色谱法测烷烃和芳烃在正三十六烷中的热力学参数  

Determination of Thermodynamic Parameters for Alkanes and Aromatic Hydrocarbons in n-Hexatriacontane by Chromatography

作　　者：蒋严军[1] 王丽华[1] 胡望明[1] 

机构地区：[1]浙江大学化工系,浙江杭州310027

出　　处：《浙江化工》2005年第12期38-40,37,共4页Zhejiang Chemical Industry

摘　　要：通过气相色谱法,测定芳烃和部分正烷烃在正三十六烷中的亨利系数和无限稀释活度系数,同时测定正三十六烷的冰点。测定时考虑了固定液流失量和气相非理想性的校正,并用溶液热力学理论分析和讨论了无限稀释活度系数和温度的关系以及亨利系数和溶质碳数的关系。结果表明:无限稀释活度系数随着温度的升高而减少,亨利系数随着溶质碳数的增加而减少。Henry＇s coefficients and activity coefficients at infinite dilution for alkanes and aromatic hydrocarbons in n-hexatriacontane were measured by gas chromatography at different temperatures. The n-hexatriacontane＇s melting point was also determined simultaneously. The method of calculating the loss of stationary liquid and the correction for non-ideality of gases were studied. We examed and analyzed the relationship between Henry＇s coefficients and solute carbon number, so does the relations between temperatures and activity coefficients at infinite dilution. The results show that lnH of alkanes and aromatic hydrocarbons decreases as solute carbon number increased, lnH of alkanes and aromatic hydrocarbons decrease as the temperature increased.

关 键 词：无限稀释活度系数 亨利系数 烷烃 芳烃 正三十六烷 气相色谱 

分 类 号：O657.71[理学—分析化学] O621.4[理学—化学]