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Pd@Al 2 O 3 ‐Catalyzed Hydrogenation of Allylbenzene to Propylbenzene in Methanol and Aqueous Micellar Solutions
Author(s) -
Arbelaez Oscar,
Correa Luis,
Parapat Riny Yolanda,
Knemeyer Kristian,
Bustamante Felipe,
Villa Aída Luz,
Schwarze Michael
Publication year - 2015
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.201500316
Subject(s) - chemistry , methanol , aqueous solution , catalysis , isomerization , sodium dodecyl sulfate , micellar solutions , inorganic chemistry , solubility , bromide , hydrogen , hydrogen bromide , palladium , micelle , photochemistry , organic chemistry , bromine
The palladium on alumina (Pd@Al 2 O 3 )‐catalyzed hydrogenation of allylbenzene to propylbenzene was studied in methanol and aqueous micellar solutions of sodium dodecyl sulfate (SDS), decyltrimethylammonium bromide (DTAB), and t ‐octylphenoxypolyethoxyethanol (TX‐100). Over Pd@Al 2 O 3 , propylbenzene was obtained via direct hydrogenation of allylbenzene and isomerization to β ‐methylstyrene which was hydrogenated afterwards. In aqueous micellar solutions, the reaction was faster than in pure water, but slower than in methanol due to lower hydrogen solubility. In the H 2 O/SDS system, a higher activation energy was obtained than in methanol. For the investigated surfactants, the initial reaction rate in the micellar systems decreased in the order SDS > TX‐100 > DTAB.