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Kinetic Study of Heterogeneously Catalyzed Glucose Oxidation in a Stirred Cell
Author(s) -
Ablasser Cornelia,
Hilger Andreas,
Hinrichsen Olaf
Publication year - 2014
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201400104
Subject(s) - catalysis , gluconic acid , mass transfer , chemistry , chemical engineering , oxygen , liquid phase , reaction rate , limiting oxygen concentration , inorganic chemistry , chromatography , organic chemistry , thermodynamics , physics , engineering
Liquid phase oxidation of glucose to gluconic acid using Bi promoted Pd catalysts was studied in a stirred cell. Gas‐liquid mass transfer limitations are observed at lower but not at higher rotational speeds. The conversion and the deactivation of the Pd catalyst depend on the O 2 concentration in the liquid phase. With decreasing glucose concentration, the reaction rate decreases leading to higher oxygen concentration in the liquid, which deactivates the catalyst due to over‐oxidation. Severe mass transfer limitations even at low Pd loadings could be attributed to intraparticle or liquid‐to‐solid mass transfer.