Effect of Ion Exchanged to the CO2 Adsorption on MFI Zeolites


Sang Kompiang Wirawan(1*), I Wayan Warmada(2), Endang Tri Wahyuni(3)

(1) Department of Chemical Engineering, Faculty of Engineering, Gadjah Mada University, 55281 Yogyakarta, Indonesia
(2) Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta,Indonesia
(3) Department of Chemistry, Faculty of Mathematical and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(*) Corresponding Author


The adsorption of CO2 on MFI (HZSM-5) and ion exchanged MFI (CaZSM-5) zeolites were studied by a temperature programmed desorption (TPD). The adsorption measurements were conducted at temperatures from 323 to 473 K at atmospheric pressure. The results showed that CO2 was adsorbed on HZSM-5 by one type of adsorption, and on CaZSM-5 zeolites by at least two types of adsorption over the temperature range studied. One was a weak adsorption probably due to interaction with the framework of ZSM-5, and the other was a stronger adsorption caused by interactions with the Ca cations of ZSM-5. The adsorption behavior for HZSM-5 was described by a single site Langmuir adsorption model but for CaZSM-5 a dual site Langmuir model was used. The TPD results indicated that the quantity of irreversibly adsorbed CO2 on HZSM-5 was undetectable.


CO2 adsorption; ZSM-5; Step change response; Langmuir adsorption model; FTIR spectra

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DOI: https://doi.org/10.22146/ajche.49733

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ASEAN Journal of Chemical Engineering  (print ISSN 1655-4418; online ISSN 2655-5409) is published by Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada.