煤溶胀动力学与热力学的研究

Kinetics and thermodynamics of coal swelling

以煤溶胀机理、氢键等为基础,从热力学和动力学方面综述了煤溶胀的本质,讨论了溶剂性质、氧化、温度、煤粉粒度及热处理对溶胀动力学的影响。结果表明:溶胀过程中,表观活化能和速率常数不仅与溶剂分子的空间属性有关,还受溶剂分子形状的影响;混合溶剂的协同效应极大地提升了溶胀速率,增大了表观活化能;抽提煤的干燥条件不同及煤经过氧化后,溶胀机理均会发生明显改变。最后详细介绍了煤溶胀技术对煤分子结构的影响及在煤液化方面的应用。

Based on the mechanism of coal swelling and hydrogen bond within the coal, introduce the nature of coal swelling from the aspects of kinetics and thermodynamics. Investigate the influence of solvents properties, oxidation, temperature, particle size and heat treatment on swelling kinetics. The results show that, during the swelling process, apparent activation energy and rate constant are influenced by the steric properties and shape of solvent molecular. The synergistic effect of mixed solvent increase the swelling rate and apparent activation energy. Drying condition of extracted coal and oxidation of raw coal can transform swelling mechanism greatly. Introduce the application of coal swelling technology in coal molecular structure and coal liquefaction process study.