Solubility of High Molecular Mass Methyl Esters in Supercritical Ethane
نویسنده
چکیده
This paper presents trends in the high pressure solubility measurements of long chain saturated methyl esters (methyl decanoate, methyl dodecanoate, methyl tetradecanoate, methyl hexadecanoate, methyl octadecanoate and methyl docosanoate) in supercritical ethane between 313 K and 353 K and for mass fractions between 0.65 and 0.018. The data shows generally a linear relationship between the solubility pressure and the temperature with complete solubility below 17 MPa. No three phase regions or temperature inversions were observed while maxima in the solubility pressures were found for methyl ester mass fractions usually between 0.2 and 0.3. When the solubility pressure is plotted as a function of carbon number at constant temperature and mass fraction methyl ester, a linear relationship is realised. When the measured solubility of the methyl ester is compared to that of the corresponding alkane, all in supercritical ethane, it was found that the methyl ester requires higher pressures for total solubility. The difference between the solubility of the methyl ester and the alkane in supercritical ethane is larger than in supercritical propane.
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