Abstract
CO and CH4 combined oxidation tests were performed over a Pd (70g/ft3)/Co3O4 monolithic catalyst in conditions of GHSV=100,000h−1 and feed composition close to that of emission from bi-fuel vehicles. The effect of SO2 (5ppm) on CO and CH4 oxidation activity under lean condition (λ=2) was investigated. The presence of sulphur strongly deactivated the catalyst towards methane oxidation, while the poisoning effect was less drastic in the oxidation of CO. Saturation of the Pd/Co3O4 catalytic sites via chemisorbed SO3 and/or sulphates occurred upon exposure to SO2. A treatment of regeneration to remove sulphate species was attempted by performing a heating/cooling cycle up to 900°C in oxidizing atmosphere. Decomposition of PdO and Co3O4 phases at high temperature, above 750°C, was observed. Moreover, sintering of Pd0 and PdO particles along with of CoO crystallites takes place.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
More From: Applied Catalysis B: Environment and Energy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
