Volume 56, Issue 2 2000161
Original Paper

Effect of Sodium Sulfate on Nucleation Behavior and the Crystal Morphology of Taurine

Di Wu

Di Wu

National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China

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Bei Zhang

Bei Zhang

National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China

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Weijia Luo

Weijia Luo

School of Microelectronics, Tianjin University, Tianjin, 300072 China

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Huaxiang Zhu

Huaxiang Zhu

National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China

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Jun Xu

Jun Xu

Health Science Platform, Tianjin University, Tianjin, 300072 China

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Lina Zhou

Lina Zhou

National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072 China

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Baohong Hou

Baohong Hou

National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072 China

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Wei Chen

Corresponding Author

Wei Chen

National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072 China

E-mail: chenwei@tju.edu.cn

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First published: 01 December 2020
Citations: 5

Abstract

Two theoretical methods, self-consistent Nývlt-like approach and Sangwal's classical 3D nucleation theory-based method, are employed to analyze the effects of additives (sodium sulfate) on the nucleation behavior of taurine. By correlating the measured metastable zone width of taurine containing different sodium sulfate concentrations, with saturation temperature and cooling rate, nucleation kinetic parameters in both two methods are determined. Fitting results demonstrate that higher sodium sulfate concentration results in the increase of solid–liquid interfacial energy γ, contrarily higher saturation temperature has the opposite effect thus changing of nucleation rate. The molecular modeling techniques are then applied to investigate the changes in the morphology of taurine which caused by the presence of sodium sulfate. Through molecular dynamic simulations, the interaction energy of sodium sulfate with taurine crystal faces are obviously larger than those of taurine and these differences on the (011) and (11-1) are more significant than those on (021) and (111) faces. As a result, the growth of (011) and (11-1) faces is inhibited and the morphology of taurine crystal is modified from needle to columnar. The influence of sodium sulfate on taurine studied in this work provides theoretical guidance for industrial production.

Conflict of Interest

The authors declare no conflict of interest.

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