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Iron-modified Cu/ γ-alumina catalyst for the selective hydrogenolysis of glycerol
Authors: Skuhrovcova Lenka | Kolena Jiri | Frolich Karel | Kocik Jaroslav | Muck Jachym | Gholami Zahra
Year: 2024
Type of publication: článek v odborném periodiku
Name of source: Applied catalysis A: General
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 119849
Titles:
Language Name Abstract Keywords
cze Železem modifikovaný katalyzátor Cu/γ-alumina pro selektivní hydrogenolýzu glycerolu Tato studie představuje nový katalyzátor na bázi Cu pro selektivní hydrogenolýzu glycerolu na 1,2-propandiol. Katalyzátor byl syntetizovaný impregnací mezoporézní γ-aluminy Cu a Fe. Charakterizace byla prováděna za použití různých analytických metod a testy byly prováděny v trubkovém kontinuálním reaktoru za specifických podmínek. Bylo zjištěno, že železo má mnohočetné modifikační účinky, ovlivňující modifikaci Cu klastrů na povrchu katalyzátoru a radiální profil koncentrace Cu uvnitř částic. Fe; Cu; γ-alumina; selektivní hydrogenolýza; glycerol
eng Iron-modified Cu/ γ-alumina catalyst for the selective hydrogenolysis of glycerol This study introduces a novel Cu-based catalyst for the selective hydrogenolysis of glycerol to 1,2-propanediol, synthesized by impregnating mesoporous gamma-alumina with Cu and Fe. Characterization was performed using various analytical methods, and tests were conducted in a tubular continuous reactor under specific conditions. Iron was found to have multiple modifying effects, influencing the modification of Cu clusters on the catalyst surface and the radial Cu concentration profile inside the particles. A low Fe/Cu ratio resulted in an almost eggshell Cu profile, whereas higher Fe levels produced a more uniform distribution. Interestingly, minor Fe additions led to larger Cu clusters, while higher amounts resulted in smaller clusters and decreased glycerol conversion. The effect of Fe on Cu clusters size, acid sites concentration, and Cu radial profile, as well as the influence of these parameters on the glycerol conversion and selectivity towards 1,2-PD are discussed in this study. Glycerol hydrogenolysis; Bimetallic Cu-Fe catalyst; 2-Propanediol; Heterogeneous catalysis; Metal cluster size effect; Acidity-selectivity relationship

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