1999•Journal of Molecular Catalysis(China)Requires access
Performance of Cr_2O_3/γ-Al_2O_3 Catalyst for Isobutane Dehydrogenation to Isobutene
Jin Xue
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Abstract
The performance of Cr 2O 3/γ\|Al 2O 3 catalyst for isobutane dehydrogenation to isobutene has been studied. The K 2O and CuO can be used as catalyst promoters to improve the performance of Cr 2O 3/Al 2O 3 catalyst. The effects of feed gas space velocity, reaction temperature and catalyst calcination temperature on dehydrogenation performance of the catalyst were investigated also. XRD analysis indicated that Cr 2O 3 was high by dispersed on catalyst surface. KCuO phase in catalyst calcined at 700 ℃ made catalytic activity to decrease. Catalytic surface acidic sites and basic sites were detected by NH 3\| and CO 2\|TPD. The results show that K 2O and CuO modified the acidic and basic properties of Cr 2O 3/γ\|Al 2O 3 catalyst and improved their catalytic activity.