Simulation of metastable zone width and induction time for a seeded aqueous solution of potassium sulfate |
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| Authors: | M Kobari N Kubota I Hirasawa |
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| Institution: | 1. JGC corporation 2-3-1, Minato Mirai, Nishi-ku, Yokohama 220-6001, Japan;2. Department of Chemical Engineering, Iwate University, 4-3-5 Ueda, Morioka 020-8551, Japan;3. Department of Applied Chemistry, School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan |
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| Abstract: | The metastable zone width (MSZW, ΔTm) and induction time (tind) were determined with computer simulation for seeded batch crystallization of potassium sulfate from aqueous solution. The MSZW and induction time determined with simulation showed the same behavior as experimental values reported in the literature; log (ΔTm) increased linearly with an increase in log R (R: cooling rate) and tind decreases in proportion to (ΔT)−n (ΔT: supercooling, n: nucleation order in the secondary rate expression of B=kn(ΔT)n). The secondary nucleation parameters (kn and n) were deduced both from the simulated MSZW and induction times by using the previously proposed model J. Cryst. Growth, 2010, 312, 548–554]. The secondary nucleation rate calculated with the deduced parameters was in agreement with that calculated with the parameters input for simulation. |
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| Keywords: | A1 Computer simulation A1 Induction time A1 Metastable zone width A1 Nucleation A2 Industrial crystallization A2 Seed crystals |
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