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The Impact of Reaction Pressure on the Catalytic Performance of the PdSb/TiO 2 Catalyst in the Acetoxylation of Toluene into Benzyl Acetate
Author(s) -
Madaan Neetika,
Gatla Suresh,
Kalevaru Venkata Narayana,
Radnik Jörg,
Pohl MargaMartina,
Lücke Bernhard,
Brückner Angelika,
Martin Andreas
Publication year - 2013
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201200522
Subject(s) - catalysis , toluene , selectivity , acetic acid , x ray photoelectron spectroscopy , induction period , chemistry , nuclear chemistry , inorganic chemistry , materials science , organic chemistry , chemical engineering , engineering
The acetoxylation of toluene in the presence of acetic acid and oxygen was performed over a PdSb/TiO 2 catalyst at 210 °C and at various reaction pressures (1–10 bar). A remarkable improvement in the catalytic performance and a significant shortening of the induction period were found with an increase in pressure. At a pressure of 6 bar, the highest toluene conversion of 75 % and 100 % selectivity for benzyl acetate were observed. This result could be due to both the restructuring of the catalyst surface and to the formation of active PdSb particles of desired size, composition, and shape during the course of the induction period. Samples of the most‐active and spent catalysts were studied by ex situ and in situ XRD, XPS, and TEM.