Thermal and oxidation chemistry of coal at low temperatures
Thermal and oxidation chemistry of coal at low temperatures
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DOI：
10.1016/0016-2361(85)90348-5
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发表时间：
1985-10
期刊：
影响因子：
7.4
通讯作者：
J. Gethner
中科院分区：
文献类型：
--
作者：
J. Gethner
用原位红外光谱研究了伊利诺斯6号煤（hv C）和生皮煤（SBB C）在100°C下热预处理以及伊利诺斯6号煤随后在100°C下用O2氧化时发生的化学反应。差分光谱学观察到显著的光谱变化。在100°C下真空干燥导致羧酸物质分解以形成各种新的羰基物质（在Rawhide中）和脱羧或脱羰基的煤（Illinois No.6）。预干燥的伊利诺斯州6号煤的氧化导致新的羰基物种的形成。认为干燥不会改变煤的化学成分的假设可能是不正确的。因此，在中温反应研究中观察到的总体光谱（和化学）变化可能取决于样品的预处理、干燥和储存。此外，反应研究中使用的时间/温度曲线可能会通过改变不同反应的相对贡献来影响观察到的总体变化。
The chemical reactions which occur when Illinois No. 6 (hv C) and Rawhide (SBB C) coals are thermally pretreated at 100°C and when Illinois No. 6 coal is subsequently oxidized at 100°C with O2have been studied using in-situ FT-i.r. differende spectroscopy. Significant spectroscopic changes were seen. Vacuum drying at 100°C resulted in the decomposition of carboxylic acid species to form a variety of new carbonyl species (in Rawhide) and decarboxylated or decarbonylated coal (Illinois No. 6). Oxidation of predried Illinois No. 6 coal leads to the formation of new carbonyl species. The assumption that drying does not alter the chemical composition of coal may not be correct. Thus, overall spectroscopic (and chemical) changes observed in moderate temperature reaction studies may depend upon sample pretreatment, drying and storage. In addition, the time/temperature profile used in a reaction study may affect the overall changes observed by altering the relative contribution of the different reactions.