Mechanisms of methane hydrate crystallization in a semibatch reactor - Influence of a kinetic inhibitor: Polyvinylpyrrolidone

• Published in: Annals of the New York Academy of Sciences
• Main Authors: Pic, Jean-Stéphane, Herri, Jean-Michel, Cournil, 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), 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), Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation (GENERIC-ENSMSE), Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-SPIN
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2000
• Subjects: Methane; crystallization; [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering; Methane hydrate
• Online Access: https://hal-emse.ccsd.cnrs.fr/emse-00497127; https://doi.org/10.1111/j.1749-6632.2000.tb06811.x

International audience In a previous paper,(1) we proposed a complete model for methane hydrate crystallization from pure water and methane gas in a semibatch reactor. This model takes into account the crucial importance of the rate-determining mass transfer at the gas/liquid interface, coupled with primary nucleation and growth. The validity of this model has been proved on a large number of experimental results. However, due to the complexity of the equations, only a numerical solution is possible, so that comparison between theory and experiment is not straightforward. In this paper, we consider a simple model of primary nucleation/growth and we propose an analytical solution for the time evolution of the total number of particles, mean diameter, and methane gas consumption rate during the first time of the crystallization. This model is used to analyze experimental results obtained in the presence of a kinetic additive: polyvinylpyrrolidone (PVP), in order to understand the origin of its effect.