Propane/propylene separation by simulated moving bed II. Measurement and prediction of binary adsorption equilibria of propane propylene, isobutane, and 1-butene on 13X zeolite

Nabil Lamia, Miguel A. Granato, Pedro S.Á Gomes, Carlos A. Grande, Luc Wolff, Philibert Leflaive, Damien Leinekugel-le-Cocq, Alírio E. Rodrigues

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The design of a simulated moving bed (SMB) process relies on valid thermodynamic predictions of multicomponent adsorption built up from accurate binary adsorption equilibrium data. Experimental adsorption equilibria of binary mixtures constituted by propane, propylene, isobutane and 1-butene on 13X zeolite were determined using breakthrough experiments at 373 K and 150 kPa. In addition, these binary adsorption experiments allow to confirm the choice of isobutane as an interesting desorbent for the separation of propane-propylene by SMB, since it has an intermediate selectivity between the two species to separate. Various prediction models are available in the literature but only a few of them have both physical and thermodynamical consistency. The ideal adsorbed solution theory (IAST), the thermodynamically consistent extended Toth model (TCET), and the physically-consistent extended Toth isotherm (PCET) were used to predict binary adsorption equilibria from pure component adsorption isotherms parameters. The PCET model was found suitable for representing the adsorption equilibrium of the different hydrocarbon mixtures with a reasonably good accuracy.
Original languageEnglish (US)
Pages (from-to)1485-1509
Number of pages25
JournalSeparation Science and Technology
Volume44
Issue number7
DOIs
StatePublished - May 1 2009
Externally publishedYes

ASJC Scopus subject areas

  • Filtration and Separation
  • Chemical Engineering(all)
  • Chemistry(all)
  • Process Chemistry and Technology

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