Fixed bed adsorption dynamics of CO2/CH4 mixtures in zeolite 13X for biogas upgrading

Silva, José A.C.; Rodrigues, Alírio

http://hdl.handle.net/10198/14292

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Authors

Silva, José A.C.

Rodrigues, Alírio

Abstract(s)

The separation performance of CO2/CH4 mixtures in binderless beads of zeolite 13X has been studied in a fixed bed adsorption system for biogas upgrading strategies to bio-methane. Zeolite 13X proved to be very efficient for the separation leading to breakthrough curves that show a plateau of pure CH4 of approximately 4 minutes depending of the operating conditions chosen. The separation performance for CO2/CH4 measured by the selectivities range from 37 at a low pressure of 0.1 MPa to approximately 5.0 at the high temperature of 423 K. A mathematical model for fixed bed adsorption studies was used and validated through the experimental data predicting with good accuracy the behavior of the transient breakthrough experiments being a valuable tool for the analysis and design of cyclic adsorption processes (PSA) for biogas upgrading strategies to biomethane and CO2 capture using 13X zeolite.

Keywords

Biogas upgrading CO2 sequeatration

URI

http://hdl.handle.net/10198/14292

Citation

Silva, José A.S.; Rodrigues, A.E. (2015). Fixed bed adsorption dynamics of CO2/CH4 mixtures in zeolite 13X for biogas upgrading. In Vilarinho, Cândida; Castro, Fernando; Russo, Mário (eds.) 3rd International Conference on Wastes: Solutions, Treatments and Opportunities, Wastes 2015; Viana do Castelo. p. 317-322. ISBN 978-1-138-02882-1