研究燃料含氧化合物在水介质中的溶解度与温度和叔丁醇浓度的关系。

Study of fuel oxygenates solubility in aqueous media as a function of temperature and tert-butyl alcohol concentration.

作者信息

Gonzalez-Olmos R, Iglesias M

机构信息

Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Campus Sescelades, 43007 Tarragona, Spain.

出版信息

Chemosphere. 2008 May;71(11):2098-105. doi: 10.1016/j.chemosphere.2008.01.017. Epub 2008 Mar 4.

DOI:10.1016/j.chemosphere.2008.01.017

PMID:18299142

Abstract

Methyl tert-butyl ether (MTBE) is the most widely used oxygenate in gasoline blending and has become one of the world's most widespread groundwater and surface water pollutants. Alternative oxygenates to MTBE, namely ethyl tert-butyl ether (ETBE), tert-amyl ether (TAME) and diisopropyl ether (DIPE) have been hardly studied yet. The solubility of these chemicals is a key thermodynamic information for the assessment of the fate and transport of these pollutants. This work reports experimental data of water solubility at the range from 278.15 to 313.15K and atmospheric pressure of ethers used in fuels (MTBE, ETBE, TAME and DIPE) due to the strong influence of temperature on its trend. From the experimental data, temperature dependent polynomials were fitted, thermodynamic parameters were calculated and theoretical models were used for prediction. Finally, the tert-butyl alcohol (TBA) influence in the solubility of MTBE and ETBE in aqueous media was studied.

摘要

甲基叔丁基醚（MTBE）是汽油调合中使用最广泛的含氧化合物，已成为全球最普遍的地下水和地表水污染物之一。然而，MTBE的替代含氧化合物，即乙基叔丁基醚（ETBE）、叔戊基醚（TAME）和二异丙基醚（DIPE），尚未得到充分研究。这些化学品的溶解度是评估这些污染物归宿和迁移的关键热力学信息。由于温度对其趋势有强烈影响，本研究报告了燃料中使用的醚类（MTBE、ETBE、TAME和DIPE）在278.15至313.15K温度范围和大气压下的水溶性实验数据。根据实验数据，拟合了温度相关多项式，计算了热力学参数，并使用理论模型进行预测。最后，研究了叔丁醇（TBA）对MTBE和ETBE在水介质中溶解度的影响。