Cyclohexane oxidation over Cu2O-CuO and CuO thin films deposited by CVD process on fiberglass Article uri icon


  • Cu2O-CuO and CuO thin films on a fiberglass substrate were prepared by chemical vapor deposition (CVD) and then catalytically evaluated by cyclohexane oxidation. The fiber with a Cu2O-CuO film showed a high catalytic activity at low temperatures, for example 43%25 at 350°C, and a good selectivity to cyclohexanol production (37%25 at 300°C). The fiber with a CuO film exhibited a higher catalytic activity, for example 48%25 at 350°C, with a high yield of cyclohexanone (37%25 at 250°C). A CuO/SiO2 catalyst with the same CuO content gave a result similar to the CuO/fiberglass system under the same conditions examined but, on the other hand cyclohexane was cleaved giving a higher selectivity to hexenes, 30%25 at 250°C. The effect of reaction temperature on the catalytic activity and selectivity of cyclohexane oxidation were investigated. At 300°C the steady-state catalytic performance of the CuO/fiberglass experienced a slight deactivation after 4h time-on stream from 40%25 to 38%25 of conversion, after which, the catalyst could be reused apparently without any activity loss. © 2002 Elsevier Science B.V. All rights reserved.

publication date

  • 2003-01-01