Shu-Yu Lin, R. Leron, Meng-Hui Li
Jan 10, 2014
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0
Influential Citations
10
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Journal
Thermochimica Acta
Abstract
Abstract The molar heat capacities, C P , of two new potential polyamine CO 2 absorbents: diethylenetriamine (DETA) and 3-(methylamino)propylamine (MAPA), their aqueous binaries, and aqueous ternaries containing piperazine (PZ) were measured at temperatures from 303.15 K to 353.15 K. Measurements were performed at atmospheric pressure by heat flow differential scanning calorimetry. A linear relation suitably represented the temperature dependence of the C P of pure amines. The excess molar heat capacities, C P E , of the binary solutions were investigated, and the data were represented as function of temperature and composition using a Redlich–Kister-type equation. The C P of the ternary mixtures was correlated with temperature and amine concentration using the Sohnel and Novotny equation. Results showed that the calculated data agree very well with the experimental C P values at average absolute deviation values of 0.13%, 0.20, and 0.06 for the pure, binary, and ternary systems, respectively.