Optimization of Constituents of (Ni, MO, Cu)/Kieselguhr Catalyst by Response Surface Methodology for Glycerol Production by Hydrogenolysis of Sucrose
نویسنده
چکیده
Sucrose hydrogenolysis is industrially important for the production of polyols. To provide high glycerol yield under milder reaction conditions, a nickel catalyst promoted by Molybdenum and copper supported on kieselguhr was synthesized and optimized using Response Surface Methodology. A 3X5 experimental design has been adopted to study the effect of these constituents. 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. Increase in nickel loading in the catalyst increased its activity. Increase in Molybdenum also increased the catalyst activity but changed the reaction mechanism as well. Increase in copper caused the direct hydrogenolysis of sucrose instead of its first splitting into monosaccahrides and their subsequent hydrogenolysis. Maximum glycerol yield of 27.79% was identified at an optimum nickel, Molybdenum and copper concentration of 29.80%, 10.0%, and 1.07%, respectively. The optimized catalyst has been characterized by the electron microscopy, Xray diffraction, and magnetic measurement techniques.
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