Abstract
Hemicelluloses are the major constituent of biomass and their hydrolysis products xylo-oligosaccharides (XOS) are of great importance to the food, chemical and pharmaceutical industries. In this work, catalytic conversion of bamboo hemicelluloses into XOS was developed using novel solid acid catalysts of sulfonated bamboo-based carbon material (BCS). The Fourier Transform Infrared Spectroscopy characterization of BCS confirmed the successful introduction of acid groups (including –SO3H, –COOH and phenolic –OH) onto its surface. The effects of reaction temperature, residence time and solid acid-to-water ratio on the performance of catalytic conversion were investigated. The maximum XOS yield of 54.7 wt% based on xylan content was obtained at 150 °C for 45 min with a solid acid to water mass ratio of 1:200. The use of water solvent with BCS provides a green and efficient process for hemicellulose conversion.
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