Adsorption characteristics of water vapor on ferroaluminophosphate for desalination cycle

Youngdeuk Kim, Kyaw Thu, Kim Choon Ng

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The adsorption characteristics of microporous ferroaluminophosphate adsorbent (FAM-Z01, Mitsubishi Plastics) are evaluated for possible application in adsorption desalination and cooling (AD) cycles. A particular interest is its water vapor uptake behavior at assorted adsorption temperatures and pressures whilst comparing them to the commercial silica gels of AD plants. The surface characteristics are first carried out using N2 gas adsorption followed by the water vapor uptake analysis for temperature ranging from 20°C to 80°C. We propose a hybrid isotherm model, composing of the Henry and the Sips isotherms, which can be integrated to satisfactorily fit the experimental data of water adsorption on the FAM-Z01. The hybrid model is selected to fit the unusual isotherm shapes, that is, a low adsorption in the initial section and followed by a rapid vapor uptake leading to a likely micropore volume filling by hydrogen bonding and cooperative interaction in micropores. It is shown that the equilibrium adsorption capacity of FAM-Z01 can be up to 5 folds higher than that of conventional silica gels. Owing to the quantum increase in the adsorbate uptake, the FAM-Z01 has the potential to significantly reduce the footprint of an existing AD plant for the same output capacity. © 2014 Elsevier B.V.
Original languageEnglish (US)
Pages (from-to)350-356
Number of pages7
JournalDesalination
Volume344
DOIs
StatePublished - Jul 2014

ASJC Scopus subject areas

  • Water Science and Technology
  • Materials Science(all)
  • Chemical Engineering(all)
  • Chemistry(all)
  • Mechanical Engineering

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