期刊
APPLIED CATALYSIS A-GENERAL
卷 264, 期 1, 页码 13-22出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2003.12.020
关键词
Fe-ZSM5; alpha-oxygen; N2O; propane oxidation; oxidative dehydrogenation; selective oxidations
Oxidation of propane with oxygen, nitrous oxide or oxygen together with nitrous oxide over ZSM-5 zeolites with low concentration of iron (30-1200 ppm) treated at various conditions was studied at 450 degreesC. The highest conversion of propane (51.7%) and selectivity to propene (39.7%) and to the sum of aromatics and oxygenates (11.5%, mainly C1-C3 alcohols) was achieved if a mixture of oxygen with nitrous oxide was used as oxidant over the steamed FeH-ZSM-5. Based on the ESR results this activity was ascribed to extra-framework Fe-oxo complexes generated by hydrolysis of framework Si-O-Fe bonds followed by extraction of iron to extra-framework positions. (C) 2004 Elsevier B.V. All rights reserved.
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