Crystal growth mechanism of size-dependent systems in a fluidized bed.

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概要

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• Based on the two-step model, surface-integration coefficients of potassium alum crystals below 5 × 10<SUP>–4</SUP> m grown in a well-suspended fluidized bed were found to decrease sharply with decreasing crystal size so that the growth process is controlled by surface integration for small crystals. The mass-transfer coefficient is independent of crystal size and solution velocity. The mass-transfer resistance becomes significant when crystal size increases, and finally the growth rates become constant since both mass-transfer and surface-integration coefficients are constant. For larger crystals, there is no dominating step in the growth process, both resistances being important.<BR>The crystal growth behavior of various systems other than potassium alum was also examined. Finally, an experimental method for estimating the order of surface-integration rate is suggested.

• The Society of Chemical Engineers, Japanの論文

著者

• Wu Jenn-fang

  Department Of Chemical Engineering National Taiwan University

• TAI Clifford

  Department of Chemical Engineering, National Taiwan University

• Tai Clifford

  Department Of Chemical Engineering National Taiwan University

• Shih Cheng-Yi

  Department of Chemical Engineering, National Taiwan University

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• Crystal growth mechanism of size-dependent systems in a fluidized bed.

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