Adsorptive separation of liquid water/acetonitrile mixtures

► Adsorption of water from liquid water/acetonitrile mixtures. ► Screening of 29 adsorbents. ► Kinetics study for water adsorption on 4A and 13X. ► Breakthrough modeling with velocity variation. Twenty-nine adsorbents of different adsorbent classes, compromising zeolites, activated carbon, silicagel...

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Bibliographic Details
Published in:Separation and purification technology 2011-10, Vol.82, p.76-86
Main Authors: Van Assche, T.R.C., Remy, T., Desmet, G., Baron, G.V., Denayer, J.F.M.
Format: Article
Language:English
Subjects:
Acetonitrile
activated carbon
Adsorbents
Adsorption
Applied sciences
Breakthrough experiments
Chemical engineering
Diffusion
diffusivity
Exact sciences and technology
Isotherms
Liquids
Mathematical models
Separation
Water
Zeolites
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Summary:► Adsorption of water from liquid water/acetonitrile mixtures. ► Screening of 29 adsorbents. ► Kinetics study for water adsorption on 4A and 13X. ► Breakthrough modeling with velocity variation. Twenty-nine adsorbents of different adsorbent classes, compromising zeolites, activated carbon, silicagel and metal–organic frameworks (MOF) were tested in batch adsorption experiments with liquid water/acetonitrile mixtures. Their performance in the selective separation of water from acetonitrile (ACN) was evaluated by analyzing these experimental batch isotherm data with a breakthrough model. Water isotherms (296 K) and diffusion coefficients of both water and ACN are presented for promising adsorbents. 4A zeolite was identified as a suitable adsorbent; it allowed successful fixed bed adsorption column separation of liquid water/acetonitrile mixtures with water contents up to 40 wt.%. The breakthrough curves were compared to numerical and analytical models for fixed bed adsorption, using independently determined diffusion and adsorption equilibrium parameters.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2011.08.027