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Complete recovery of cellulose from rice straw pretreated with ethylene glycol and aluminum chloride for enzymatic hydrolysis.

08:00 EDT 21st March 2019 | BioPortfolio

Summary of "Complete recovery of cellulose from rice straw pretreated with ethylene glycol and aluminum chloride for enzymatic hydrolysis."

Rice straw was pretreated with ethylene glycol (EG) and AlCl for enzymatic hydrolysis. EG-AlCl pretreatment had an extremely good selectivity for component fractionation, resulting in 88% delignification and 90% hemicellulose removal, with 100% cellulose recovered or 76% (w/w) cellulose content in solid residue at 150 °C with 0.055 mol/L AlCl. The pretreated residue (5%, w/v) presented a higher enzymatic hydrolysis rate (glucose yield increased 2 times to 94%) for 24 h at cellulase loading of 10 FPU/g. The hydrolysis behavior was correlated with the composition and structure of substrates characterized by SEM, FT-IR, BET, XRD and TGA. The enzyme adsorption ability of pretreated straw was 12-folds that for the original sample. EG-AlCl solution was further cycled for 3 times with 100% cellulose recovery but only 29% lignin removal due to the loss of AlCl. EG-AlCl pretreatment is an efficient method with little loss of cellulose for lignocelluloses.

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This article was published in the following journal.

Name: Bioresource technology
ISSN: 1873-2976
Pages: 98-104

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