Van der Waals interactions in systems involving gas hydrates.

• Published in: Fluid Phase Equilibria
• Main Authors: Bonnefoy, Olivier, Gruy, Frédéric, Herri, Jean-Michel
• Other Authors: Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT), Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation (GENERIC-ENSMSE), Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-SPIN, Laboratoire des Procédés en Milieux Granulaires (LPMG-EMSE), Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2005
• Subjects: Methane gas hydrate; Hamaker constant; Agglomeration; Dielectric response function; Van der Waals interaction potential; [SPI.OTHER]Engineering Sciences [physics]/Other; Methane hydrate
• Online Access: https://hal.science/hal-00125056; https://hal.science/hal-00125056/document; https://hal.science/hal-00125056/file/OB-FluidPhaseEq.pdf; https://doi.org/10.1016/j.fluid.2005.02.004

33 pages International audience The goal of this work is to quantify the Van der Waals interactions in systems involving gas hydrates. Gas hydrates are crystalline compounds that are often encountered in oil and gas industry, where they pose problems (pipeline plugging, .) and represent opportunities (energy resources, gas transport, . . . ). We focus on methane hydrate, which is the most common one, and calculate its Hamaker constant. Two methods are used and lead to results in good agreement. The Hamaker, microscopic, approach gives a first estimate of the Hamaker constant of 4.59×10−21 J for the hydrate-water-hydrate system. The Lifshitz, macroscopic, method used in combination with the Kramers-Kronig relationship gives a value of 8.25 × 10−21 J. The Hamaker constant is also computed for three phases systems (gas hydrate clathrate and liquid water with ice, dodecane, quartz, sapphire, teflon, metals). The interaction potential in different geometrical configurations is then calculated by a hybrid method and various cases of practical interest are studied.