Premium
Comparative studies of dehydrocyclization of n ‐octane and iso ‐octane on bifunctional and monofunctional Pt/Al 2 O 3 catalysts
Author(s) -
Ako Churchill T.,
Susu Alfred A.
Publication year - 1993
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270160103
Subject(s) - octane , bifunctional , benzene , chemistry , catalysis , octane rating , bifunctional catalyst , inorganic chemistry , organic chemistry
The dehydrocyclization of n ‐octane and iso ‐octane to ethyl benzene, and ortho ‐, para ‐, and meta ‐xylenes was investigated on mono‐ and bifunctional platinum/alumina catalysts in a microcatalytic reactor with hydrogen as carrier at 1.8 atm pressure and between temperatures of 573 and 763 K, using pulse technique. On bifunctional Pt/Al 2 O 3 catalyst, the total conversion of both n ‐octane and iso ‐octane was found to start from a high value and decrease with increasing temperature for all pulse volumes investigated. However, iso ‐octane was found to be more reactive than n ‐octane. There was only one primary product, namely iso ‐octane, in the n ‐octane reaction. As regards the iso ‐octane reaction, two primary products, ethyl benzene and o ‐oxylene were identified. For both reactions, these primary products decreased to a minimum as temperatures increased. On monofunctional (non‐acidic) Pt/Al 2 O 3 , the total conversion of n ‐octane increased with temperature and passed through a maximum. The primary products of the reaction were ethyl benzene and o ‐xylene.