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Selective hydrogenation of styrene. II. Poisoning of Pd/Al 2 O 3 by thiophene and pyridine
Author(s) -
L'Argentiere Pablo C.,
Fígoli Nora S.
Publication year - 1990
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280480311
Subject(s) - pyridine , thiophene , ethylbenzene , styrene , catalysis , chemistry , inorganic chemistry , photochemistry , polymer chemistry , organic chemistry , copolymer , polymer
The poisoning of a commercial Pd/Al 2 O 3 catalyst by pyridine and thiophene during the selective hydrogenation of styrene to ethylbenzene was studied. It was found that the Pd electronic state is the main factor controlling the interaction between the metal and the poisons. Pyridine added to the non‐poisoned feed in a pulse produces a modification in the Pd electronic state and a decrease in conversion, but, within certain limits, inhibits the adsorption of more pyridine or thiophene molecules.