含氧官能团对褐煤持水能力的影响研究

Influence of oxygen-containing functional groups on lignite water holding capacity

为降低褐煤水分,提高褐煤利用效率,通过研究在不同湿度环境中内蒙古和云南2种褐煤的持水能力,分析了褐煤表面含氧官能团和大分子骨架对褐煤持水作用的贡献,以及表面含氧官能团对褐煤持水量的定量关系。结果表明:褐煤的持水能力与褐煤中羧基和羟基含量之和成正比。煤炭大分子骨架对褐煤持水能力影响不明显。环境的湿度对褐煤的持水作用影响非常显著。

In order to decrease moisture of lignite and improve lignite utilization efficiency,the influencing factors of lignite water holding capacity were investigated.The contribution of oxygen-containing functional groups and macromolecular skeleton on Mongolia and Yunnan lignite on water holding capacity was analyzed by changing environment humidity.Meanwhile,the quantitative relation between oxygen-containing functional groups and water holding capacity was determined.The results showed that the water holding capacity was proportional to the total content of carboxyl and hydroxyl in lignite.The influence of coal macromolecular skeleton on water holding capacity was not distinct,while the environment humidity showed significant influence.