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Upgrade of Methane from Landfill Gas by Pressure Swing Adsorption
Abstract
This work focuses on the production of pipeline grade methane from landfill gas (LFG). Vacuum pressure swing adsorption technology using a kinetic adsorbent, Carbon Molecular Sieve 3K (Takeda), was employed for the separation of methane−carbon dioxide mixture. Adsorption equilibrium and kinetics of methane and carbon dioxide are reported at 298, 308, and 323 to model the adsorption-based process. A four-step Skarstrom-type cycle was employed comprising pressurization, feed, counter-current blowdown, and counter-current purge with product. Co-current pressurization with feed stream and counter-current pressurization with product were evaluated. The separation of a mixture of CH 4 (55%)−CO 2 (45%) was tested using two different four-step cycles: pressurization with feed stream, feed, blowdown, and purge with product and pressurization with product, feed, blowdown, and purge with product. The results indicate that purity of methane higher than 96% can be obtained with recovery higher than 75%. The difference of the performance in the non-adiabatic and adiabatic cases was also studied. It was observed that the temperature in the column increases allowing a faster and more important desorption of carbon dioxide in the blowdown step, retaining more CO 2 in the column and improving methane purity and recovery.
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Metadata
- Authors
- Cavenati, S., Grande, C. A., & Rodrigues, A. E.
- Venue
- Energy & Fuels
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-08-25
- Volume
- 19
- Issue
- 6
- Pages
- 2545-2555
- ISSN
- 0887-0624 (ISSN-L)
- 1520-5029
- OpenAlex
- W2066566477
- Cited by
- 182
- References
- 0
- FWCI
- 10.05
- Type
- journal article
- Language
- en
- Open access
- closed
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