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Journal of Applied Electrochemistry

, Volume 21, Issue 4, pp 321–326 | Cite as

Simultaneous electrolytic production of xylitol and xylonic acid from xylose

  • A. Jokic
  • N. Ristic
  • M. M. Jaksic
  • M. Spasojevic
  • N. Krstajic
Article

Abstract

A new electrocatalytic process for simultaneous electrolytic production of xylitol and xylonic acid or the corresponding xylonate salts directly from α-d-xylose in alkaline solutions of neutral salt as supporting electrolyte has been developed and presented. An electrocatalytically active cathode coating with essentially hydridic features has been employed to enhance Faradaic yields in xylitol production at low current densities by heterogeneous reaction of hydrogenation with H-adatoms, and the entire mechanism has been proved by experimental evidence. An anionic selective anodic coating for titanium substrate was also used to suppress oxygen evolution and optimize the xylonic acid production by direct oxidation with anodically generated bromine, and to carry out the electrode process at almost equilibrium potential. The kinetic effect of specifically adsorbable anions for decreasing cathodic current yields in xylitol production and the resulting necessity for membrane separation of catholyte from anolyte, with proper optimization of the supporting neutral salt composition, has also been emphasized.

Keywords

Xylose Xylitol Titanium Substrate Xylitol Production Neutral Salt 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Chapman and Hall Ltd. 1991

Authors and Affiliations

  • A. Jokic
    • 1
  • N. Ristic
    • 1
  • M. M. Jaksic
    • 1
  • M. Spasojevic
    • 2
  • N. Krstajic
    • 3
  1. 1.Faculty of AgricultureUniversity of BelgradeBelgradeYugoslavia
  2. 2.Faculty of AgricultureUniversity of KragujevacCacakYugoslavia
  3. 3.Faculty of Technology and MetallurgyUniversity of BelgradeBelgradeYugoslavia

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