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Phase equilibria with hydrate formation in H2O + CO2 mixtures modeled with reference equations of state

SYSNO ASEP	0386688
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Phase equilibria with hydrate formation in H2O + CO2 mixtures modeled with reference equations of state
Author(s)	Jäger, A. (DE) Vinš, Václav (UT-L)_{RID, ORCID} Gernert, J. (DE) Span, R. (DE) Hrubý, Jan (UT-L)_{RID, ORCID}
Source Title	Fluid Phase Equilibria. - : Elsevier - ISSN 0378-3812 Roč. 338, Januar (2013), s. 100-113
Number of pages	14 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	carbon dioxide ; gas hydrate ; modeling
Subject RIV	BJ - Thermodynamics
R&D Projects	GPP101/11/P046 GA ČR - Czech Science Foundation (CSF)
	GAP101/11/1593 GA ČR - Czech Science Foundation (CSF)
Institutional support	UT-L - RVO:61388998
UT WOS	000314737000012
DOI	10.1016/j.fluid.2012.10.017
Annotation	Formation of gas hydrates is an important feature of the water–carbon dioxide system. An accurate description of thermodynamic properties of this system requires a consistent description of both fluid and solid states and of their respective phase equilibria. In this study, we modified and refitted the gas hydrate model by A.L. Ballard and E.D. Sloan to combine it with highly accurate equations of state (EoS) in form of the Helmholtz energy and Gibbs energy for other phases formed in the water–carbon dioxide system, e.g., IAPWS-95 and IAPWS formulation for water ice Ih. Since the gas hydrate model uses the fugacity of the gas component in the coexisting phase as an input variable, the accuracy of the predicted phase equilibria was significantly improved by using highly accurate EoSs for coexisting phases. The new hydrate model can be used in a temperature range of 150–295 K and at pressures up to 500 MPa.
Workplace	Institute of Thermomechanics
Contact	Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823
Year of Publishing	2014

Number of the records: 1