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Juhasz, Koppany L.
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article
Catalytic hydrogenation of D-xylose over Ru decorated carbon foam catalyst in a SpinChem® rotating bed reactor
Abstract
In this work the activity of ruthenium decorated carbon foam (Ru/CF)catalyst was studied in three phase hydrogenation reaction of d-xylose to d-xylitol.The developed catalyst was characterized by using scanning electronmicroscopy, transmission electron microscopy, X-ray photoelectronspectroscopy, inductively coupled plasma optical emission spectrometryand nitrogen adsorption–desorption measurement. Kinetic measurementswere carried out in a laboratory scale pressurized reactor (Parr<sup>®</sup>) assisted by SpinChem<sup>®</sup> rotating bed reactor (SRBR), at pre-defined conditions (40–60 bar H<sub>2</sub> and 100–120 °C). The study on the influence of reaction conditionsshowed that the conversion rate and selectivity of hydrogenationreaction of d-xylose wassignificantly affected by temperature. These results have been proved bya competitive kinetics model which was found to describe the behaviorof the novel system (Ru/CF catalyst used together with the SRBR) verywell. Besides, it was revealed that the catalytic activity as well asthe stability of our Ru/CF-SRBR is comparable with the commercialruthenium decorated carbon catalyst (Ru/AC) under identical reactionconditions. Moreover, all steps from catalyst preparation and catalystrecycling as well as catalytic testing can be performed in an easy, fastand elegant manner without any loss of materials. Briefly, thedeveloped Ru/CF catalyst used together with the SRBR could be used anexcellent alternative for the conventional Raney nickel catalyst in aslurry batch reactor and offers an attractive concept with obviousindustrial applicability.