Oxidative hydrolysis of cellobiose to glucose

  • Deng W
  • Lobo R
  • Setthapun W
 et al. 
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Abstract

Abstract Cellobiose hydrolysis into glucose was chosen as a model system for cellulose breakdown to investigate glycosidic bond cleavage. The hydrolysis was enhanced by increased acidity in an inert gas medium, while air-assisted hydrolysis with a neutral solution achieved over 70% glu- cose yield. Hydrogen peroxide, as a stronger oxidant than air, converted cellobiose to carboxyl compounds, which lowered the glucose selectivity. At 150 C, the selectivity from cellobiose to glucose was very low on porous c-Al2O3 supported catalysts, even lower than without a catalyst. When the active metals were prepared on non-porous sup- ports such as spherical alumina (a phase), the overall yield of glucose was dramatically improved at 120 C. Similar improvements were obtained for another disaccharide model, sucrose, which achieved greater than 90% sucrose conversion with selectivity in excess of 90% at 80 C.

Author-supplied keywords

  • Cellobiose
  • Glucose
  • Non-porous support
  • Oxidative hydrolysis
  • Sucrose

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