Operating Conditions And Intrinsic Kinetics Of Cumene Synthesis From Gas-Phase Alkylation Of Benzene With Isopropanol Over YSBH-02 Catalyst

The operating conditions and intrinsic kinetics of gas-phase alkylation of benzene with isopropanol over a domestic YSBH-02 catalyst were studied using an isothermal integral micro-reactor under atmospheric pressure. Firstly, based on a simple double-separating column GC analytic system developed by author and an isothermal integral micro-reactor, the effect of temperature, benzene/isopropanol mole ratio and liquid space velocity on the alkylation reaction process (including selectivity, conversion and product yield) were investigated by means of the single-factor experimental method under a wide experiment range. And the orthogonal test design was employed to investigate the global effect of these factors above on the alkylation process and the suitable operating conditions were determined as follows: temperature of 280℃, benzene/isopropanol mole ratio of 13 and space velocity of 9 h-1.Secondly, the thermodynamic properties and reaction network of this reaction system were studied systematically based on the GC-MS measuring technology results and the experimental results of the various space velocities. As a result, the main reaction and main side reaction were determined and the reaction network for alkylation of benzene with isopropanol was proposed, which can reasonably explain the experimental phenomena in this paper.Finally, the intrinsic kinetic experiments of alkylation of benzene with isopropanol over YSBH-02 catalyst were carried out in an integral micro-reactor under the following conditions: temperature of 240℃~ 300℃ and benzene/isopropanol mole ratio of 8~17. Power Law type rate equations of this system were established on the basis of reaction network proposed here. The parameters of the kinetic models were estimated by means of Simplex optimal method and the simulation results showed good agreement with experimental data.