A new modification on RK EOS for gaseous CO2 and gaseous mixtures of CO2 and H2O
2006 (English)In: International journal of energy research (Print), ISSN 0363-907X, E-ISSN 1099-114X, Vol. 30, no 3, 135-148 p.Article in journal (Refereed) Published
To develop an equation of state with simple structure and reasonable accuracy for engineering application, Redlich-Kwong equation of state was modified for gaseous CO2 and CO2-H2O mixtures. In the new modification, parameter 'a' of gaseous CO2 was regressed as a function of temperature and pressure from recent reliable experimental data in the range: 220-750 K and 0.1-400 MPa. Moreover, a new mixing rule was proposed for gaseous CO2-H2O mixtures. To verify the accuracy of the new modification, densities were calculated and compared with experimental data. The average error is 1.68% for gaseous CO2 and 0.93% for gaseous mixtures of CO2 and H2O, Other thermodynamic properties, such as enthalpy and heat capacities of CO2 and excess enthalpy of gaseous CO2-H2O mixtures, were also calculated; results fit experimental data well, except for the critical region.
Place, publisher, year, edition, pages
2006. Vol. 30, no 3, 135-148 p.
CO2; H2O; mixtures; equation of state; mixing rule; thermodynamic properties
IdentifiersURN: urn:nbn:se:kth:diva-9107DOI: 10.1002/er.1129ISI: 000235413200001ScopusID: 2-s2.0-32544461118OAI: oai:DiVA.org:kth-9107DiVA: diva2:15030
QC 201008192009-11-122008-09-192010-08-19Bibliographically approved