The utilization of solid superacids for hydrolysis of glycosidic bonds in di-and polysaccharides: A model study on cellobiose, sucrose, and starch

✍ Scribed by Bärbel Hahn-Hägerdal; Kerstin Skoog; Bo Mattiasson

• Book ID: 104787652
• Publisher: Springer
• Year: 1983
• Tongue: English
• Weight: 416 KB
• Volume: 17
• Category: Article
• ISSN: 1432-0614
• DOI: 10.1007/bf00499501

✦ Synopsis

Solid superacids, perfluorinated resin-sulfonic acid catalysts, were utilized to hydrolyze glycosidic bonds in di-and polysaccharides. In batch experiments cellobiose and starch, at concentrations of 100 g/1 were completely hydrolyzed at 95 ~ C. The reaction catalyzed by solid superacids did not seem to be subject to product inhibition. In continuous experiments a 50% conversion of cellobiose and sucrose was obtained irrespective of substrate concentration in the range of 50-200 g/t. In a plug-flow reactor solid superacids operated continuously without decline in productivity for a period of more than 30 days. Fermentation of cellobiose and starch hydrolysates with Saccharomyces cerevisiae resulted in theoretical yields of ethanol within 24 h; indicating that no toxic by-products were formed during hydrolysis with superacids,