An experimental study of gas hydrate formation of CH4-C3H8 binary mixture under the non-equilibrium conditions
Résumé
Gas hydrates are a crucial issue in many fields, from oil & gas industry, to carbon capture and
storage, air conditioning, or even planetary science. They also have an enormous potential as an
energy resource because of the tremendous quantity of methane trapped within them. To
understand better the gas hydrates phenomena, understanding of the thermodynamics and the
crystallization mechanisms of clathrate hydrates are required. The determination of the hydrate
composition and volume is also a technical challenge and we recall in the paper the method used
by our laboratory. In this work, several experiments were performed to obtain precious
experimental data and the gas compositions in hydrate phase. GasHyDyn group has recently
found out that the composition of gas hydrate is sensitive to the crystallization conditions. Hence
in this work, it was tried to understand better the relation between the composition of hydrate
during the crystallization and final state and crystallization rates. Experiments were performed in
a batch reactor and there were an online gas chromatography connected to the experimental setup
and an off-line ion-chromatography to measure the gas compositions and liquid compositions,
respectively. Based on these data and mass balance, the gas compositions in hydrate phase and
hydrate volume can be calculated. During the last decade, our GasHyDyn team has also
measured equilibrium data for many gas mixtures, and this document adds new data involving
propane. In the present work, the experimental results are discussed after formation following
two different experimental protocols: at quick and slow rates of crystallizations. It was observed
that, from the same initial conditions, the final pressure and water conversion for two different
procedures are slightly different.
Domaines
Génie des procédés
Origine : Fichiers produits par l'(les) auteur(s)
Format : Papier court
Origine : Fichiers produits par l'(les) auteur(s)
Commentaire : Résumé avec diagramme et références
Origine : Fichiers produits par l'(les) auteur(s)
Commentaire : Résumé avec diagramme et références