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Multiphase catalysis. II. Hollow fiber catalysts
Author(s) -
Rony Peter R.
Publication year - 1971
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260130310
Subject(s) - catalysis , michaelis–menten kinetics , diffusion , chemistry , cartesian coordinate system , thermodynamics , reaction–diffusion system , fiber , constant (computer programming) , reaction rate constant , chemical engineering , materials science , kinetics , organic chemistry , geometry , mathematics , physics , enzyme , classical mechanics , computer science , enzyme assay , programming language , engineering
A theory of diffusion control within hollow fiber catalysts is derived for three different types of coordinate geometries: Cartesian, cylindrical, and spherical. Effectiveness factors are calculated and formulas for reactant conversion in both a fixed‐bed and a contimunuous‐feed stirred‐tank reactor are derived. The apparent Michaelis constant, K m ′, is a measure of the amount of diffusion control within the catalysts. When K m ′ is equal to K m , the true Michaelis constant, there is no diffusion control. In all other cases K m ′ is greater than K m . Hollow fibers are attractive alternatives to spherical microcapsules for the encapsulation of enzymes.