2010•Journal of Xiamen UniversityRequires access
Efficient Conversion of Cellobiose into Sorbitol over Ru/CNTs Catalyst
Tan Xue-song, Weiping Deng, Qinghong Zhang, Yefei Wang, 张庆红
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Abstract
As a model reaction for cellulose transformation,the conversion of cellobiose was studied over supported metallicⅧand IB group elements catalysts,and Ru and Ir were found effective for the formation of sorbitol.Catalytic performances of catalysts on different supports including CNTs,AC,Al_2O_3,SiO_2,HY,CeO_2,MgO showed that CNTs is the most suitable support for metallic Ru species,and a superior performance obtained was 87%yield of sorbitol from the conversion of cellobiose over Ru/CNTs catalysts. The reaction route of cellobiose conversion was proposed.Firstly,cellobiose is transformed into 3-β-D-glucopyranosyl-D-glucitol by hydrogenation.Next,this 3-β-D-glucopyranosyl-D- glucitol was hydrolyzed to sorbitol and glucose which could be hydrogenated to sorbitol very quickly.However,the sorbtiol could also be converted by degradation or isomerization.