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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Phase equilibrium for methane, ethane and carbon dioxide hydrates at pressures up to 100 MPa through high-pressure microcalorimetry: Experimental data, analysis and modeling

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Author(s):
Sanches de Menezes, Davi Eber [1] ; Pessoa Filho, Pedro de Alcantara [1] ; Robustillo Fuentes, Maria Dolores [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Engn Sch, Dept Chem Engn, Av Prof Luciano Gualberto 380, BR-05508010 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Fluid Phase Equilibria; v. 518, n. SI AUG 15 2020.
Web of Science Citations: 0
Abstract

New experimental dissociation data for CH4, C2H6, and CO2 hydrates obtained by high-pressure microcalorimetry (HP-mu DSC) up to 100 MPa are presented. Deviations of onset, peak, and endset temperatures from predictions and their representativeness as equilibrium values are evaluated. For these systems, the onset temperatures provided good reproducibility and more accurate results than peak and endset temperatures, when compared to literature data. Predictions from CSMGem and Multiflash software packages are compared to the experimental results. Dynamic effects on gas hydrates formation are also evaluated by varying the water-sample size and the cooling-heating rate. Enthalpies of dissociation are determined by applying the Clapeyron equation, and new approaches are applied for the calculation of the hydrate volume and the hydration number estimation. The enthalpy of dissociation at conditions above the upper quadruple point is obtained for ethane and carbon dioxide hydrates for the first time. (C) 2020 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 17/01351-2 - Structural study of gas hydrates at high pressures
Grantee:Davi Éber Sanches de Menezes
Support type: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 15/23148-9 - Thermodynamic study on gas hydrate formation and dissociation
Grantee:Davi Éber Sanches de Menezes
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 14/02140-7 - Study on the formation and dissociation of gas hydrates
Grantee:Maria Dolores Robustillo Fuentes
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 14/25740-0 - Study on the formation and dissociation of gas hydrates at high pressure
Grantee:Maria Dolores Robustillo Fuentes
Support type: Scholarships in Brazil - Young Researchers