Synthesis and Study on Catalytic Activity of Spinel Metallic Oxides in Styrene Preparation from Ethylbenzene

抄録

A series of spinel oxides AB_2-xB'_xO₄/γ-Al₂O₃ (A: Ni, Cu; B: Cr; B': Fe and x = 0, 0.5, 1, 1.5, 2) were synthesized by two methods: solid-state reaction and coprecipitation. The oxides obtained were characterized by XRD, SEM and BET to determinate their textural and structural properties. Their catalytic activity was evaluated by reaction of oxidative dehydrogenation of ethylbenzene to styrene. The XRD showed the spinel phase formed for all oxides synthesized by two methods. However, the coprecipitation method seems to be more favorable for formation of spinel phase. All samples showed a high catalytic activity and selectivity for oxidative dehydrogenation of ethylbenzene to styrene, especially, in the case of NiCr_2-xFe_xO₄ obtained by coprecipitation method. [DOI: 10.1380/ejssnt.2012.263]