低阶煤温和液化-炭化耦合转化过程及产物性质

Low rank coal mild liquefaction coupled with carbonization and its products

摘要: 基于低阶煤温和液化-炭化耦合工艺, 主要研究了390-450 ℃液化温度条件下的产物分布特征, 分析了所得液相产物和半焦的性质。结果表明, 有机液相产率达23.44%-33.26%(干燥无灰基煤为基准), 半焦产率达49.56%-68.72%(干燥无灰基煤为基准); 所得液相产物水含量为1.30%-2.49%, 不含固体颗粒, 有机液相产物的正己烷可溶物含量达98.95%以上; 所得半焦碳含量高达87.87%-93.45%(干燥无灰基), 部分半焦产物具有强黏结性的特点, 并且黏结性与其沥青质含量相关。

Abstract: The distribution of products was preliminarily studied based on a process of low rank coal mild liquefaction at 390-450 ℃ coupled with carbonization. The characteristics of liquid product and semi-coke were analyzed. The results showed that the organic liquid product yield is 23.44%-33.26% (daf, coal) and the semi-coke yield is 49.56%-68.72% (daf, coal). The water content of liquid product is 1.30%-2.49%. The n-hexane soluble content of organic liquid product is higher than 98.95% with no solid particles in liquid product. The carbon content of semi-coke obtained is 87.87%-93.45% (daf), some semi-cokes have the characteristics of strong caking property. There is a close correlation between caking property and asphaltene content of semi-coke.