given test condition the characteristic rate of heat release is dependent on the type of coal, its particle size and its weathering.