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胜利褐煤ca2+负载量对其平衡复吸水含量的影响

, PP. 1025-1029

Keywords: 离子交换,相对蒸气压,平衡复吸水含量

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Abstract:

?以胜利褐煤为研究对象,利用xrf、ft-ir等手段,采用灰分、ph值、不同相对蒸气压下的复吸水含量等参数,研究了ca2+的离子效应对褐煤在不同相对蒸气压下复吸水含量的影响。研究结果表明,煤中ca2+的负载量随用于交换的钙离子溶液浓度的增大而增加。煤中ca2+的负载量对煤样的平衡复吸水含量影响较大,ca2+负载量越大,煤样的平衡复吸水含量越大。相对蒸气压高于92%平衡复吸水含量的主要控制因素为游离水分子与游离水分子之间的相互作用力。相对蒸气压在11%~92%平衡复吸水含量的主要控制因素为金属水簇ca+(h2o)n与毛细管之间的毛细管作用力。

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