色谱顶空法测活度系数及对三元极性体系液液平衡预测
DOI: 10.3969/j.issn.1671-7627.2002.04.015, PP. 65-69
Keywords: 色谱顶空法,活度系数,液液平衡,uniquac
Abstract:
用气相色谱顶空分析法测定18组部分互溶三元极性体系在完全互溶区的3个组分活度系数,由此拟合出uniquac过量自由焓模型参数,再用uniquac方程预测液液平衡.这一方法曾很好地用在水-正烷烃-醇体系.将此法拓展到含醇、酮、酯,醚、卤烷烃和水等多种极性组分的三元体系液液平衡的预测,其结果与文献的液液平衡数据比较,平均均方根误差1.41%,表明本法对含极性组分的体系仍然可行.
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