Effect of hydrothermal treatment on the extraction of coal in the CS2/NMP mixed solvent
Effect of hydrothermal treatment on the extraction of coal in the CS2/NMP mixed solvent
复制标题
水热处理对CS2/NMP混合溶剂萃取煤的影响
DOI：
10.1016/j.fuel.2006.02.005
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发表时间：
2006-09
期刊：
影响因子：
7.4
通讯作者：
Wang, Zhicai
中科院分区：
文献类型：
--
作者：
Shui, Hengfu;Wang, Gaoqiang;Wang, Zhicai
采用二硫化碳/N-2-吡咯烷酮（CS2/NMP）混合溶剂（体积比1：1）在室温下对四种不同等级的烟煤进行萃取。结果发现，四种煤中的一种中烟煤原煤的提取率超过 74% (daf)，表明该煤存在关联结构模型。对四种煤在不同条件下进行水热处理，发现处理后煤的提取率明显提高。这对于煤炭液化具有重要意义。 FTIR 测量显示，煤水热处理后矿物质被去除，这表明由于离子相互作用和/或氢键断裂而导致煤聚集结构的解离，因为氧和羟基氧通过离子途径被去除，从而导致处理过的煤的提取率增加。然而，通过水热处理打破π-阳离子相互作用可能是提高高等级处理煤的提取率的可能机制之一。文章对煤的水热处理机理进行了探讨。
The extraction of four Chinese different rank bituminous coals with the carbon disulfide/N-2-pyrrolidinone (CS2/NMP) mixed solvent (1:1 by volume) was carried out in room temperature. It was found that one of middle bituminous raw coal of the four coals gave more than 74% (daf) extraction yield, suggesting an associative structural model for the coal. The four coals were hydrothermal treated under different conditions, and it was found that the extraction yields of the treated coals obviously increased. This will have great significance for coal liquefaction. FTIR measurements show the removal of minerals after the hydrothermal treatment of coals suggesting the dissociation of the coal aggregation structure due to ionic interactions and/or hydrogen bonds broken because of the removal of oxygen and hydroxyl oxygen proceeded through ionic pathways, resulting in the extraction yields of the treated coals increase. However, breaking of π-cation interactions by hydrothermal treatment may be one of possible mechanisms for the enhancement of extraction yield of higher rank of treated coal. The mechanism of hydrothermal treatment of coal was discussed in the paper.
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影响因子：
5.3
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