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OALib Journal期刊
ISSN: 2333-9721
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酸洗脱灰及离子交换对低阶煤热溶剂提质分离的影响
, PP. 897-904
Keywords: 热溶剂萃取,低阶煤,脱灰,离子交换,预处理
Abstract:
？采用酸洗脱灰、酸洗和na/co离子交换对两种低阶煤（mm和ly）进行预处理，然后以1-甲基萘为溶剂对预处理煤进行热溶剂提质萃取，把煤分成提质煤（uc）、高分子量萃取物（deposit）和低分子量萃取物（soluble）3种主要固体组分，以及少量水和气体产物。结果表明，通过脱灰和离子交换均提高了两种萃取物的收率及碳含量，并明显促进了煤中含氧官能团的脱除。脱灰后mm煤的高分子量萃取物收率从3.5%增加到9.5%，na离子交换ly的低分子量萃取物的碳含量高达85.3%、氧含量低于6.4%。离子交换对两种萃取物的物理化学性质有明显的影响，na+的影响尤为显著。酸洗脱灰和离子交换对低阶煤热溶剂提质萃取有明显促进作用。
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