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OP-I-26strong influence on the solid suspension. The value of the standard deviation of axialsolid distribution was decreased from 0.585 to 0.081 when the solid density wasincreased from 2300 to 8000 kg/m 3 .An influence of the impeller speed on the solid suspension is shown on Fig. 2.The solid density was equal to 2300kg/m 3 . A computational results show thatincrease of the agitated intensity as impeller speed from 50 to 200 rpm leaded to thedeterioration of the axial solid distribution. The value of the standard deviation of theaxial solid distribution was increased from 0.307 to 0.743. This result could beexplained as the feature of intermixing flow in the stirred tank with five specificimpellers and a manner of input solid into stirred tank on upper surface of liquid at thestart time. Impellers separate tank on four domains with the swirling flow which areheld up solid particles competing with gravitational force on solid suspension.Conclusions. The distribution of the solid suspension in the height of the slurryreactor substantially depends on the solid density of the catalyst. The heavierparticles create more uniform axial distribution of the solid suspension, if they wereintroduced on the upper boundary of liquid phase.The increase of the mixing speed for the particles with solid density 2300kg/m 3causes increase of the nonuniformity of the axial distribution.11Dimensionless height, L/L O0.80.60.40.202300 kg/m35000 kg/m38000 kg/m30 0.5 1 1.5 2 2.5Dimensionless volume fraction of solidDimensionless height, L/L O0.80.60.40.2050 rpm100 rpm200 rpm0 0.5 1 1.5 2 2.5Dimensionless volume fraction of solidFig. 1. The normalized axial solid concentrationprofiles⎯φ as a function of the solid density ρ s .Ω=100 rpm.Fig. 2. The normalized axial solid concentrationprofiles⎯φ as a function of the impeller speed Ω.ρ s =2300 kg/m 3 .References[1]. V.A.Semikolenov. Russian Journal of Applied Chemistry, 1997, Vol. 70, No. 5.[2]. G. Montante, G. Micale, F. Magelli, A. Brucato. Trans IChemE, 2001, Vol. 79, Part A,pp. 1005-1010.[3]. D.A. Deglon, C.J. Meyer. Minerals Engineering. 2006, Vol.19, pp. 1059–1068.87