Polymeric hollow fiber membrane for cooling crystallization seeding: On the mechanism of induced nucleation based on thermal transfer--颗粒学报PARTICUOLOGY

He, Z., Du, S., Shao, G., Li, P., Sheng, L., He, G., . . . Xiao, W. (2024). Polymeric hollow fiber membrane for cooling crystallization seeding: On the mechanism of induced nucleation based on thermal transfer. Particuology, 91, 38-49. https://doi.org/10.1016/j.partic.2023.12.014

Polymeric hollow fiber membrane for cooling crystallization seeding: On the mechanism of induced nucleation based on thermal transfer

Zeman He¹, Shaofu Du¹, Guanying Shao, Peiyu Li, Lei Sheng, Gaohong He, Xiaobin Jiang^*, Wu Xiao^*

State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Engineering Laboratory for Petrochemical Energy-efficient Separation Technology of Liaoning Province, Dalian University of Technology, Dalian 116024, China

10.1016/j.partic.2023.12.014

Volume 91, August 2024, Pages 38-49

Received 23 September 2023, Revised 2 December 2023, Accepted 20 December 2023, Available online 4 January 2024, Version of Record 24 January 2024.

E-mail: xbjiang@dlut.edu.cn; wuxiao@dlut.edu.cn

Highlights

• The heat transfer model is combined with an improved fractal theory.

• Membrane modules exhibited a larger and more adjustable total heat transfer coefficient.

• Membrane interfaces could significantly shorten the nucleation induction period.

• The adjustable membrane property enabled the cooling crystallization process to produce the desired crystal products.

Abstract

Cooling crystallization is an important separation process and particuology technology that requires accurate nucleation control strategies. Herein, we introduced the polymeric hollow fiber membrane with proper thermal properties as the effective nucleation induction interface during cooling crystallization. The heterogeneous nucleation control mechanism was introduced based on classical nucleation theory and the thermal transfer process. Interfacial properties and the thermal conductivity of two kinds of polymeric membranes, polytetrafluoroethylene (PTFE) and polyethersulfone (PES), were measured and simulated with the developed model. These two membranes possessed different nucleation induction periods, nucleation rates and crystallization performances, which validated that the hollow fiber membrane module could effectively accelerate the nucleation process compared to conventional cooling crystallization owing to the shorter nucleation induction period and the reduced solution surface tension. Due to the higher hydrophobicity and the lower roughness of the membrane surface, the PTFE membrane possessed a more moderate performance in generating stable heterogeneous nucleation than the one of PES membrane. Thus, the adjustable membrane property enabled the hollow fiber membrane-assisted cooling crystallization to possess the accurate nucleation control and desired terminal particle products.

Graphical abstract

Keywords

Cooling crystallization; Nucleation; Particle process; Hollow fiber membrane; Induction period; Process control

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