TY - JOUR
T1 - Compressed liquid densities for the (n-heptane + n-decane) and (n-octane + n-decane) systems from T = (313 to 363) K
AU - Quevedo-Nolasco, Rodolfo
AU - Galicia-Luna, Luis A.
AU - Elizalde-Solis, Octavio
N1 - Funding Information:
The authors thank the financial support of this research provided by Mexican Institutions: CONACyT and Instituto Politécnico Nacional .
PY - 2012/1
Y1 - 2012/1
N2 - Densities (p, ρ, T, x1) of two binary n-alkane systems are reported from T = (313 to 363) K in the compressed liquid phase up to 25 MPa over the whole range of composition. The binary mixtures {x1n-heptane + (1 - x1)n-decane} and {x1n-octane + (1 - x 1)n-decane} were prepared at compositions of (x1 = 0.0531, 0.2594, 0.5219, 0.777, 0.952), and (x1 = 0.0616, 0.2801, 0.5314, 0.7736, 0.9623), respectively. A measuring system based on a vibrating tube densimeter, DMA HPM from Anton Paar with data acquisition system was developed in order to obtain experimental densities. Water and nitrogen were used as reference fluids to calibrate the densimeter. Experimental methodology was checked by comparing the n-heptane and n-decane densities against multi-parameter equations proposed in the literature. Differences between both sets of data show a maximum deviation of 0.07%. Excess molar volumes, isothermal compressibility and isobaric thermal expansivity were computed from experimental densities.
AB - Densities (p, ρ, T, x1) of two binary n-alkane systems are reported from T = (313 to 363) K in the compressed liquid phase up to 25 MPa over the whole range of composition. The binary mixtures {x1n-heptane + (1 - x1)n-decane} and {x1n-octane + (1 - x 1)n-decane} were prepared at compositions of (x1 = 0.0531, 0.2594, 0.5219, 0.777, 0.952), and (x1 = 0.0616, 0.2801, 0.5314, 0.7736, 0.9623), respectively. A measuring system based on a vibrating tube densimeter, DMA HPM from Anton Paar with data acquisition system was developed in order to obtain experimental densities. Water and nitrogen were used as reference fluids to calibrate the densimeter. Experimental methodology was checked by comparing the n-heptane and n-decane densities against multi-parameter equations proposed in the literature. Differences between both sets of data show a maximum deviation of 0.07%. Excess molar volumes, isothermal compressibility and isobaric thermal expansivity were computed from experimental densities.
KW - Density
KW - Vibrating tube densimeter
KW - n-Decane
KW - n-Heptane
KW - n-Octane
UR - http://www.scopus.com/inward/record.url?scp=80053970462&partnerID=8YFLogxK
U2 - 10.1016/j.jct.2011.08.016
DO - 10.1016/j.jct.2011.08.016
M3 - Artículo
SN - 0021-9614
VL - 44
SP - 133
EP - 147
JO - The Journal of Chemical Thermodynamics
JF - The Journal of Chemical Thermodynamics
IS - 1
ER -