Number of the records: 1
Temperature and pressure correlation for volume of gas hydrates with crystal structures sI and sII
- 1.
SYSNO ASEP 0474769 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Temperature and pressure correlation for volume of gas hydrates with crystal structures sI and sII Author(s) Vinš, Václav (UT-L) RID, ORCID
Jäger, A. (DE)
Hielscher, S. (DE)
Span, R. (DE)
Hrubý, Jan (UT-L) RID, ORCID
Breitkopf, C. (DE)Number of authors 6 Article number 02141 Source Title EPJ Web of Conferences, EXPERIMENTAL FLUID MECHANICS 2016 (EFM16 ), 143. - CEDEX : E D P SCIENCES, 2017 - ISSN 2100-014X Number of pages 8 s. Publication form Online - E Action Experimental Fluid Mechanics 2016 Event date 15.11.2016 - 18.11.2016 VEvent location Mariánské Lázně Country CZ - Czech Republic Event type WRD Language eng - English Country FR - France Keywords gas hydrates ; modeling ; volume corelation Subject RIV BJ - Thermodynamics OECD category Thermodynamics R&D Projects GJ15-07129Y GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 UT WOS 000407743800143 EID SCOPUS 85020111440 DOI 10.1051/epjconf/201714302141 Annotation 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) 268-281], focused on the modeling of pure gas hydrates relevant in CCS (carbon capture and storage), 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. A two-stage Levenberg Marquardt algorithm was employed for the parameter optimization. The pressure dependence described in terms of the bulk modulus remained unchanged compared to the original study. A constant value for the bulk modulus B0 = 10 GPa was employed for all selected hydrate formers. 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. Compared to the original correlation used for the modeling of pure gas hydrates the new correlation provides significantly better agreement with the experimental data for sI hydrates. The results of the new correlation are comparable to the results of the old correlation in case of sII hydrates. In addition, the new correlation is suitable for modeling of mixed hydrates. 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 2018 Electronic address https://www.epj-conferences.org/articles/epjconf/abs/2017/12/epjconf_efm2017_02141/epjconf_efm2017_02141.html
Number of the records: 1