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Surface tension of binary mixtures including polar components modeled by the density gradient theory combined with the PC-SAFT equation of state
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SYSNO ASEP 0368150 Druh ASEP O - Ostatní výsledky Zařazení RIV Záznam nebyl označen do RIV Název Surface tension of binary mixtures including polar components modeled by the density gradient theory combined with the PC-SAFT equation of state Tvůrce(i) Vinš, Václav (UT-L) RID, ORCID
Hrubý, Jan (UT-L) RID, ORCID
Planková, Barbora (UT-L) RIDRok vydání 2011 Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova density gradient theory ; polar fluids ; SAFT equation of state Vědní obor RIV BJ - Termodynamika CEP GAP101/11/1593 GA ČR - Grantová agentura ČR IAA200760905 GA AV ČR - Akademie věd GPP101/11/P046 GA ČR - Grantová agentura ČR CEZ AV0Z20760514 - UT-L (2005-2011) Anotace In this study, we use the Cahn-Hilliard density Gradient Theory (GT) for predicting the surface tension of various binary mixtures at relatively wide temperature ranges. The GT was combined with a physically based equation of state (EoS), namely the Perturbed-Chain (PC) Statistical Associating Fluid Theory (SAFT). In our study we focus on binary mixtures with polar components. The original PC-SAFT EoS was therefore extended with a polar term in the expression for the residual Helmholtz free energy in the manner proposed by Gross. The Perturbed-Chain Polar (PCP) SAFT EoS provides more accurate results for both the quadrupolar and dipolar substances than the original PC-SAFT EoS. Besides the planar phase interface used for the surface tension prediction, the GT combined with the PCP-SAFT EoS was applied also on the spherical phase interface. The GT allows solving the critical cluster size occurring during the nucleation of droplets. Application of the PCP-SAFT EoS provides significant improvement compared to classical cubic Peng-Robinson EoS used in the previous study. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2012
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