Premium
Kinetics and Reactor Design for N 2 O Decomposition in the EnviNOx ® Process
Author(s) -
Perbandt Christian,
Bacher Vanessa,
Groves Michael,
Schwefer Meinhard,
Siefert Rolf,
Turek Thomas
Publication year - 2013
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201200163
Subject(s) - mass transfer , catalysis , pressure drop , decomposition , kinetics , plug flow reactor model , chemical kinetics , drop (telecommunication) , zeolite , monolith , dispersion (optics) , materials science , chemistry , chemical engineering , reaction rate , chemical reaction engineering , thermodynamics , continuous stirred tank reactor , chromatography , physics , organic chemistry , mechanical engineering , quantum mechanics , optics , engineering
Abstract The kinetics of N 2 O decomposition over a commercial iron zeolite catalyst was determined in an integral laboratory reactor. The formal kinetic equation developed permits a very good description of the observed rate as a function of temperature and the concentrations of N 2 O, NO and H 2 O. The influence of mass transfer phenomena on the reaction rate was investigated experimentally by using different catalyst particle sizes. A reactor model taking into account internal and external mass transfer resistances, axial dispersion and pressure drop was developed. Reactor simulations for different configurations revealed that random packings of catalyst extrudates must be placed in radial‐flow reactors to limit the pressure drop. Honeycomb monolith catalysts are attractive alternative geometries because they allow both better utilization of active material and the design of more compact reactors.