Revisiting the Brønsted acid catalysed hydrolysis kinetics of polymeric carbohydrates in ionic liquids by in situ ATR-FTIR spectroscopy

Andreas Jonas Kunov-Kruse, Anders Riisager, Saravanamurugan Shunmugavel, Rolf W. Berg, Steffen Buus Kristensen, Rasmus Fehrmann

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Abstract

A new versatile method to measure rates and determine activation energies for the Brønsted acid catalysed hydrolysis of cellulose and cellobiose (and other polymeric carbohydrates) in ionic liquids is demonstrated by following the C–O stretching band of the glycoside bond with in situ ATR-FTIR. An activation energy in excellent agreement with the literature was determined for cellulose hydrolysis, whereas a distinctly lower activation energy was determined for cellobiose hydrolysis. The methodology also allowed to independently determine activation energies for the formation of 5-hydroxymethylfurfural in the systems
Original languageEnglish
JournalGreen Chemistry
Volume15
Issue number10
Pages (from-to)2843-2848
ISSN1463-9262
DOIs
Publication statusPublished - 2013

Keywords

  • Spectral curve deconvolution
  • Functional theory dft;
  • Crystalline polysaccharides
  • Infrared spectra
  • Stretching vibrations
  • Native celluloses
  • Dehydration
  • Conversion
  • Fructose
  • Glucose

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