HODSON, CATHERINE,ROBINIA (2019) Diffusion Equilibrium Times for Langmuir Isotherm Adsorption in Shale and Coalbed Methane Systems. Masters thesis, Durham University.
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Abstract
The ‘quasi-steady state’ (QSS) assumption is a commonly applied simplification to numerical dual porosity models. However, the assumption only becomes valid when concentration changes within the fractures are slow in
relation to the time required for diffusive equilibrium to occur within the matrix (Barker, 1991).
This thesis seeks to explore diffusion equilibrium times (DET) for gas diffusion with Langmuir isotherm adsorption by numerical solution and sensitivity analysis. A simple, heuristic function is derived, permitting rapid estimation of DET for individual cases. Four short case studies exploring application to shale gas and coalbed methane systems are presented.
| Item Type: | Thesis (Masters) |
|---|---|
| Award: | Master of Science |
| Faculty and Department: | Faculty of Science > Earth Sciences, Department of |
| Thesis Date: | 2019 |
| Copyright: | Copyright of this thesis is held by the author |
| Deposited On: | 21 May 2019 14:29 |
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