Kinetics Study Of Dehydrogenation Of Cyclohexanol To Cyclohexanone On Cu-Zn-Al Catalyst

The dehydrogenation of cyclohexanol to cyclohexanone is a key process in chemical industry, which is required for production of caprolactam and adipic acid, the raw materials for nylon-6 and nylon-66 polymerization processes. In recent years, it is urgent to improve outputs of cyclohexanone as the demands for nylons increase sharply. Thus, it is necessary to study and understand the fundamental kinetics of cyclohexanol dehydrogenation.Some kinetic models of cyclohexanol dehydrogenation to cyclohexanone with LYT-96 Cu-Zn-Al catalyst were conducted on the non-gradient reactor, which is made by American Autoclave Engineers Corporation. First, through changing rotational speed and sizes of catalyst, we removed the mass influence; then we determined the reaction rate of cyclohexanol dehydrogenation, whose agitation rotational speed is 3000rp/min, the pressure is the atmospheric pressure condition, the temperature changes from 220℃to 250℃; we established the surface adsorption mechanism's dynamics models under three kind of suppositions; Finally, we determinated the model parameters of surface adsorption dynamics by model parameter's rational examination and the significance examination, simultaneously has also established experience's power function model.With LYT-96 Cu-Zn-Al catalyst ,agitation rotational speed is 3000rp/min, the pressure is the atmospheric pressure condition, the temperature changes from 220℃to 250℃, the cyclohexanol dehydrogenation to cyclohexanone reaction kinetics equation is: Homogeneous surface adsorption dynamic equation:Experience's power function dynamic equation:The cyclohexanone formation rate or cyclohexane conversion can be predicted by this model. The simulation results are in agreement with that of experimental ones with a relative standard discrepancy RSD< 10%.