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In-Depth study of the adsorptive separation of glucose and xylose with alkaline and alkaline-earth exchanged faujasite zeolites by breakthrough experiments

[Display omitted] •BaX and BaY most selective adsorbents for glucose/xylose separation.•Ethanol addition enhance the higher sugar adsorption.•Co-solvent presence changes the mixture selectivities. In the frame of lignocellulosic biomass valorization into chemicals or fuels, developing separation met...

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Published in:Separation and purification technology 2025-02, Vol.354, p.128784, Article 128784
Main Authors: Ammar, Wassim, Larmier, Kim, Methivier, Alain, Manko, Maria
Format: Article
Language:English
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Summary:[Display omitted] •BaX and BaY most selective adsorbents for glucose/xylose separation.•Ethanol addition enhance the higher sugar adsorption.•Co-solvent presence changes the mixture selectivities. In the frame of lignocellulosic biomass valorization into chemicals or fuels, developing separation methods for streams of carbohydrates by chromatographic separation is necessary. One of the famous separations based on adsorption, is glucose and fructose separation using a SMB technology with ion-exchanged resin. Second generation carbohydrates like glucose and xylose are the main building blocks for various applications including chemicals are fuels, however the fractionation step of these mixtures is needed. In this work, we prepared and characterized X and Y zeolites exchanged by K+, Ca2+, Sr2+ and Ba2+ as potential adsorbents for xylose/glucose separation. We tested their separation performance with adsorption breakthrough experiments. We find that BaX and BaY are the most selective with a selectivity inversion (xylose/glucose selectivity of 1.52 and 0.67 respectively). Addition of ethanol as co-solvent show the higher uptakes of both sugars and changes of selectivities in some adsorbents.
ISSN:1383-5866
DOI:10.1016/j.seppur.2024.128784