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A new modification on RK EOS for gaseous CO2 and gaseous mixtures of CO2 and H2O
Royal Institute of Technology.
Kungliga tekniska högskolan, KTH.
2006 (English)In: International journal of energy research (Print), ISSN 0363-907X, E-ISSN 1099-114X, Vol. 30, p. 135-148Article in journal (Refereed) Published
Abstract [en]

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, p. 135-148
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-10494DOI: 10.1002/er.1129Local ID: 94ec35a0-0d70-11de-9d3e-000ea68e967bOAI: oai:DiVA.org:ltu-10494DiVA, id: diva2:983439
Note
Upprättat; 2006; 20090310 (xiajix)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Ji, XiaoyanYan, Jinyue

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