s: The working pairs of HFCs + organic absorption solvents are commonly used in absorption system. In this work, the vapor-liquid equilibrium (VLE) data of HFC-32 + DMETrEG and HFC-32 + NMP were measured at the temperature range of (293.15 ~ 343.15) K in a dual cycle experimental apparatus. The VLE data were correlated by PR+MHV1+NRTL model, and the experimental data had a good agreement with the correlated results. The average relative deviation of pressure for HFC-32 + DMETrEG was within 1.41 % and its maximum was 3.03 %, the average relative deviation of pressure for HFC-32+ NMP was within 1.43 % and its maximum was 3.25 %. The comparison of VLE characteristics for five binary mixtures (HFC-32 + DMETrEG, HFC-32 + NMP, HFC-32 + DMF, HFC-32 + DMAC, and HFC-32 + DMEDEG) was carried out. The compared results showed that the system pressures of HFC-32+DMETrEG and HFC-32+NMP were lower than other three mixtures, and the negative deviations from Raoult's law of HFC-32+DMETrEG and HFC-32+NMP were larger than the others, , which suggested that the two mixtures were more suitable as the working fluids for absorption system. Key word: vapor-liquid equilibrium; HFC-32; absorbent; activity coefficient
Compounds
#
Formula
Name
1
CH2F2
difluoromethane
2
C8H18O4
2,5,8,11-tetraoxadodecane
3
C5H9NO
N-methylpyrrolidone
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.