Excess molar volumes for CO{sub 2}-CH{sub 4}-N{sub 2} mixtures
- Oak Ridge National Lab., TN (United States)
- 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, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10136354
- Report Number(s):
- CONF-920761-7; ON: DE92010886; CNN: Grant: EAR-8857778-03PYI
- Resource Relation:
- Conference: 7. water-rock interaction conference,Park City, UT (United States),9-23 Jul 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
HOMOGENEOUS MIXTURES
THERMODYNAMIC PROPERTIES
BINARY MIXTURES
MATHEMATICAL MODELS
DENSIMETERS
CARBON DIOXIDE
METHANE
NITROGEN
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
VOLUME
EQUATIONS OF STATE
GEOCHEMISTRY
400201
580000
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
GEOSCIENCES