Post-combustion CO2 capture using ion-exchanged binder-free NaY zeolites

Aly, Ezzeldin; Zafanelli, Lucas F.A.S.; Henrique, Adriano; Silva, José A.C.; Silva. Francisco A.; Rodrigues, Alírio

http://hdl.handle.net/10198/30452

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Authors

Aly, Ezzeldin

Zafanelli, Lucas F.A.S.

Abstract(s)

Ion-exchange was performed on bare commercial binder-free NaY zeolite with al-kali (K+) and alkaline earth (Ca2+) metal cations in the range 23, 58, and 95% exchange for K+, and 56 and 71% for Ca2+, to be used as candidates regarding CO2 post-combustion capture (PCC) by adsorption processes. Adsorption equilibrium isotherms of CO2 and N2 were meas-ured on all these cation-exchanged samples using a chromatographic technique between 308 and 348 K and pressures up to 350 kPa and modelled by the dual-site Langmuir isotherm. The CO2 adsorption capacity increases as Na+ is exchanged further by K+ and the reverse for the Ca2+ ex-change. The single- and binary-component breakthrough curves were numerically simulated and accurately predicted using the Aspen Adsorption package. This work discloses the importance of ion-exchange on binder-free beads of NaY zeolite to improve its performance in PCC related applications.

Keywords

Adsorption processes Ion-exchange Post combustion capture Binder-free faujasite zeolites

URI

http://hdl.handle.net/10198/30452

Citation

Aly, Ezzeldin; Zafanelli, L.F.A.S; Henrique, Adriano; Freitas, Francisco; Rodrigues, A.E.(2023). Post-combustion CO2 capture using ion-exchanged binder-free NaY zeolites. In In 6th International Conference Wastes: Solutions, Treatments and Opportunities. Abingdon: CRC Press. p. 69-74. ISBN 978-1-032-38442-9