Measurement and modelling of the vapor-liquid equilibrium of (CO2 + CO) at temperatures between (218.15 and 302.93) K at pressures up to 15 MPa
| Autor: | Saif Z.S. Al Ghafri, J. P. Martin Trusler, Lorena F.S. Souza |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Vapor pressure
0306 Physical Chemistry (Incl. Structural) Thermodynamics CO2 TRANSPORT 02 engineering and technology CARBON-DIOXIDE SYSTEM 010501 environmental sciences Flory–Huggins solution theory GASES Mole fraction 0915 Interdisciplinary Engineering 01 natural sciences REGION chemistry.chemical_compound 020401 chemical engineering PHASE-EQUILIBRIA Critical point (thermodynamics) TEMPERATURES Carbon capture transport and storage General Materials Science 0204 chemical engineering Physical and Theoretical Chemistry Carbon monoxide 0105 earth and related environmental sciences Science & Technology Chemistry Chemistry Physical Vapor-liquid equilibrium PRESSURES MIXTURES Chemical Engineering Thermodynamic model EQUATION-OF-STATE Atomic and Molecular Physics and Optics Carbon dioxide Physical Sciences Vapor–liquid equilibrium Phase behavior BEHAVIOR |
| Popis: | Precise knowledge of vapor–liquid equilibrium (VLE) data of (CO2 + diluent) mixtures is crucial in the design and operation of carbon capture, transportation and storage processes. VLE measurements of the (CO2 + CO) system are reported along seven isotherms at temperatures ranging from just above the triple-point temperature of CO2 to 302.93 K and at pressures from the vapor pressure of pure CO2 to approximately 15 MPa, including near-critical mixture states for all isotherms. The measurements are associated with estimated standard uncertainties of 0.006 K for temperature, 0.009 MPa for pressure and 0.011x(1 − x) for mole fraction x. The new VLE data have been compared with two thermodynamic models: the Peng-Robinson equation of state (PR-EOS) and a multi-fluid Helmholtz-energy equation of state known as EOS-CG. The PR-EOS was used with a single temperature-dependent binary interaction parameter, which was fitted to the experimental data. In contrast, EOS-CG was used in a purely-predictive mode with no parameters fitted to the present results. While PR-EOS generally agrees fairly well with the experimental data, EOS-CG showed significantly better agreement, especially close to the critical point. |
| Databáze: | OpenAIRE |
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