采用浸渍-热分解法制备了纳米Fe2O3-K2O催化剂,并在常压和520～580 ℃的条件下,考察了其对乙苯催化脱氢反应的催化性能. 结果发现,纳米Fe2O3-K2O催化剂表现出很好的活性和稳定性. 在550 ℃, N2/H2O/乙苯摩尔比为30.7/10/1和WHSV=0.43 h-1的条件下,纳米Fe2O3-K2O催化乙苯脱氢的转化率为71.9%, 苯乙烯选择性为91.1%. 透射电子显微镜和X射线衍射测试结果表明,氧化铁的粒径为10～14 nm. 催化剂的尖晶石结构和高比表面积是其表现出高催化性能的主要原因.
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