期刊
CATALYSIS COMMUNICATIONS
卷 3, 期 11, 页码 533-539出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1566-7367(02)00210-8
关键词
SO2; sulfated Pt/Al2O3; propane oxidation inhibition; propane oxidation promotion
SO2 adsorption, SO2 oxidation and oxidation of propane with oxygen in the absence and the respective presence of SO2 in the feed gas were studied over unsulfated and sulfated 1% Pt/gamma-Al2O3. Results showed that the promoting effect Of SO2 in the reaction flux on C3H8 oxidation over 1% Pt/gamma-Al2O3 depends on the presulfating temperature. Catalytic activity measurements and FTIR absorption spectra showed that during propane oxidation, Pt/support interfacial adsorbed species were formed at temperatures 25-300 degreesC, inhibiting C3H8 oxidation. However, at higher temperatures these Pt/support interfacial adsorbed species were oxidized, leading to Pt/support interfacial sulfate species, which strongly promote propane oxidation. (C) 2002 Elsevier Science B.V. All rights reserved.
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