Abstract
The solubility of triethylene glycol in supercritical methane was measured at temperatures of 298.15 and 316.75 K and pressures up to 9 MPa using a static saturation apparatus with volume displacement. The relative uncertainty of the experimental data amounts to less than ±12%. The data can be reproduced with reasonable accuracy using the generalized cubic Peng–Robinson as well as the Soave–Redlich–Kwong equations of state in combination with the quadratic mixing rule, whereas two temperature dependent binary interaction parameters were fitted for the referring system. The mean logarithmic deviation for the triethylene glycol solubility in methane is roughly 24.7% in case of the Peng–Robinson, but only 4.6% in case of the Soave–Redlich–Kwong equation of state.
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