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OALib Journal期刊
ISSN: 2333-9721
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k+、na+、ca2+、mg2+对胜利褐煤平衡复吸水的影响
, PP. 385-391
Keywords: 褐煤,离子交换,ft-ir,平衡复吸水含量,离子水合作用
Abstract:
？以胜利褐煤为研究对象，利用ft-ir等手段，用灰分、不同湿度下的平衡复吸水含量等，系统研究了不同相对湿度下k+、na+、ca2+、mg2+的水合作用对胜利褐煤平衡复吸水含量的影响。结果表明，相同浓度不同类型的金属离子与煤样的交换能力的趋势为ca2+>na+>k+>mg2+。金属离子对胜利褐煤平衡复吸水含量影响力的顺序为mg2+>ca2+>na+≈k+。相对湿度高时，平衡复吸水含量的主要控制因素为游离水分子之间的分子作用力；相对湿度中等时，平衡复吸水含量的主要控制因素为金属水簇与毛细管之间的毛细管作用力；相对湿度低时，平衡复吸水含量的主要控制因素为金属离子的水合作用。
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