In n, Number Density of Crystals, in (pum 'L-) 950 rpm, 0.361 J/s kg Feeds 400 rpm, Size, um 0.028 J/s · kg Feeds 22.07 23.45 21.66 22.75 11 21.35 22.08 13 20.97 21.36 15 20.77 20.75 17 20.41 20.14 19 20.04 19.57 21 19.77 18.94 23 19.48 18.43 25 19.09 17.75 27 18.85 29 18.49 31 18.11 33 17.87
Fitchett and Tarbell studied the effect of impeller rpm on crystal-size distributions in the continuous precipitation of barium sulfate when mixing solutions of sodium sulfate and barium chloride. Contents of the 1.8-L crystallizer were assumed to be perfectly mixed. In their Run 15, they used feeds with dissolved salts in stoichiometric ratio to give a sodium chloride concentration of 0.15 mol/L and an average residence time of 38 s. Using the MSMPR model, determine from the two sets of data: (a) no , number density of nuclei, nuclei/μm-L; (b) G, linear growth rate,μm/s; (c) Bo , nucleation rate, nuclei/L-s; (d) mean crystal length, μm; (e) nc, number of crystals/volume of mother liquor, crystals/m3 .
Step by step
Solved in 4 steps with 5 images