Thermal stability of CO2 hydrates in porous media with varying grain size in brine solution

Abstract. In the present work, heat transfer behavior of CO2 hydrate dissociation was studied in three quartz sand particles (QS-1, QS-2 and QS-3) with varying grain sizes. The evaluated by determining heating rates porous media (quartz sand) during process 3.3 wt.% NaCl. experiment performed using sandstone reactor first forming hydrates at 4 MPa 274.15 K then dissociating from to 277.15 K, respectively. results indicate that thermal response sediment significantly influenced as well properties. rate increased when size increased. However, presence reduced due endothermic nature dissociation. mainly depends on type pattern formed (pore-filling, load-bearing, cementation) location within pores sediment. pore-filling formation sediments provides high stability for storage its less contact particles. is challenged low or undesired capacity. These findings will provide meaningful insights select favorable properties/sites form sediments.