Ethanol/water transport through silicalite membranes

Mikihiro Nomura, Takeo Yamaguchi, Sin Ichi Nakao

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

Transport mechanism of ethanol/water mixtures by pervaporation and vapor permeation through silicalite membrane was investigated. The activities of both ethanol and water in feed were controlled independently by vapor permeation to study the feed composition effects quantitatively. Also, adsorption experiments of single component and binary mixtures were carried out to measure the adsorbed mixture composition in the silicalite membrane. Ethanol permeance was independent of water concentration in feed. Water permeance, however, seriously decreased by the presence of ethanol in feed, and water permeation was restricted by ethanol. The adsorption-diffusion model was considered for the transport mechanism through the silicalite membrane. Ethanol selectively adsorbed to silicalite membrane from ethanol/water vapor. The diffusion coefficients of water and ethanol were calculated based on the adsorption-diffusion model, and the results showed almost the same diffusivity between the single component and mixture feed case. Thus, high ethanol selective permeation through the silicalite membrane was explained by the ethanol selective adsorption to the silicalite membrane.

Original languageEnglish
Pages (from-to)161-171
Number of pages11
JournalJournal of Membrane Science
Volume144
Issue number1-2
DOIs
Publication statusPublished - 1998 Jun 10
Externally publishedYes

Fingerprint

Ethanol
ethyl alcohol
membranes
Membranes
Water
water
Permeation
Adsorption
adsorption
Vapors
Composition effects
vapors
Pervaporation
Steam
Binary mixtures
Water vapor
binary mixtures
diffusivity
water vapor
diffusion coefficient

Keywords

  • Adsorption
  • Ethanol/water
  • Silicalite membranes
  • Transport phenomena

ASJC Scopus subject areas

  • Filtration and Separation
  • Polymers and Plastics

Cite this

Ethanol/water transport through silicalite membranes. / Nomura, Mikihiro; Yamaguchi, Takeo; Nakao, Sin Ichi.

In: Journal of Membrane Science, Vol. 144, No. 1-2, 10.06.1998, p. 161-171.

Research output: Contribution to journalArticle

Nomura, Mikihiro ; Yamaguchi, Takeo ; Nakao, Sin Ichi. / Ethanol/water transport through silicalite membranes. In: Journal of Membrane Science. 1998 ; Vol. 144, No. 1-2. pp. 161-171.
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