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Experimental and analytical study of wall reaction and transport effects in fast reaction systems
Author(s) -
Smith Geoffrey K.,
Krieger Barbara B.,
Herzog Peter M.
Publication year - 1980
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690260407
Subject(s) - damköhler numbers , dimensionless quantity , reaction rate , chemistry , work (physics) , thermodynamics , homogeneous , residence time (fluid dynamics) , diffusion , flow (mathematics) , volumetric flow rate , mechanics , plug flow , catalysis , physics , biochemistry , geotechnical engineering , engineering , combustion
This paper extends previous modeling calculations of concentration profiles and reaction rates in tubular flow reactors by including very fast wall reactions such as surface catalyzed atom recombinations. The plug flow assumption is investigated and found to be valid in tubular flow reactors when the dimensionless wall reaction rate is less than on ( H < 1), and the dimensionless ratio of homogeneous reaction rate to diffusion rate (Damkohler number) is greater than one (α > 1). If these criteria are not met, this work provides a correlation yielding a correction factor which can be applied to the mean residence time. The method is applied to experimental data relating to the deactivation probability of two types of atoms on teflon and quartz. Values of 1.0 + 0.2 × 10 −4 and 1.7 + 0.4 × 10 −4 for the deactivation probabilities of 0 and N atoms, respectively, are reported.