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U.S. Department of Energy
Office of Scientific and Technical Information

Molecular theory and computer-simulation studies of natural and synthetic gas mixtures. Annual report, January-December 31, 1990

Technical Report ·
OSTI ID:6957572
The effect of molecular associations on the phase equilibria of fluids with multiple bonding sites is investigated. The individual molecules are represented by a chain of fused spheres with off-center, square-well attractive sites. Such a system's thermodynamic properties can be calculated by using expressions based on a cluster expansion theory. Comparison with experimental data has been made for several pure fluids of associating molecules, including acetone, methanol, ethanol, and nitric oxide. The results are excellent. Such comparisons have also been made for alkane-alcohol mixtures. Results for phase equilibria, heats of mixing, and heat capacities show quite good agreement for the shorter chain molecules (up to C6 or C8) but become poorer for longer chain lengths. Molecular dynamics simulations have been carried out to study the kinetics of H-bond formation and breaking for alcohols. The work is continuing.
Research Organization:
Cornell Univ., Ithaca, NY (United States). School of Chemical Engineering
OSTI ID:
6957572
Report Number(s):
PB-92-235696/XAB; CNN: GRI-5087-260-1452
Country of Publication:
United States
Language:
English