水热法改性褐煤及含氧官能团与水相互作用的研究

利用水热法对蒙东褐煤进行了改性。通过微量热仪测定和分析了煤炭表面骨架大分子和各种官能团与水结合能的大小。结果表明,水热法改性后,褐煤中的羧基和羰基随温度升高显著降低,而羟基的变化比较复杂。计算得到了低阶煤中含氧官能团和煤炭表面骨架大分子亲水能力由大到小的顺序是羧基酚羟基羰基煤炭表面骨架大分子。

Study on lignite modified by hydrothermal and the interaction between the oxygen containing functional groups and water

An Mengdong lignite was modified by hydrothermal method. The water binding energy between the coal surface skeleton molecules and various oxygen containing functional groups was determined and analyzed by means of micro calorimeter. The results show that carboxyl and carbonyl significantly reduced with the increase of temperature, while the change of hydroxyl is complex. The order of hydrophilic ability from large to small for oxygen containing functional groups on coal surface is carboxyl, phenolic hydroxyl, carbonyl, large molecular of the coal.