Oxidative dehydrogenation of n-butane on iron-zinc oxide catalysts

✍ Scribed by H. Armenda´riz; G. Aguilar-Ri´os; P. Salas; M.A. Valenzuela; I. Schifter; H. Arriola; N. Nava

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 546 KB
• Volume: 92
• Category: Article
• ISSN: 0926-860X
• DOI: 10.1016/0926-860x(92)80277-j

✦ Synopsis

The oxidative dehydrogenation of n-butane to butenes over iron-zinc oxide catalysts was etudied. Xray diffraction (XRD), temperature-programmed reduction (TPR) and Mt%sbauer spectroscopy were used to try to identify the catalytically active phase. It was found that the presence of a zinc ferrite (Z&x,0,) phase with a spine1 structure yields high selectivity to butanes. The presence of a second phase, either cu-Fep08 or ZnO, altered the product selectivity. cu-FepOa promoted the formation of carbon dioxide, while ZnO favored selectivity toward butadiene. M6ssbauer spe&oscq y indicated an electronic interaction between zinc oxide and the iron of the zinc ferrite. It is proposed that this electronic interaction may be responsible for the shift in selectivity tc butadiene.