Interaction of Hydrocarbons with Clays under Reservoir Conditions: In Situ Infrared and Nuclear Magnetic Resonance Spectroscopy and X-ray Diffraction for Expandable Clays with Variably Wet Supercritical Methane
Journal Article
·
· ACS Earth and Space Chemistry
- ALFRED UNIVERSITY
- BATTELLE (PACIFIC NW LAB)
- Michigan State University
- MICHIGAN STATE UNIVERSITY
The results from novel in situ high-pressure nuclear magnetic resonance (NMR) spectroscopy, infrared (IR) spectroscopy, and X-ray diffraction (XRD) investigation of the interaction of the smectite hectorite with variably wet supercritical methane (scCH4) at 90 bar and 323 K (hydrostatic conditions equivalent to ~1 km depth) show that CH4 occurs in the clay interlayers, in pores external to the individual clay particles, and as bulk fluid. The occupancy of each environment depends on the relative humidity (RH) of the CH4-rich fluid and the hydration energy and size of the charge-balancing cation. As RH increases, the fraction of interlayer and interparticle CH4 decreases, although with Cs+, addition of a small amount of H2O initially increases CH4 uptake. Maximum interlayer CH4 adsorption occurs when the mean basal spacing just permits methane intercalation (~11.5 Å) and never below this basal spacing. It is also higher with divalent cations than with monovalent cations. The data show that CH4 adsorption occurs predominantly via a weak dispersion interaction with the clay and that its intercalation occurs via a passive space-filling hydrophobic mechanism. The results suggest that, under reservoir conditions, smectite interlayers may provide a reservoir for CH4 under low-water conditions.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1560148
- Report Number(s):
- PNNL-SA-136218
- Journal Information:
- ACS Earth and Space Chemistry, Journal Name: ACS Earth and Space Chemistry Journal Issue: 7 Vol. 2
- Country of Publication:
- United States
- Language:
- English
Understanding methane/carbon dioxide partitioning in clay nano- and meso-pores with constant reservoir composition molecular dynamics modeling
|
journal | January 2019 |
Similar Records
Interaction of Hydrocarbons with Clays under Reservoir Conditions: In Situ Infrared and Nuclear Magnetic Resonance Spectroscopy and X-ray Diffraction for Expandable Clays with Variably Wet Supercritical Methane
Influence of Smectite Structure and Hydration on Supercritical Methane Binding and Dynamics in Smectite Pores
Journal Article
·
Sun May 06 20:00:00 EDT 2018
· ACS Earth and Space Chemistry
·
OSTI ID:1543713
Influence of Smectite Structure and Hydration on Supercritical Methane Binding and Dynamics in Smectite Pores
Journal Article
·
Wed Dec 04 23:00:00 EST 2019
· Journal of Physical Chemistry C
·
OSTI ID:1578012