Molecular Modeling of Binary Liquid-Phase Adsorption of Aromatics in Silicalite

Shaji Chempath, Randall Q. Snurr*, John J. Low

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Adsorption in the zeolite silicalite from binary liquid mixtures of p-xylene, m-xylene, and toluene was investigated using grand canonical Monte Carlo (GCMC) simulations. The results obtained agree well with experimental excess adsorption isotherms from the literature. The agreement is very good when the zeolite is modeled using the PARA form of the silicalite structure, but the results obtained with the native ORTHO structure are in some cases even qualitatively wrong. This supports the previous suggestion that the structure of silicalite undergoes a transition from ORTHO to PARA upon adsorption of aromatic molecules. Molecular-level details of the energetics and siting within the zeolite provide insights into the macroscopic behavior. The simulated single-component and binary results were used to test ideal adsorbed solution theory for these systems.

Original languageEnglish (US)
Pages (from-to)463-469
Number of pages7
JournalAIChE Journal
Volume50
Issue number2
DOIs
StatePublished - Feb 1 2004

Keywords

  • GCMC
  • Liquid phase adsorption
  • Silicalite
  • Toluene
  • Xylene

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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