Three-phase liquid-liquid-vapor behavior in multicomponent liquefied natural gas mixtures

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5513783

Llave, F M

The three-phase L/sub 1/-L/sub 2/-V equilibria behavior of gas mixtures involving binary, ternary and quaternary components were investigated. A total of three binary systems, six ternary systems and one quaternary system were experimentally studied to define the thermodynamic conditions that would promote the multiphase behavior. The temperature ranged from 116/sup 0/K to about 224/sup 0/K. Major concern in the study is the establishment of the boundaries of the multiphase region, thus providing information on pressure, temperature, composition as well as molar volume information regarding the occurrence of the three-phase L/sub 1/-L/sub 2/-V behavior. The results are presented in both graphical and tabular form. The graphical representations are rendered as pressure-temperature projections in the thermodynamic phase space as well as schematics of the topography of the phase behavior. Common to all higher order systems are the critical boundaries of the three-phase region. An attempt to provide a correlation of the multiphase behavior of the binary and ternary order systems studied is also investigated. The Peng-Robinson equation of state is used in defining the mixture properties and a modified-false position method is developed as the algorithm for establishing the thermodynamic equilibrium conditions. The order of magnitude of the interaction parameters of the components are determined and the applicability of using two-constant cubic equation of state is shown in the results for the binary systems. The results for the binary studied are tested by determining the correlation of a multiphase ternary system. Acceptable correlation was made for the binary level and partial success was achieved in the attempt at the ternary level.

• Research Organization: Notre Dame Univ., IN (USA)
• OSTI ID: 5513783
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030400 -- Natural Gas-- Products & By-Products
033000* -- Natural Gas-- Properties & Composition
DATA
ENERGY SOURCES
EQUATIONS
EQUATIONS OF STATE
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GRAPHS
INFORMATION
LIQUEFIED GASES
LIQUEFIED NATURAL GAS
MULTIPHASE FLOW
NATURAL GAS
PHASE STUDIES
PHYSICAL PROPERTIES
TABLES
THERMODYNAMIC PROPERTIES