Pilot-scale investigation of Pt/alumina catalysts deactivation by organosilicon in the total oxidation of hydrocarbons
Journal article, 2007
The deactivation of alumina-supported platinum catalyst for VOC oxidation by long-term exposure for hexamethyldisiloxane (HMDS) has been investigated in a pilot scale reactor for up to 1000 h of exposure. Catalyst samples were characterized by ICP-AES, BET and silicon deposition by SEM. Catalyst activity was investigated using oxidation of ethyl acetate showing deactivation of the catalyst samples as exposed to HMDS increasing with exposure time. Silicon was shown to deposit on the catalyst as well as on the blank alumina support. SEM investigation of an individual pellet revealed a radial eggshell silicon distribution. CO chemisorption showed strong decrease of Pt active sites after deactivation, while still maintaining reasonable oxidation levels of ethyl acetate.
HYDROGEN
platinum
HEXAMETHYLDISILOXANE HMDS
ethyl acetate
METHANE
GAS
volatile organic compounds
deactivation
PALLADIUM
INHIBITION
PLATINUM
organosilicon
Author
A. C. Larsson
Vaxjo universitet
Mohammad Rahmani
Vaxjo universitet
Karl Arnby
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Competence Centre for Catalysis (KCK)
M. Sohrabi
Amirkabir University of Technology
Magnus Skoglundh
Competence Centre for Catalysis (KCK)
Chalmers, Chemical and Biological Engineering
Neil Cruise
Perstorp Formox
Mehri Sanati
Vaxjo universitet
Topics in Catalysis
1022-5528 (ISSN) 1572-9028 (eISSN)
Vol. 45 1-4 121-124Driving Forces
Sustainable development
Areas of Advance
Nanoscience and Nanotechnology
Transport
Energy
Materials Science
Subject Categories
Chemical Engineering
DOI
10.1007/s11244-007-0251-6