The catalytic performances of monolithic catalyst Ru/Al2O3/Cordierite in selective hydrogenation of benzene to cyclohexene were examined in a circulated monolithic fix-bed reactor.The monolithic catalyst exhibited excellent performances in the selective hydrogenation of benzene to cyclohexene;a high cyclohexene yield of 18% was obtained.The addition of aqueous solution of ZnSO4 during reaction was important to obtain high cyclohexene selectivity.The results indicated that both the catalyst with high activity and selectivity and the intensification of external diffusion for cyclohexene were crucial to get high cyclohexene yield.
The intrinsic kinetics of water gas shift reaction over Pt/CeO 2-ZrO 2 was investigated.Experiments were carried out by means of orthogonal design.Parameters of power-type rate model of water gas shift reaction were determined by the non-linear least-square parameter estimation method.The kinetics of water gas shift reaction over Pt/CeO 2-ZrO 2 was different from that of common commercial catalysts.The accuracy of experimental data and kinetics model was proved by F-examination.
