Experimentally determined volumetric properties of CO{sub 2} + CH{sub 4} + N{sub 2} mixtures at 20-100 MPa and 323-573 K. Chapter 3
The densities of C0{sub 2}+CH{sub 4}+N{sub 2} mixtures were measured at 20--100 MPa, 323--573 K using a custom-designed high-pressure, high-temperature vibrating-tube densimeter. Molar volumes and excess molar volumes (V{sub m}{sup E}) were calculated from the experimental data. Although (V{sub m}{sup E}) is generally positive, negative deviations are observed in ternary mixtures with compositions close to those of binary mixtures that exhibit negative deviations. (V{sub m}{sup E}) generally decreases as pressure increases from 20 to 100 MPa. As temperature increases, (V{sub m}{sup E}) increases until it reaches a maximum around 473 K, and then it decreases moderately as temperature is further increased. (V{sub m}{sup E}) is typically between 0 and 4 per cent of the total volume of the mixture. Predictions of (V{sub m}{sup E}) for ternary mixtures may be made from experimental data for the binary subsystems. Comparison with experimental data indicates that these methods are reasonably accurate for predicting the volumetric properties of ternary gas mixtures.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- National Science Foundation, Washington, DC (United States); USDOE, Washington, DC (United States); Oak Ridge Associated Universities, Inc., TN (United States)
- DOE Contract Number:
- AC05-76OR00033; AC05-84OR21400
- OSTI ID:
- 93670
- Report Number(s):
- CONF-940633-8; CONF-9205209-4; ON: DE95014988; CNN: NSF Grant EAR-8657778
- Resource Relation:
- Conference: 12. symposium on thermophysical properties, Boulder, CO (United States); Lake Arrowhead, CA (United States), 19-24 Jun 1994; 21-24 May 1992; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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