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两种热模拟体系下热解产物的相关性研究

Keywords: 热模拟实验,开放体系,封闭体系,资源量计算

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Abstract:

?对南宁褐煤在封闭体系和开放体系下开展了热模拟实验,并对其在2种热模拟体系下的氢气、气态烃和液态烃产率的演化特征以及相互关系进行了研究。结果表明,在煤岩热解生烃过程中,封闭体系下液态烃出现的温度区间为250~600℃,开放体系下液态烃出现的温度区间为250~550℃。通过氢气、气态烃和液态烃产率的对比分析,发现液态烃是影响有机质发生缩聚反应的主要因素。2种热模拟体系下,氢气和气态烃产率分别与液态烃产率呈负相关关系,而氢气和气态烃产率呈正相关关系,且三者的总演化趋势相同,说明有机质演化是一个稳定的过程,和自身化学键的键能密切相关。在高温阶段,2种热模拟体系下的气态烃产率基本相同,因此在计算生气量时,产气率数据的选择要考虑演化程度的影响。

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