Effect of ion exchange on the adsorption of steam methane reforming off-gases on zeolite 13X

Filipe V.S. Lopes, Carlos A. Grande, Ana M. Ribeiro, Vítor J.P. Vilar, José M. Loureiro, Alírio E. Rodrigues

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

In this study, we have modified a material with enhanced adsorption capacity and kinetics toward nitrogen to apply in a layered pressure swing adsorption (PSA) unit for separation of steam methane reforming (SMR) off-gases. The adsorption properties of the base zeolite 13X (sodium form) were modified by changing the cation with lithium, barium, and calcium. The best adsorbent was selected by determining the difference in adsorption capacity measured by breakthrough experiments with (0.01 and 0.25) bar of partial pressure of nitrogen (effective capacity in a PSA unit) and the crystal diffusivity [at (303 and 323) K]. The ion exchange of zeolite 13X with Ba2+ and Ca 2+ will favor nitrogen adsorption, with the calcium-modified sample having better performance (higher adsorption capacity). Adsorption equilibrium and kinetics of N2, H2, CO, CH4, and CO 2 on ion-exchanged zeolite 13X-Ca were studied at (303 and 323) K in the pressure range (0 to 7) bar. At 1 bar of N2, the loading of the 13X-Ca was 0.447 mol · kg-1 against 0.288 mol · kg -1 of the original 13X-Na zeolite. © 2010 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)184-195
Number of pages12
JournalJournal of Chemical and Engineering Data
Volume55
Issue number1
DOIs
StatePublished - Jan 14 2010
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2022-09-13

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Chemistry

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