FN Archimer Export Format
PT J
TI Methane Hydrate Formation and Dissociation in Sand Media: Effect of Water Saturation, Gas Flowrate and Particle Size
BT 
AF BENMESBAH, Fatima
   RUFFINE, Livio
   Clain, Pascal
   Osswald, Véronique
   FANDINO TORRES, Olivia
   Fournaison, Laurence
   Delahaye, Anthony
AS 1:1,2;2:1;3:2,3;4:2;5:1;6:2;7:2;
FF 1:;2:PDG-REM-GM-LCG;3:;4:;5:PDG-REM-GM-LCG;6:;7:;
C1 Unité Géosciences Marines, Laboratoire Cycles Géochimiques (LCG), IFREMER, F-29280 Plouzané, France
   INRAE, FRISE, Université Paris-Saclay, 92761 Antony, France
   Research Center, Léonard de Vinci Pôle Universitaire, 92916 Paris, France
C2 IFREMER, FRANCE
   INRAE, FRANCE
   DVRC, FRANCE
SI BREST
SE PDG-REM-GM-LCG
IN WOS Ifremer UPR
   DOAJ
   copubli-france
   copubli-p187
IF 1.13
TC 14
UR https://archimer.ifremer.fr/doc/00654/76593/77741.pdf
   https://archimer.ifremer.fr/doc/00654/76593/77742.pdf
LA English
DT Article
DE ;gas hydrate;porous media;kinetics;methane storage estimate;water saturation;gas flowrate;particle size
AB Assessing the influence of key parameters governing the formation of hydrates and determining the capacity of the latter to store gaseous molecules is needed to improve our understanding of the role of natural gas hydrates in the oceanic methane cycle. Such knowledge will also support the development of new industrial processes and technologies such as those related to thermal energy storage. In this study, high-pressure laboratory methane hydrate formation and dissociation experiments were carried out in a sandy matrix at a temperature around 276.65 K. Methane was continuously injected at constant flowrate to allow hydrate formation over the course of the injection step. The influence of water saturation, methane injection flowrate and particle size on hydrate formation kinetics and methane storage capacity were investigated. Six water saturations (10.8%, 21.6%, 33%, 43.9%, 55% and 66.3%), three gas flowrates (29, 58 and 78 mLn·min−1) and three classes of particle size (80–140, 315–450 and 80–450 µm) were tested, and the resulting data were tabulated. Overall, the measured induction time obtained at 53–57% water saturation has an average value of 58 ± 14 min minutes with clear discrepancies that express the stochastic nature of hydrate nucleation, and/or results from the heterogeneity in the porosity and permeability fields of the sandy core due to heterogeneous particles. Besides, the results emphasize a clear link between the gas injection flowrate and the induction time whatever the particle size and water saturation. An increase in the gas flowrate from 29 to 78 mLn·min−1 is accompanied by a decrease in the induction time up to ~100 min (i.e., ~77% decrease). However, such clear behaviour is less conspicuous when varying either the particle size or the water saturation. Likewise, the volume of hydrate-bound methane increases with increasing water saturation. This study showed that water is not totally converted into hydrates and most of the calculated conversion ratios are around 74–84%, with the lowest value of 49.5% conversion at 54% of water saturation and the highest values of 97.8% for the lowest water saturation (10.8%). Comparison with similar experiments in the literature is also carried out herein. 
PY 2020
PD OCT
SO Energies
SN 1996-1073
PU MDPI
VL 13
IS 19
UT 000586744700001
DI 10.3390/en13195200
ID 76593
ER

EF