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he samples of ruthenium impregnated in hypercrosslinked polystyrene and activated carbon were tested in D-glucose hydrogenation using butch reactor, shaker type reactor and fix bed reactor system to evaluate catalysts long term stability. Catalysts were characterized by nitrogen physisorption, X-Ray photoelectron spectroscopy, hydrogen chemisorption, X-Ray fluorescence analysis. Physicochemical changes of the studied catalysts are shown during catalysts stability investigation. A strong influence of the reactor type on catalysts stability in D-glucose hydrogenation is discussed.

We studied the kinetics of glucose hydrogenation over a catalyst containing Ru nanoparticles in a super cross linked polystyrene matrix. Two hydrogenation pathways, whose rates differ by several orders of magnitude ("fast" and "slow" pathways), were found. The first pathway includes the reaction of glucose from its aqueous solution with hydrogen sorbed on the catalyst's metal, and the second one includes the reaction of sorbed substrate with hydrogen occurring on the catalyst support due to spillover. A mathematical descrip tion of the reaction pathways was proposed, and the most probable scheme of the process was suggested. The role of hydrogen spillover in the kinetics of the occurring processes was considered.