Using an up-flow reactor with inner diameter of 280 mm

the industrial gas phase with air and the residual oil with the mixture of glycerol and water are simulated. The effects of particle size

particle density

liquid viscosity and the ratio of bed height to diameter under different operating conditions on the total bed pressure drop and its fluctuation

and the axial back-mixing were investigated in an up-flow reactor packed by alumina spherical catalyst particles. A correlation of pressure drop is obtained with the relative error below 12% which is suitable for gas-liquid-solid systems simulated industrial operating system and operating conditions in an up-flow reactor. The total pressure drop decreases with the increase of particle size

the ratio of height to diameter

particle density and liquid viscosity. The pressure fluctuation becomes stronger when the superficial gas velocity increases. The axial back-mixing in the reactor packed by smaller size and smaller density particles with the larger ratio of height to diameter is more serious. Both bed pressure drop and axial back-mixing increase with the increasing superficial gas velocity.