NDLI: Intensification of the biocatalytic oxidation of phenol with the use of activators of interface oxygen transfer

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Intensification of the biocatalytic oxidation of phenol with the use of activators of interface oxygen transfer

Content Provider	Springer Nature Link
Author	Borovkova, I. S. Vol’khin, V. V. Kazakov, D. A.
Copyright Year	2011
Abstract	The transport of oxygen from the gas to the aqueous phase determines the rate of the biocatalytic oxidation of phenol. In this work, activators of the interphase transfer of O$_{2}$ are used to intensify the process, thus raising considerably the rate of gas entering the reaction space without additional power consumption, in contrast to the widely used methods of mixing and bubbling. We present the results from studies of the effect a number of substances on the value of K $_{ L }$ a at various mixing speeds of 100 to 1200 rpm. The solid-liquid phase and its activators are compared in terms of effectiveness. The maximum K $_{ L }$ a increase under different hydrodynamic conditions was achieved for activated carbon (3.7 times), aerosol (1.5 times), n-dodecane (3.1 times). These results are explained by a shuttle mechanism of O$_{2}$ phase transfer. It is shown that when K $_{ L }$ a is increased from 2.8 to 18.5 h$^{T-1}$, the biocatalytic oxidation of phenol is accelerated by a factor of 2.4. Using activated carbon as an activator of O$_{2}$ phase transfer allows us to increase the rate of the biocatalytic oxidation of phenol by ∼20%.
Starting Page	306
Ending Page	311
Page Count	6
File Format	PDF
ISSN	20700504
Journal	Catalysis in Industry
Volume Number	3
Issue Number	3
e-ISSN	20700555
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-10-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	biocatalytic oxidation of phenol oxygen transport from the gas to the aqueous phase activators of the interfacial transport of oxygen intensification of oxygen mass transfer the role of hydrodynamic conditions shuttle mechanism Catalysis
Content Type	Text
Resource Type	Article
Subject	Catalysis

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