Thermodynamic analysis of temperature dependence of the crystal growth rate of potassium sulfate

Fangqin Cheng; Yang Bai; Chang Liu; Xiaohua Lu; Chuan Dong

doi:10.1021/ie0513649

Thermodynamic analysis of temperature dependence of the crystal growth rate of potassium sulfate

Fangqin Cheng, Yang Bai, Chang Liu, Xiaohua Lu^*, Chuan Dong

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

In this work, the effect of temperature on the crystal growth rate of potassium sulfate in aqueous K ₂ SO ₄ and KCl-K ₂ SO ₄ solutions is analyzed. The crystal growth rate equation of K ₂ SO ₄ is developed on the basis of the difference of chemical potentials of K ₂ SO ₄ at the solid-liquid interface. The Lu-Maurer model is used to predict the activity coefficient of K ₂ SO ₄ . The crystal growth rate of K ₂ SO ₄ in aqueous K ₂ SO ₄ solution decreases, then increases with increasing temperature, and reaches its lowest value around 303.15 K, which is in accordance with previous experimental results. Meanwhile, the optimal crystallization temperature of K ₂ SO ₄ in aqueous KCl-K ₂ SO ₄ solution is discussed. An effective method is found to increase the yield of K ₂ SO ₄ by increasing the crystallization temperature to 333.15 K.

Original language	English
Pages (from-to)	6266-6271
Number of pages	6
Journal	Industrial and Engineering Chemistry Research
Volume	45
Issue number	18
DOIs	https://doi.org/10.1021/ie0513649
Publication status	Published - 1 Aug 2006

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@article{798c38c44b9a49889e2bc3e85f1964a1,

title = "Thermodynamic analysis of temperature dependence of the crystal growth rate of potassium sulfate",

abstract = " In this work, the effect of temperature on the crystal growth rate of potassium sulfate in aqueous K 2 SO 4 and KCl-K 2 SO 4 solutions is analyzed. The crystal growth rate equation of K 2 SO 4 is developed on the basis of the difference of chemical potentials of K 2 SO 4 at the solid-liquid interface. The Lu-Maurer model is used to predict the activity coefficient of K 2 SO 4 . The crystal growth rate of K 2 SO 4 in aqueous K 2 SO 4 solution decreases, then increases with increasing temperature, and reaches its lowest value around 303.15 K, which is in accordance with previous experimental results. Meanwhile, the optimal crystallization temperature of K 2 SO 4 in aqueous KCl-K 2 SO 4 solution is discussed. An effective method is found to increase the yield of K 2 SO 4 by increasing the crystallization temperature to 333.15 K.",

author = "Fangqin Cheng and Yang Bai and Chang Liu and Xiaohua Lu and Chuan Dong",

year = "2006",

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doi = "10.1021/ie0513649",

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volume = "45",

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journal = "Industrial and Engineering Chemistry Research",

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TY - JOUR

T1 - Thermodynamic analysis of temperature dependence of the crystal growth rate of potassium sulfate

AU - Cheng, Fangqin

AU - Bai, Yang

AU - Liu, Chang

AU - Lu, Xiaohua

AU - Dong, Chuan

PY - 2006/8/1

Y1 - 2006/8/1

N2 - In this work, the effect of temperature on the crystal growth rate of potassium sulfate in aqueous K 2 SO 4 and KCl-K 2 SO 4 solutions is analyzed. The crystal growth rate equation of K 2 SO 4 is developed on the basis of the difference of chemical potentials of K 2 SO 4 at the solid-liquid interface. The Lu-Maurer model is used to predict the activity coefficient of K 2 SO 4 . The crystal growth rate of K 2 SO 4 in aqueous K 2 SO 4 solution decreases, then increases with increasing temperature, and reaches its lowest value around 303.15 K, which is in accordance with previous experimental results. Meanwhile, the optimal crystallization temperature of K 2 SO 4 in aqueous KCl-K 2 SO 4 solution is discussed. An effective method is found to increase the yield of K 2 SO 4 by increasing the crystallization temperature to 333.15 K.

AB - In this work, the effect of temperature on the crystal growth rate of potassium sulfate in aqueous K 2 SO 4 and KCl-K 2 SO 4 solutions is analyzed. The crystal growth rate equation of K 2 SO 4 is developed on the basis of the difference of chemical potentials of K 2 SO 4 at the solid-liquid interface. The Lu-Maurer model is used to predict the activity coefficient of K 2 SO 4 . The crystal growth rate of K 2 SO 4 in aqueous K 2 SO 4 solution decreases, then increases with increasing temperature, and reaches its lowest value around 303.15 K, which is in accordance with previous experimental results. Meanwhile, the optimal crystallization temperature of K 2 SO 4 in aqueous KCl-K 2 SO 4 solution is discussed. An effective method is found to increase the yield of K 2 SO 4 by increasing the crystallization temperature to 333.15 K.

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SN - 0888-5885

VL - 45

SP - 6266

EP - 6271

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 18

ER -

Thermodynamic analysis of temperature dependence of the crystal growth rate of potassium sulfate

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