Modeling of CO2 vapor-liquid equilibrium in Colombian heavy oil using SARA analysis
The solubility of CO2 in Colombian heavy oil was calculated using the Peng-Robinson cubic equation of state and the Lee-Kesler correlations. The crude was represented as a mixture of pseudo-components and for each one of them, the thermodynamic and critical properties were estimated. The results obt...
- Autores:
-
Ramirez, Oscar
Betancur Gómez, Carolina
Hoyos, Bibian
Naranjo, Carlos
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2015
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/60698
- Acceso en línea:
- https://repositorio.unal.edu.co/handle/unal/60698
http://bdigital.unal.edu.co/59030/
- Palabra clave:
- 62 Ingeniería y operaciones afines / Engineering
Equation of state
pseudo-component
SARA analysis
crude
solvent
phase equilibrium.
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
| Summary: | The solubility of CO2 in Colombian heavy oil was calculated using the Peng-Robinson cubic equation of state and the Lee-Kesler correlations. The crude was represented as a mixture of pseudo-components and for each one of them, the thermodynamic and critical properties were estimated. The results obtained in representing the oil with four, five and six pseudo-components show that all these representations produce similar results and therefore the use of four pseudo-components is sufficient and has a lower computational cost. Excellent results were obtained by comparing the experimental and calculated data. For this system, it is enough to have a complete characterization of the SARA analysis and to use four pseudo-components to adequately model the vapor-liquid equilibrium of CO2 -heavy oil. |
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