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Fixed‐bed multisolute adsorption characteristics of nonwet adsorbents
Author(s) -
Rixey William G.,
King C. Judson
Publication year - 1989
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690350107
Subject(s) - amberlite , adsorption , chemistry , aqueous solution , succinic acid , volatility (finance) , diffusion , acetic acid , knudsen number , chromatography , thermal diffusivity , dispersion (optics) , limiting , thermodynamics , organic chemistry , physics , financial economics , optics , economics , mechanical engineering , engineering
Certain nonfunctional macroreticular polymeric adsorbents are nonwet by suffciently dilute aqueous solutions and enable separations not achievable with adsorbents in the prewet state. Fixed‐bed adsorption data were obtained for a multisolute aqueous solution containing acetic acid, 1,3‐butanediol, and succinic acid, with Porapak Q and Amberlite XAD‐4 as adsorbents in both the prewet and nonwet states. The prewet breakthrough data agree with a model allowing for axial dispersion and a linear rate law, using independently estimated parameters. Break‐through curves for the nonwet case depend strongly upon solute volatility since mass transport within the particles appears to occur by Knudsen diffusion, and is rate limiting. Data for Porapak Q reflect an effective particle diffusivity about ten times lower than for Amberlite XAD‐4.