Thermodynamic study of clathrates hydrates from hydrocarbon gas mixtures Consequences for capture CO2 and flow assuranceReport as inadecuate




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* Corresponding author 1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels 2 PROPICE-ENSMSE - Département PROcédés Poudres, Interfaces, Cristallisation et Ecoulements 3 LGF-ENSMSE - UMR 5307 - Laboratoire Georges Friedel 4 HUMG - Hanoi University of Mining and Geology

Abstract : This work is a contribution to the global understanding of the coupling between kinetics and thermodynamics to explain the composition of the clathrate hydrates during their crystallization from an aqueous liquid and a hydrocarbon gas phase. In this work, we face new experimental facts that open questioning after comparing the classical modeling of clathrate hydrates following the approach of 1 with our experimental data following a new procedure allowing determining the hydrate composition during crystallization and at equilibrium. In this paper, we present details on the experimental procedure to measure the composition of the hydrate that crystallizes from a hydrocarbon gas mixture. We show that the results are time dependent and tend to thermodynamic equilibrium as time tends to infinity. An immediate consequence concerns two major domains of applications, CO2 capture from power plants, as well as flow assurance in the oil and gas industry. In fact, in both the cases, the crystallization is under non equilibrium conditions, and we conclude here that it necessarily leads to the formation of hydrates with a composition which is not predicted by classical modeling.

Keywords : Flow assurance Clathrates hydrates Thermodynamics CO2 capture





Author: Baptiste Bouillot - Quang-Du Le - Duyen Le Quang - Jean-Michel Herri -

Source: https://hal.archives-ouvertes.fr/



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