Temperature and pressure correlation for volume of gas hydrates with crystal structures sI and sII.

0465690 - ÚT 2017 CZ eng C - Konferenční příspěvek (zahraniční konf.)
Vinš, Václav - Jäger, A. - Hielscher, S. - Span, R. - Hrubý, Jan - Breitkopf, C.
Temperature and pressure correlation for volume of gas hydrates with crystal structures sI and sII.
Proceedings of the International conference Experimental Fluid Mechanics 2016. Liberec: Polypress s.r.o., 2016 - (Dančová, P.), s. 929-936
[Experimental Fluid Mechanics 2016. Mariánské Lázně (CZ), 15.11.2016-18.11.2016]
Grant CEP: GA ČR(CZ) GJ15-07129Y
Institucionální podpora: RVO:61388998
Klíčová slova: gas hydrates * modeling * volume correlation
Kód oboru RIV: BJ - Termodynamika

The temperature and pressure correlations for the volume of gas hydrates forming crystal structures sI and sII developed in previous study [Fluid Phase Equilib. 427 (2016) 268], focused on the modeling of pure gas hydrates relevant in CCS, were revised and modified for the modeling of mixed hydrates in this study. A universal reference state at temperature of 273.15 K and pressure of 1 Pa is used in the new correlation. Coefficients for the thermal expansion together with the reference lattice parameter were simultaneously correlated to both the temperature data and the pressure data for the lattice parameter. The new correlation is in good agreement with the experimental data over wide temperature and pressure ranges from 0 K to 293 K and from 0 to 2000 MPa, respectively. The new correlation provides significantly better agreement with the experimental data for sI hydrates compared to the original correlation. The results of both correlations are comparable in case of sII hydrates.
Trvalý link: http://hdl.handle.net/11104/0266669