Excess molar volumes for CO sub 2 -CH sub 4 -N sub 2 mixtures

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:5523911

Seitz, J C ^[1]; Blencoe, J G; Joyce, D B ^[2]; Bodnar, R J ^[3]

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1. Oak Ridge National Lab., TN (United States) Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Dept. of Geological Sciences
2. Oak Ridge National Lab., TN (United States)
3. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Dept. of Geological Sciences

Vibrating-tube densimetry experiments are being performed to determine the excess molar volumes of single-phase CO{sub 2}-CH{sub 4}-N{sub 2} gas mixtures at pressures as high as 3500 bars and temperatures up to 500{degrees}C. In our initial experiments, we determined the P-V-T properties of: (1) CO{sub 2}-CH{sub 4}, CO{sub 2}N{sub 2}, CH{sub 4}-N{sub 2}, and CO{sub 2}-CH{sub 4}-N{sub 2} mixtures at 1000 bars. 50 {degrees}C: and (2) CO{sub 2}-CH{sub 4} mixtures from 100 to 1000 bars at 100{degrees}C. Excess molar volumes in the binary subsystems are very accurately represented by two-parameter Margules equations. Experimentally determined excess molar volumes are in fair to poor agreement with predictions from published equations of state. Geometric projection techniques based on binary system data yield from published equations of state. Geometric projection techniques based on binary system data yield calculated excess molar volume for CO{sub 2}-CH{sub 4}-N{sub 2} mixtures that are in good agreement with our experimental data. 7 refs., 8 figs.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE; National Science Foundation (NSF); USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5523911
• Report Number(s): CONF-920761-7; ON: DE92010886; CNN: EAR-8857778-03PYI
• Resource Relation: Conference: 7. water-rock interaction conference, Park City, UT (United States), 9-23 Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
BINARY MIXTURES
MATHEMATICAL MODELS
HOMOGENEOUS MIXTURES
THERMODYNAMIC PROPERTIES
CARBON DIOXIDE
DENSIMETERS
EQUATIONS OF STATE
GEOCHEMISTRY
METHANE
NITROGEN
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
VOLUME
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
DISPERSIONS
ELEMENTS
EQUATIONS
HYDROCARBONS
MEASURING INSTRUMENTS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
400201* - Chemical & Physicochemical Properties
580000 - Geosciences