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Kinetic modeling of the hydrolysis of carbon disulfide catalyzed by either titania or alumina
Author(s) -
Tong S.,
Dalla Lana I. G.,
Chuang K. T.
Publication year - 1995
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450730208
Subject(s) - catalysis , hydrolysis , adsorption , chemistry , kinetics , carbon disulfide , inorganic chemistry , reaction rate , kinetic energy , reaction mechanism , rate determining step , organic chemistry , physics , quantum mechanics
The reaction rates for the hydrolysis of CS 2 on either alumina (Kaiser 201) or titania (CRS 31) were measured at 150 kPa and from 270 to 330°C using a laboratory Berty reactor over ranges of water concentration (2–12 mol%) and CS 2 concentration (0.5–2 mol%). Four mechanism‐related model functions were tested in the search for the best‐fitting rate function by using non‐linear regression techniques. The results show that the Eley‐Rideal rate function best‐fitted the kinetics using either Kaiser 201 or CRS 31 with different parameters. The kinetic parameters obtained confirm that CRS 31 appears to have the higher activity of the two catalysts for CS 2 hydrolysis. The strong adsorption of water vapor on each of the two catalysts studied inhibits the hydrolysis rate and affords an effective reaction order close to zero for H 2 O, possibly by saturating the catalysis surface and reducing the fraction of catalyst surface available for CS 2 and COS adsorption.