Journal
CHEMICAL ENGINEERING JOURNAL
Volume 405, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.126955
Keywords
Mesoporous silica; Methane hydrate; Confinement; Wettability
Categories
Funding
- Alexander von Humboldt foundation
- Agencia Nacional de Investigacion e Innovacion [PD_NAC_2018_1_150145]
- Federal Ministry of Education and Research (Bundesministerium fur Bildung und Forschung, BMBF) [03SF0498]
- Daimler und Benz-Stiftung [32-01/16]
- Helmholtz-Zentrum Berlin
Ask authors/readers for more resources
The study investigated methane hydrate formation process in confinement through high-pressure methane sorption experiments on two wet materials with similar pore size distributions, B-PMO (hydrophobic) and MCM-41 (hydrophilic). The results showed that external water and 'core water' inside the pore were rapidly consumed in the first step to form bulk-like hydrate, while adsorbed water was slowly consumed in the second step to form less stable confined hydrates.
The methane hydrate (MH) formation process in confinement was investigated using high-pressure methane sorption experiments on two wet materials with similar pore size distributions, B - PMO (hydrophobic) and MCM - 41 (hydrophilic). Their methane sorption isotherms possess two discrete methane gas consumption steps at similar to 10 bar and similar to 30 bar at 243 K. A systematic analysis reveals that external water and the so-called 'core water' inside the pore is rapidly consumed in the first step to form bulk-like hydrate, whereas adsorbed water is slowly consumed in the second step to form less stable confined hydrates at higher pressures. Synchrotron powder XRay results confirm methane hydrate structure I and reveal that bulk ice is swiftly and fully converted to hydrate in MCM - 41, whereas inactive bulk ice co-exists with MH in B - PMO at 6 MPa demonstrating the huge impact of the surface wettability on the water's behavior during MH formation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available