The Dehydrogenation of Cyclohexane
on an AP-64 Industrial Platinum Catalyst Subjected
to Plasma Chemical Treatments

V. D. Yagodovskii^a, Z. V. Pskhu^a, N. Yu. Isaeva^a, T. V. Yagodovskaya^b, R. A. Kifyak^a,
and K. S. Belyaeva^a

^a Peoples Friendship University, ul. Miklukho-Maklaya 6, Moscow, 117198 Russia

^b Faculty of Chemistry, Moscow State University, Moscow, 119991 Russia

e-mail: vicyag@mail.ru

Received March 11, 2008

Abstract—The influence of glow discharge plasma in oxygen and argon and high-frequency discharge plasma
in hydrogen on the activity of the AP-64 (Pt/-Al₂O₃) catalyst in the dehydrogenation of cyclohexane was stud-
ied. The catalytic experiments were performed in a flow unit and under static conditions in a vacuum. Under
flow conditions, catalyst treatment with plasmas in O₂ and Ar decreased the yield of benzene by ~50% but
strengthened temperature hysteresis because of the formation of active carbon on the surface of the catalyst.
Under static conditions, argon plasma and high-frequency discharge H₂ plasma multiply increased the rate of
the reaction because of an increase in the number of active centers, whereas an oxygen plasma decreased the
rate of the reaction by two times because of an increase in activation energy. The determination of the order of
the reaction led us to suggest that the stage scheme of the reaction did not change after plasma chemical catalyst
treatments.

DOI: 10.1134/S0036024409050082

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