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Study on the formation and dissociation of gas hydrates

Abstract

The study and understanding of the mechanisms of gas hydrates formation anddissociation have applications in various areas such as flow assurance of oil and gas, waterpurification, capture and sequestration of CO2 and also in the possible use as an alternativeenergy source to other fuels such as oil or coal. However, there are many unknowns regardingtheir formation/dissociation -especially under extreme conditions of pressure andtemperature- interaction with the environment, and issues of representativeness andreproducibility of samples of hydrates obtained in different laboratories. Therefore, it isnecessary to study and understand the mechanisms of formation and dissociation of gashydrates at high pressures and develop new methodologies to obtain reliable thermodynamicand kinetic equilibrium data representing the behavior of gas hydrates present in nature, aswell as considering the main factors that can influence the process (water salinity, gascomposition, pressure and temperature conditions or presence of inhibitors, among others).The objective of this research is to establish a methodology based on high pressuredifferential scanning calorimetry to construct phase diagrams of gas hydrates, determine theirthermodynamic properties, investigate the formed solid phases and the kinetics offormation/dissociation of these compounds with or without additives. In addition, the kineticand thermodynamic models existing in the literature will be tested to determine theirlimitations, and if necessary other models will be developed. It is expected that the resultshave immediate relevance in transportation and energy storage, CO2 capture, environmentaland geological processes and flow assurance in pipelines of oil and gas. (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DOLORES ROBUSTILLO, MARIA; SANCHES DE MENEZES, DAVI EBER; PESSOA FILHO, PEDRO DE ALCANTARA. Experimental determination of dissociation temperatures and enthalpies of methane, ethane and carbon dioxide hydrates up to 90 MPa by using a multicycle calorimetric procedure. FUEL, v. 312, MAR 15 2022. Web of Science Citations: 0.
SANCHES DE MENEZES, DAVI EBER; PESSOA FILHO, PEDRO DE ALCANTARA; ROBUSTILLO FUENTES, MARIA DOLORES. Phase equilibrium for methane, ethane and carbon dioxide hydrates at pressures up to 100 MPa through high-pressure microcalorimetry: Experimental data, analysis and modeling. Fluid Phase Equilibria, v. 518, n. SI AUG 15 2020. Web of Science Citations: 0.
SANCHES DE MENEZES, DAVI EBER; PESSOA FILHO, PEDRO DE ALCANTARA; ROBUSTILLO FUENTES, MARIA DOLORES. Use of 1-butyl-3-methylimidazolium-based ionic liquids as methane hydrate inhibitors at high pressure conditions. Chemical Engineering Science, v. 212, FEB 2 2020. Web of Science Citations: 0.
SANCHES DE MENEZES, DAVI EBER; SUM, AMADEU K.; DESMEDT, ARNAUD; PESSOA FILHO, PEDRO DE ALCANTARA; ROBUSTILLO FUENTES, MARIA DOLORES. Coexistence of sI and sII in methane-propane hydrate former systems at high pressures. Chemical Engineering Science, v. 208, NOV 23 2019. Web of Science Citations: 3.
HEIDARYAN, EHSAN; ROBUSTILLO FUENTES, MARIA DOLORES; PESSOA FILHO, PEDRO DE ALCANTARA. Equilibrium of Methane and Carbon Dioxide Hydrates Below the Freezing Point of Water: Literature Review and Modeling. JOURNAL OF LOW TEMPERATURE PHYSICS, v. 194, n. 1-2, p. 27-45, JAN 2019. Web of Science Citations: 3.
SANCHES DE MENEZES, DAVI EBER; RALHA, THIAGO WALDOWSKI; MERCIER FRANCO, LUIS FERNANDO; PESSOA FILHO, PEDRO DE ALCANTARA; ROBUSTILLO FUENTES, MARIA DOLORES. SIMULATION AND EXPERIMENTAL STUDY OF METHANE-PROPANE HYDRATE DISSOCIATION BY HIGH PRESSURE DIFFERENTIAL SCANNING CALORIMETRY. Brazilian Journal of Chemical Engineering, v. 35, n. 2, p. 403-414, APR-JUN 2018. Web of Science Citations: 3.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.