Low molecular weight alcohols were selectively produced form sugars such as sucrose; glucose and fructose by means of Ni,W,Cu/ kieselguhr catalyst in aqueous solution under hydrogen gas atmosphere 50atm. Nickel catalyst promoted by tungsten (w) and copper (cu) supported on kieselguhr was synthesized for the hydrogenolysis of sucrose by simultaneous co-precipitation and digestion method. The catalyst provide high product yield under milder conditions. Optimization of catalyst preparation variables included temperature of catalyst during Na2Co3 addition, addition time of Na2Co3 solution on the catalyst and digestion time after addition of aqueous solution of Na2Co3. A 3X5 experimental design has been adopted to study the effect of process variables on glycerol yield. A linear second order model has been developed to optimize and to study the interaction effects on glycerol yield in the catalytic hydrogenolysis of sucrose. The maximum glycerol yield ( 35. 54%) was obtained with temp of catalyst during sodium carbonate addition (82. 069 0C), addition time of Na2CO3 solution of the catalyst (114. 83 min. ) and digestion time after addition of aqueous solution of Na2CO3 (119. 612 min. )

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Hydrogenolysis Optimization Glycerol Yield Kieselguhr Catalyst Rsm