from first principles PP-I-1

PP-IV-11Conversion of Aspen-Wood and Sucrose under the Action of Dissolved andSolid Acidic CatalystsKuznetsov B.N., Chesnokov N.V., Yatsenkova O.V., Skripnikov A.M., Chudina A.I.,Vakhlevsky S.V.Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russiabnk@icct.ruThe future success of biorefinary will require the new approaches to activation oflignocellulosic materials for further volarization and to design of a new generation of catalystsfor the selective processing of cellulose and lignin.Different methods of aspen wood pretreatment were compared. All studied methods changethe overmolecular structure, chemical composition and reaction ability of wood. Treatmentsby steam at conditions of explosive autohydrolysis and catalytic oxidation by hydrogenperoxide make possible to separate the wood biomass on cellulose, low molecular mass lignin(LMML) and sugars from hemicelluloses.Depending on the used method of wood biomass fractionation and type of furthertransformations of primary products the integrated processing of wood can be directed on thedominant production of liquid biofuels or chemicals. The studied integrated transformation ofwood biomass to liquid biofuels includes the following steps: catalytic oxidation of wood byhydrogen peroxide to cellulose and LMML, acid-catalysed hydrolysis of cellulose to glucose,fermentation of glucose to bioethanol, thermal conversion of lignin to liquid hydrocarbons inethanol medium under the pressure.For promotion the key chemical reactions of integrated transformations of biomass thedissolved and solid acidic catalysts were used. The optimal conditions of alkaline thermalactivation of different carbon-containing natural materials (fossil coal, lignocellulosics,cellulose and lignin) were selected which allow to produce porous carbons with surface area1100–2890 m 2 /g. After acidic treatments they were used as solid acidic catalysts forcarbohydrates hydrolysis and lignin depolymerisation.The dynamics of glucose and fructose formation at sucrose hydrolysis over mesoporouscarbon catalyst Sibunit treated at 150 °C by K 2 Cr 2 O 7 + H 2 SO 4 mixture was studied. Thecomplete conversion of sucrose to glucose and fructose was observed at 80 °C. The activity ofacid-treated Sibunit in sucrose hydrolysis at 80 °C is higher than that of catalyst Nafion NR50 and close to activity of catalyst Amberlyst-15.295