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应用动态法在常压260℃~284℃条件下获得环已烷在 SiO_2、Al_2O_3和TiO_2三种载铂催化剂上脱氢反应的吸附和表面反应速度常数。结果表明:对 Pt/TiO_2催化剂,诸动力学参数均较其它三者为低。而对 Pt/SiO_2和 Pt/Al_2O_3,虽具有相同的总包反应速度常数,但其表面反应速度常数和吸附平衡常数完全不同。在反应条件下三种催化剂上的反应均为表面反应控制。
The dynamic adsorption and surface reaction rate constants of cyclohexane on the three supported platinum catalysts of SiO_2, Al_2O_3 and TiO_2 were obtained by the dynamic method under atmospheric pressure of 260 ℃ ~ 284 ℃. The results show that for the Pt / TiO 2 catalyst, the kinetic parameters are lower than the other three. Although Pt / SiO_2 and Pt / Al_2O_3 have the same total reaction rate constants, their surface reaction rate constants and adsorption equilibrium constants are totally different. The reaction on the three catalysts under the reaction conditions are all surface reaction controlled.