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Initial rate study on the vapor‐phase condensation of aniline to diphenylamine
Author(s) -
Das Gautam,
Biswas Asok K.
Publication year - 1986
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.5450640317
Subject(s) - diphenylamine , aniline , chemistry , condensation , activation energy , phase (matter) , dispersion (optics) , catalysis , analytical chemistry (journal) , atmospheric pressure , reaction rate constant , atmospheric temperature range , thermodynamics , kinetics , organic chemistry , physics , meteorology , optics , quantum mechanics
The vapor‐phase condensation of aniline to diphenylamine has been studied in a downflow differential reactor at 370–426°C and under atmospheric pressure using H‐151 ALCOA catalyst. An initial rate equation based on the Langmuir‐Hinshelwood model, i.e. surface reaction control with a similar dual site mechanism, has been proposed: r o = (k 1 K A 2 p Ao 2 )/ (1 + K A p Ao ) 2 The effects of different mass transfer resistances, of longitudinal and of radial dispersion have been taken into consideration. The rate constant value at 404°C is 1.488 × 10 −7 (k mol)/ (s) (kg cat) [5.358 × 10 −4 (mol)/ (h) (g cat)] and the activation energy is calculated to be 123.3 kJ/mol [29.45 k cal/mol] in the working temperature range.