Effect of enhanced support acidity on the sulfate storage and the activity of Pt/γ-[Al.sub.2][O.sub.3] for NO oxidation and propylene oxidation

Effect of enhanced support acidity on the sulfate storage and the activity of Pt/γ-[Al.sub.2][O.sub.3] for NO oxidation and propylene oxidation

NO oxidation and propylene oxidation were studied on standard and acidity-enhanced Pt/[Al.sub.2][O.sub.3] catalyst. Deactivation by platinum oxide formation was suppressed by the presence of chlorine and sulfates. After a long S[O.sub.2] exposure, the activity of modified catalysts was higher than t...

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Veröffentlicht in:Catalysis letters 2014-01, Vol.144 (1), p.22
Hauptverfasser: Auvray, Xavier P, Olsson, Louise
Format: Artikel
Sprache:eng
Schlagworte:
Hydrogen-ion concentration
Oxidation-reduction reaction
Propylene
Sulfates
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Zusammenfassung:NO oxidation and propylene oxidation were studied on standard and acidity-enhanced Pt/[Al.sub.2][O.sub.3] catalyst. Deactivation by platinum oxide formation was suppressed by the presence of chlorine and sulfates. After a long S[O.sub.2] exposure, the activity of modified catalysts was higher than the standard catalyst. The aged chlorinated sample showed the best propylene oxidation activity while the sulfated one exhibited the best NO conversion.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-013-1145-9