Viscosities, thermal conductivities and diffusion coefficients of CO(2) mixtures: Review of experimental data and theoretical models
2011 (English)In: International Journal of Greenhouse Gas Control, ISSN 1750-5836, Vol. 5, no 5, 1119-1139 p.Article, review/survey (Refereed) Published
Accurate experimental data on the thermo-physical properties of CO(2)-mixtures are pre-requisites for development of more accurate models and hence, more precise design of CO(2) capture and storage (CCS) processes. A literature survey was conducted on both the available experimental data and the theoretical models associated with the transport properties of CO(2)-mixtures within the operation windows of CCS. Gaps were identified between the available knowledge and requirements of the system design and operation. For the experimental gas-phase measurements, there are no available data about any transport properties of CO(2)/H(2)S, CO(2)/COS and CO(2)/NH(3); and except for CO(2)/H(2)O(/NaCl) and CO(2)/amine/H(2)O mixtures, there are no available measurements regarding the transport properties of any liquid-phase mixtures. In the prediction of gas-phase viscosities using Chapman-Enskog theory, deviations are typically <2% at atmospheric pressure and moderate temperatures. The deviations increase with increasing temperatures and pressures. Using both the Rigorous Kinetic Theory (RKT) and empirical models in the prediction of gas-phase thermal conductivities, typical deviations are 2.2-9%. Comparison of popular empirical models for estimation of gas-phase diffusion coefficients with newer experimental data for CO(2)/H(2)O shows deviations of up to 20%. For many mixtures relevant for CCS, the diffusion coefficient models based on the RKT show predictions within the experimental uncertainty. Typical reported deviations of the CO(2)/H(2)O system using empirical models are below 3% for the viscosity and the thermal conductivity and between 5 and 20% for the diffusion coefficients. The research community knows little about the effect of other impurities in liquid CO(2) than water, and this is an important area to focus in future work.
Place, publisher, year, edition, pages
2011. Vol. 5, no 5, 1119-1139 p.
CO(2)-mixtures, Transport properties, Viscosity, Thermal conductivity, Diffusion coefficient, CO(2) capture and storage
IdentifiersURN: urn:nbn:se:kth:diva-46862DOI: 10.1016/j.ijggc.2011.07.009ISI: 000295300700001ScopusID: 2-s2.0-80052538661OAI: oai:DiVA.org:kth-46862DiVA: diva2:454334
QC 201111072011-11-072011-11-072011-11-07Bibliographically approved