Effect of Tetrabutylammonium Acetate Addition on the Aggregation of Coal Molecules at Solution and Solid States
Effect of Tetrabutylammonium Acetate Addition on the Aggregation of Coal Molecules at Solution and Solid States
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DOI：
10.1021/ef000230z
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发表时间：
2001-02
期刊：
影响因子：
5.3
通讯作者：
H. Shui;K. Norinaga;M. Iino
中科院分区：
文献类型：
--
作者：
H. Shui;K. Norinaga;M. Iino
研究了四丁基乙酸铵（TBAA）的加入对煤基材料在溶液和固体状态下聚集的影响。作为煤衍生的材料，使用Upper Freeport煤的提取物的吡啶不溶性级分（PI）。通过对PI在N-甲基-2-吡咯烷酮（NMP）中的溶液进行溶剂脱除，得到了两种在NMP中溶解度差异较大的固体形态。当使用CS2/NMP混合溶剂代替NMP时，获得类似的结果。红外光谱、元素分析和X射线衍射分析表明，这两种PI具有不同的分子聚集状态，这可能是它们在溶液中聚集状态的反映。
Effect of tetrabutylammonium acetate (TBAA) addition on the aggregation of coal-derived materials at solution and solid states was investigated. As coal-derived materials, a pyridine-insoluble fraction (PI) of the extract of Upper Freeport coal was used. Two kinds of the solid states with quite different solubility in N-methyl-2-pyrrolidinone (NMP) were obtained for PI by the removal of the solvents from its solution in NMP with and without TBAA, respectively. Similar results were obtained when CS2/NMP mixed solvent was used instead of NMP. Characterizations of these two types of PI by FT-IR, elementary, and XRD analysis suggest that they have different states of molecular aggregation, which seem to be the reflection of their aggregation states in solution.