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3577025 
Journal Article 
Molar Heat Capacity of Aqueous Sulfolane, 4-Formylmorpholine, 1-Methyl-2-pyrrolidinone, and Triethylene Glycol Dimethyl Ether Solutions from (303.15 to 353.15) K 
Mundhwa, M; Elmahmudi, S; Maham, Y; Henni, Amr 
2009 
Yes 
Journal of Chemical and Engineering Data
ISSN: 0021-9568
EISSN: 1520-5134 
54 
10 
2895-2901 
WOS:000270461200017 
The present study has focused on the experimental measurements of the molar heat capacities of four aqueous physical solvents of importance in natural gas sweetening: (1) tetramethylene sulfone (sulfolane), (2) 4-formylmorpholine (NFM), (3) 1-methyl-2-pyrrolidinone (NMP), and (4) triethylene glycol dimethyl ether (TEGDME). The measurements of the molar heat capacities were carried out in the temperature range of (303.15 to 353.15) K and for the entire range of mole fractions. Fractional deviations of the measured molar heat capacities from literature data were less than 1%, and at worst 2%. Molar excess heat capacities were calculated from the measurements and correlated as a function of mole fraction and temperature employing the Redlich-Kister equation. The excess partial molar quantities (C(i)(o) - C(i)(*)) were calculated by extrapolating the reduced excess heat capacity (C(p)(E)/x(1)x(2)) function at x(1) = 0 and x(1) = 1.