Glucose oxidation in a three-phase stirred airlift reactor: experiments and model

Abstract

The three-phase catalytic oxidation of glucose into gluconic acid is studied in a new type of reactor: a stirred internal-loop airlift reactor. The in¯uence of oxygen¯ow rate and of agitation on reaction rate are experimentally checked. By means of a model, a better knowledge of the reaction kinetic order for oxygen is reached.

Effect of hydrodynamics on kinetics of gluconic acid enzymatic production in bubble column reactor

“…It can be easily recognized that gas velocity has a positive effect on reaction rate and with increasing gas velocity, the reaction rate increases. The results of this study are in agreement with those in literature [15,16] al. [15] concluded that the reaction rate depended on gas velocity for u G < 1.17 cm s -1 while it was independent of gas velocity for u G > 1.17 cm s -1 .…”

“…The results of this study are in agreement with those in literature [15,16] al. [15] concluded that the reaction rate depended on gas velocity for u G < 1.17 cm s -1 while it was independent of gas velocity for u G > 1.17 cm s -1 . In the present work, the range of gas velocity was between 0.14-1.12 cm s -1 which is less than 1.17 cm s -1 and the reaction rate was found to be affected by the gas velocity.…”

“…Afterwards, Bang et al [15] investigated glucose oxidation in a three-phase stirred airlift reactor. They highlighted the influence of oxygen concentration and gas velocity on the reaction rate and concluded that the reaction rate noticeably increases with oxygen concentration in gas phase as well as gas velocity.…”

Kinetic Study of Heterogeneously Catalyzed Glucose Oxidation in a Stirred Cell

“…Different three-phase reaction systems are used for the evaluation of the reaction. Kinetic performances are mainly investigated in slurry reactors [11 -14], but spinning disc reactors [15], rotating foam reactors [11], or internal loop airlift reactors [16] are also used. Tschentscher et al [11] showed the influence of process conditions on the reactor performance.…”

Continuous gluconic acid production by Aureobasidium pullulans with and without biomass retention

“…The immobilization of whole cells or glucose oxidase enzyme by various techniques has often been reported to be a useful approach to the production of gluconic acid or other microbial metabolites (Hartmeier and Döppner, 1983;Pronk et al 1989;Sakurai et al 1989;Gromada and Fiedurek, 1997;Nakao et al 1997;Kara and Bozdemir, 1998;Velizarov and Beschkov, 1998;Anastassiadis et al 1999;Sankpal et al 1999;Bang et al 1999;Ferraz et al 2000;Bao et al 2001;Blandino et al 2001;Klein et al 2002;Anastassiadis et al 2003;Godjevargova et al 2004;Anastassiadis et al 2005;Mukhopadhyay et al 2005). Fluidized bed reactors have been often used for several fermentation applications, in especially for anaerobic processes.…”