Thermal dissolution of Shenfu coal in different solvents
Thermal dissolution of Shenfu coal in different solvents
复制标题
神府煤在不同溶剂中的热溶解
DOI：
10.1016/j.fuel.2012.11.005
复制
发表时间：
2013-06-01
期刊：
影响因子：
7.4
通讯作者：
Wang, Wenwen
中科院分区：
文献类型：
--
作者：
Shui, Hengfu;Zhou, Yan;Wang, Wenwen
本研究研究了神府（SF）煤（一种中国次烟煤）在不同温度下在不同溶剂中的热溶解（TD）行为。结果表明，原煤中几乎所有的灰分都转移到了TD残渣中。以1-甲基萘(1-MN)为溶剂，随着TD温度从300℃升高到360℃，持续60min，SF煤的TD可溶产率(TDSY)增加，在360℃时TDSY最高，达到56%。进一步升高温度到380℃，TDSY迅速下降。在360℃时获得的最高TDSY可归因于SF煤的部分热解。当1-MN中添加N-甲基-2-吡咯烷酮(NMP)或甲醇时，TDSY大大增加。特别是当添加20%的NMP时，TDSY达到75%。由于NMP是强极性溶剂，它可以解离煤中的强交联，导致TDSY增加。然而，当NMP和甲醇同时添加到1-MN中时，TDSY急剧下降，这表明两种溶剂之间存在一定的相互作用。粗甲基萘油（CMNO）是SF煤TD比1-MN更有效的溶剂，其TDSY在360℃、60min时达到66%。在CMNO中添加各种极性溶剂，TDSY下降，尤其是甲醇的添加，TDSY下降约15%。结果表明，甲醇可能与CMNO中的一些活性组分发生反应，导致TD效应降低。当将NMP和甲醇同时添加到CMNO中时，由于它们之间的相互作用，TDSY急剧下降。通过元素和 FTIR 分析对从各种溶剂中获得的 TD 可溶组分 (TDSF) 进行了表征。 (C) 2012 Elsevier Ltd. 保留所有权利。
The thermal dissolution (TD) behaviors of Shenfu (SF) coal, a kind of Chinese sub-bituminous coal at different temperatures in different solvents were investigated in this study. The results show that almost all of the ash in the raw coal was transferred into the TD residue. The TD soluble yield (TDSY) of SF coal increased with the raising of TD temperatures from 300 to 360 degrees C for 60 min with 1-methylnaphthalene (1-MN) as solvent, and the highest TDSY of 56% was obtained at 360 degrees C. Further raising temperature to 380 degrees C, the TDSY decreased rapidly. The highest TDSY obtained at 360 degrees C can be attributed to the partial pyrolysis of SF coal.When N-methyl-2-pyrrolidinone (NMP) or methanol was added into 1-MN, the TDSY greatly increased. Especially, when 20% NMP was added, the TDSY reached up to 75%. Since NMP is a strongly polar solvent, it can dissociate the strong cross-links in the coal, resulting in the increase of the TDSY. However, when both of NMP and methanol were added into 1-MN, the TDSY dramatically decreased, indicating that there are some interactions between the two solvents.Crude methyl naphthalene oil (CMNO) was a more effective solvent for the TD of SF coal than 1-MN, and its TDSY achieved 66% at 360 degrees C for 60 min. Addition of various polar solvents into CMNO, the TDSY decreased, especially for the addition of methanol, the TDSY decreased by about 15%. The result indicated that methanol may react with some active fractions in CMNO, resulting in the decrease of the TD effect. When both of NMP and methanol were added into CMNO, the TDSY dramatically decreased due to the interaction between them. The TD soluble fractions (TDSFs) obtained from various solvents were characterized by elemental and FTIR analyses. (C) 2012 Elsevier Ltd. All rights reserved.