Polyvinyl alcohol as a viable membrane in artificial tissue design and development

Kadri, Nahrizul Adib; Raha, M. G.; Pingguan‐Murphy, Belinda

doi:10.1590/s1807-59322011000800031

Cited by 7 publications

(2 citation statements)

References 11 publications

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“…The modeling domain includes all the spatial components within the storage chamber: the sediment core, the fluids present (drilling and storage water), and the solid plastics present (the DST block, the plastic spacer, and the core liner) (Figure ). These solid plastics are modeled as porous media with different porosities, diffusivities, and permeabilities (Table ).…”

Section: Simulation Of Core Degradationmentioning

confidence: 99%

Dissolved Methane Diffusion Drives Hydrate-Bearing Pressure Core Degradation during Long-Term Storage in Water

You,

Thomas,

Savage

et al. 2024

Energy Fuels

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The UT-GOM2–1 Hydrate Pressure Coring Expedition collected methane hydrate-bearing sediments at in situ pressure from the deepwater Gulf of Mexico, Green Canyon Block 955 (GC 955), in 2017. These pressure cores were stored in methane-free fresh water at ∼24 MPa and 6 °C, well within the methane hydrate stability condition. X-ray images of these pressure cores showed varying degrees of reduction in the core diameter in 2019. In the storage water, dissolved methane concentration increased from fresh water to 78–95% of the methane solubility over 5 years. We show by comparing observations with 2D numerical simulations that pressure core degradation is driven by dissolved methane diffusion and methane hydrate dissolution. The degradation is controlled by two time scales. Initially, radial diffusion dominates as methane diffuses into the annulus. This process is fairly rapid and is on the time scale of tens of days. Thereafter, continued vertical diffusion occurs as methane diffuses upward into the overlying large volume of storage water. While methane hydrate is lost from the edge of the core, the inner core still contains methane hydrate at the original saturation. To improve future pressure core preservation, we suggest reducing the inner radius of the storage chamber, sealing the open end of the core liner, using methane-saturated storage water, and reducing the storage temperature.

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Section: Simulation Of Core Degradationmentioning

confidence: 99%

Dissolved Methane Diffusion Drives Hydrate-Bearing Pressure Core Degradation during Long-Term Storage in Water

You,

Thomas,

Savage

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Specifically several water vapor / PVA experiments were conducted as PVA is known to absorb water vapor and has been used extensively in water and vapor sensing [47][32], [48], [49]. In addition, PVA swelling mechanism and corresponding changes of volume and density as functions of relative humidity are well studied [50][51] [52].…”

Section: Diffusion and Fick's Lawmentioning

confidence: 99%