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New Methods to Characterize the Surface and Interface Acid–Base Properties of Some Hydrocarbons by Inverse Gas Chromatography
Chromatographia ( IF 1.7 ) Pub Date : 2020-04-03 , DOI: 10.1007/s10337-020-03878-z
Tayssir Hamieh , Ali Abbasian , Negin Farshchi

The thermodynamic surface and interfacial properties of some hydrocarbons used as process oils in rubber industry were determined using the inverse gas chromatography technique at infinite dilution. In this paper, four different common process oils, such as distillated aromatic extract, treated distillate aromatic extract, mildly extracted solvate, and hydro-processed naphthenic oil, were studied. An important effect of the temperature on the dispersive component of the surface energy of different hydrocarbons was proved. These hydrocarbon materials exhibit a strong dependency of their surface acid–base properties on the temperature. The specific surface enthalpy and entropy, as well as the acid–base constants K A , K D and the amphoteric constant K of hydrocarbon surfaces, strongly depend on the temperature. It was proved that the hydro-processed naphthenic oil presents the highest acidity relative to other hydrocarbon materials. Graphic abstract

中文翻译:

通过反相气相色谱表征某些烃的表面和界面酸碱性质的新方法

在橡胶工业中用作加工油的一些碳氢化合物的热力学表面和界面性质是使用逆气相色谱技术在无限稀释下测定的。在本文中,研究了四种不同的常见加工油,例如蒸馏芳香提取物、处理过的蒸馏芳香提取物、温和提取的溶剂化物和加氢处理的环烷油。证明了温度对不同烃表面能分散分量的重要影响。这些碳氢化合物材料表现出其表面酸碱特性对温度的强烈依赖性。碳氢化合物表面的比表面焓和熵,以及酸碱常数 KA 、KD 和两性常数 K 强烈依赖于温度。事实证明,加氢处理的环烷油相对于其他烃类材料具有最高的酸度。图形摘要
更新日期:2020-04-03
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