Evaluating cubic equations of state for calculation of vapor-liquid equilibrium of CO2 and CO2-mixtures for CO2 capture and storage processes
2009 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 86, no 6, 826-836 p.Article in journal (Refereed) Published
Proper solution of vapor liquid equilibrium (VLE) is essential to the design and operation of CO2 capture and storage system (CCS). According to the requirements of engineering applications, cubic equations of state (EOS) are preferable to predict VLE properties. This paper evaluates the reliabilities of five cubic EOSs, including PR, PT, RK, SRK and 3P1T for predicting VLE Of CO2 and binary CO2-mixtures containing CH4, H2S, SO2, Ar, N-2 or O-2, based on the comparisons with the collected experimental data. Results show that SRK is superior in the calculations about the saturated pressure of pure CO2; while for the VLE properties of binary CO2-mixtures, PR, PIT and SRK are generally superior to RK and 3P1T. The impacts of binary interaction parameter k(ij) were also analyzed. k(ij) has very clear effects on the calculating accuracy of an EOS in the property calculations Of CO2-mixtures. In order to improve the calculation accuracy, the binary interaction parameter was calibrated for all of the studied EOSs regarding every binary CO2-mixture.
Place, publisher, year, edition, pages
2009. Vol. 86, no 6, 826-836 p.
CO2 capture and storage, Vapor liquid equilibria, Cubic equation of, state, Binary interaction parameter, CO2 binary CO2-mixtures, carbon dioxide system, thermodynamic properties, co2-h2o-nacl systems, temperature relation, gaseous-mixtures, phase-equilibria, degrees c, pressures, methane, region
IdentifiersURN: urn:nbn:se:kth:diva-18302DOI: 10.1016/j.apenergy.2008.05.018ISI: 000264657300005ScopusID: 2-s2.0-60549097049OAI: oai:DiVA.org:kth-18302DiVA: diva2:336348
QC 201005252010-08-052010-08-052011-01-12Bibliographically approved