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SO 2 /O 2 dehydrogenation of ethylbenzene
Author(s) -
Gaspar N. J.,
Cohen A. D.,
Vadekar M.,
Pasternak I. S.
Publication year - 1975
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.5450530113
Subject(s) - ethylbenzene , dehydrogenation , styrene , oxygen , catalysis , chemistry , selectivity , combustion , mole , inorganic chemistry , copolymer , organic chemistry , polymer
In the SO 2 dehydrogenation of ethylbenzene to styrene using alkalized alumina or titania catalysts, addition of small amounts of oxygen results in (1) higher styrene yields at equivalent SO 2 concentrations, or (2) equivalent styrene yields with lower SO 2 requirements. By staging the oxygen additions, styrene yields of greater than 80% are achieved at SO 2 levels as low as 0.15 mole/mole ethylbenzene when 0.45 mole O 2 is added in increments of 0.15 mole. The low SO 2 concentration and staging of the oxygen result in a high selectivity (94%) for the reaction to styrene by minimizing both byproduct formation and combustion.