Solubilization of Taiheiyo coal under mild conditions without gaseous hydrogen: catalysis by trifluoromethanesulfonic acid
Solubilization of Taiheiyo coal under mild conditions without gaseous hydrogen: catalysis by trifluoromethanesulfonic acid
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DOI：
10.1016/0016-2361(95)00010-3
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发表时间：
1995-06
期刊：
影响因子：
7.4
通讯作者：
K. Shimizu;H. Karamatsu;A. Inaba;A. Suganuma;I. Saito
中科院分区：
文献类型：
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作者：
K. Shimizu;H. Karamatsu;A. Inaba;A. Suganuma;I. Saito
在异戊烷存在下，三氟甲磺酸（TFMS）在150°C和6.0- 6.8MPa的自生压力下，在3 h内几乎完全将煤转化为吡啶可溶物。苯可溶和THF不溶性吡啶可溶馏分的化学结构随酸浓度而变化。较低的酸浓度提供高的芳香度和丰富的Hα，而较高的酸浓度提供较高的Hβ和Hγ。溶煤馏分尽管发生了解聚，但仍含有许多含氧官能团。醚键保留在吡啶不溶性部分中，导致高分子量。氧官能团的分子间氢键似乎是该部分溶解度有限的另一个原因。
Trifluoromethanesulfonic acid (TFMS) was found to convert coal almost completely to pyridine-solubles in the presence of isopentane at 150°C in 3 h under autogenous pressure of 6.0–6.8 MPa. The chemical structure of the benzene-soluble and THF-insoluble-pyridine-soluble fractions varied with the acid concentration. Lower acid concentrations provided high aromaticity and rich Harand Hα, while higher acid concentrations gave higher Hβand Hγ. The solubilized coal fractions bore many oxygen functional groups in spite of depolymerization. The ether bonds remained in the pyridine-insoluble fraction, resulting in a high molecular weight. Intermolecular hydrogen bonding of oxygen functional groups appears to be another cause of limited solubility of this fraction.