Thermodynamics of liquid mixtures

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7035462

Toghiani-Doulatabadi, H

In designing separation equipment, an understanding of phase equilibria and the ability to analytically interpret experimental vapor-liquid equilibrium data are extremely important. Additionally, a systematic study of binary systems of chemicals from different homologous series could increase understanding of group contribution methods and allow prediction of phase equilibria for more complicated systems. As an extension of the coal-based chemicals research carried out by the Thermodynamics Research Group at the University of Missouri-Columbia, it was undertaken to study vapor-liquid equilibria for the binary systems methanol-benzene and methanol-thiophene. Methanol exhibits association in its pure form and so these binary systems are highly non-ideal. Prediction of vapor-liquid equilibria for these systems using a single equation of state provides a severe test of the capabilities of such an analytic equation of state. A modified Swietoslawski ebulliometer of the recirculating type with continuous flow of both liquid and vapor phases was constructed. Vapor pressure data for all three pure components were measured. Both isobaric and isothermal vapor-liquid equilibrium data were obtained for each binary system. The data were subjected to thermodynamic consistency tests and then rigorously analyzed using the maximum likelihood technique. The data were also analyzed using a single equation of state developed in the present work. This equation of state is valid for both polar and apolar substances and is capable of quantitative prediction of properties for both liquid and vapor phases of a pure substance.

• Research Organization: Missouri Univ., Columbia, MO (USA)
• OSTI ID: 7035462
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ALCOHOLS
AROMATICS
BENZENE
BINARY MIXTURES
COAL LIQUIDS
DESIGN
DISPERSIONS
EQUATIONS
EQUATIONS OF STATE
EQUILIBRIUM
FLUIDS
GASES
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
LIQUIDS
MEASURING INSTRUMENTS
METHANOL
MIXTURES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
SEPARATION EQUIPMENT
THERMODYNAMIC PROPERTIES
THIOPHENE
VAPOR PRESSURE