Vapor-liquid equilibrium of aromatic oil from coal hydrogasification

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5380013

Srinivasan, R

The need for appropriate phase equilibrium data in the design of emerging coal conversion technology and particularly for the coal hydrogasification process has been the primary reason for the initiation of this project. A recirculation type vapor-liquid equilibrium (VLE) apparatus has been constructed for obtaining phase equilibrium data for complex hydrocarbon mixtures at high pressures and temperatures. A specially designed value has been used for obtaining equilibrium phase samples. The performance of the apparatus was tested for attainment of equilibrium in comparison with published data on VLE and N/sub 2/-n-decane systems. A systematic and complete VLE data for Ch/sub 4/-aromatic oil and H/sub 2/-aromatic oil systems, for pressures in the range of 20 to 110 atm and temperatures in the range of 400 to 550 K is presented. The multicomponent aromatic oil is a simulated light oil from coal hydrogasification without the presence of any highly polar components. Correlations for the estimation of hypothetical liquid phase pure component fugacities of hydrogen and methane, based on binary hydrocarbon VLE data, are presented. The correlations are to be used in conjunction with (1) the Prausnitz-Chueh modification of the Redlich-Kwong equation state for estimation of the vapor phase fugacity coefficients; (2) a slightly modified regular solution theory for estimation of activity coefficients and (3) the Lee-Edmister correlation for estimation of pure component hydrocarbon liquid phase fugacities at subcritical conditions. The methodology presented here has been tested for the computation of the VLE of a few ternary and quaternary systems at high pressures and temperatures with fair success. The technique presented here offers a viable means of estimation of high pressure and temperature VLE of complex hydrocarbon systems.

• OSTI ID: 5380013
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
AROMATICS
CHEMICAL REACTIONS
COAL GASIFICATION
CORRELATIONS
DESIGN
ELEMENTS
EQUIPMENT
FLUIDS
GASES
GASIFICATION
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
HYDROGENATION
LIQUIDS
MEDIUM PRESSURE
METHANE
NONMETALS
ORGANIC COMPOUNDS
PERFORMANCE
PHASE STUDIES
THERMOCHEMICAL PROCESSES
VAPORS