Fast Chemical Reactions in Liquid-solid Systems Condensation Method of Suspension Synthesis

5 Fast Chemical Reactions in Liquid-solid Systems (Condensation Method of Suspension Synthesis) 

In order to study the prospects of the application of diffuser-confusor designed tubular turbulent reactors for the production of homogeneous finely dispersed suspensions, by condensation in fast chemical reactions, and to compare their operating efficiency with volume reactors, a model reaction, which occurs at high rate, was chosen [28]  

Bulk mixing reactor with baffle walls  

In this case, in accordance with the Svedberg-Oden equation, the mass ntj of the fraction of suspended particles with the radius r r settled by the time can be calculated  

The microscopic analysis of the synthesised suspensions showed that the BaS04 particles are anisometric (rods with a ratio of length to diameter of 4 1, which explains the sigmoidal appearance of the sedimentation inflection curves). At the initial phase of sedimentation, the rod-like particles may rotate, which provides additional resistance to their movement (similar to an increase in viscosity), and decelerates the sediment accumulation rate. Moreover, during free sedimentation, the aspherically formed particles provide maximum resistance to their own motion. This also decreases the sedimentation rate of the solid particles and complicates the definition of their true size. Therefore, the equivalent radius r (radius of spherical particle, settling at the same rate) was defined according to the results of sedimentation analysis. 

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