The Impact of Pore Size on Methane and CO2 Adsorption in Carbon
Abstract/Contents
- Abstract
- Methane adsorption in coal is an important factor in determining the feasibility of CO2 injection for enhanced coal bed methane (ECBM) recovery and sequestration or permanent storage of CO2 in coal. Methane and CO2 adsorb competitively and an understanding of each gas individually is important for determining a model to predict the feasibility of this as an abatement option. Coal has very heterogeneous porosity, with pores on the micro, meso, and macro-scales, and the pore size strongly affects the adsorption behavior. At a small enough pore size, both walls will influence the adsorption behavior of each gas molecule which will affect the adsorption characteristics of the material. To determine the size at which these effects become detectable and to determine the magnitude of this impact, we have used grand canonical monte carlo simulation to calculate the adsorption isotherms of methane as a precursor to comparison with CO2 across a range of pore sizes and at different temperature/pressure conditions. These isotherms have been calculated on graphite surfaces as an initial model to coal and the critical pore sizes and varying levels of impact have been calculated. The isotherms have been compared with experimental results to gauge accuracy and the behavior of the adsorbed layer has been examined in detail.
Description
| Type of resource | text |
|---|---|
| Date created | June 2011 |
Creators/Contributors
| Author | Mosher, Keith |
|---|---|
| Primary advisor | Wilcox, Jennifer |
| Degree granting institution | Stanford University, Department of Energy Resources Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Genre | Thesis |
Bibliographic information
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Preferred citation
- Preferred Citation
- Mosher, Keith. (2011). The Impact of Pore Size on Methane and CO2 Adsorption in Carbon. Stanford Digital Repository. Available at: https://purl.stanford.edu/jv666fy2208
Collection
Master's Theses, Doerr School of Sustainability
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