Investigation of the hydrogenation process of microcrystalline cellulose in the water medium in the presence of catalysts NiCu / SiO2 and NiCuMo / SiO2
Boris Nikolaevich Kuznetsov, Victor Ivanovich Sharypov, Sergei Victorovich Baryshnikov, Natalia Grigorievna Beregovtsova, Vadim Anatolievich Yakovlev
Abstract
The regularities of microcrystalline cellulose (MCC) hydrogenation in a water medium at 185 ° C in the presence of NiCu / SiO2 and NiCuMo / SiO2 catalysts were studied.
It has been found that the preliminary mechanochemical treatment in the planetary mill AGO-2 reduces the degree of MCC crystallinity from 75% to 30% and increases by 2 times the MCC conversion and the yield of soluble oligosaccharides in the process of catalytic hydrogenation. For all studied catalysts the increase of hydrogenation process duration from 1 to 5 hours rises the yield of sorbitol and 5-hydroxymethylfurfural and reduces the yield of glucose. The maximum yield of sorbitol (12 wt.%) was obtained in the presence of NiCuMo / SiO2 catalyst.