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Adsorption of CO2, N2, and O2 on Natural Zeolites

Siriwardane, Ranjani V., Shen, Ming-Shing, Fisher, Edward P.·2003·Energy & Fuels

Abstract

Pressure swing adsorption (PSA) and temperature swing adsorption are potential techniques for removing CO 2 from high-pressure fuel gas streams. Natural zeolites are suitable candidate sorbents for use in the PSA process. Studies of volumetric gas adsorption of CO 2, N 2, and O 2 on three natural zeolites, with different major cations, were conducted at 25 °C up to a pressure of 300 psi (2 × 10 6 Pa). Preferential adsorption of CO 2 was observed with all three zeolites. The natural zeolite with the highest sodium content and highest surface area showed the highest CO 2 adsorption capacity. Competitive gas adsorption studies also showed that the zeolite with the highest sodium content gave the best separation of CO 2 from the gas mixtures. Contact time did not affect the extent of adsorption of the zeolites. Temperature-programmed desorption studies indicated that the majority of the physically adsorbed CO 2 was desorbed at room temperature, while some strongly bound CO 2 was desorbed at 115 °C.

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Metadata

Authors
Siriwardane, R. V., Shen, M.-S., & Fisher, E. P.
Venue
Energy & Fuels
Published
2003-03-19
Volume
17
Issue
3
Pages
571-576
ISSN
  • 0887-0624 (ISSN-L)
  • 1520-5029
OpenAlex
W2363661284
Cited by
211
References
0
FWCI
3.58
Type
journal article
Language
en
Open access
closed

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