化工学报 ›› 2022, Vol. 73 ›› Issue (6): 2318-2333.DOI: 10.11949/0438-1157.20220159

• 综述与专论 • 上一篇    下一篇

溶液结晶中的介尺度成核过程研究进展

汪帆1(),刘岩博1,李康丽2,童丽2,金美堂2,汤伟伟1,陈明洋1,2(),龚俊波1,2,3()   

  1. 1.天津大学化工学院化学工程联合国家重点实验室,天津 300072
    2.天津大学浙江绍兴研究院,浙江 绍兴 312300
    3.化学与化学工程广东实验室,广东 汕头 515031
  • 收稿日期:2022-02-07 修回日期:2022-03-09 出版日期:2022-06-05 发布日期:2022-06-30
  • 通讯作者: 陈明洋,龚俊波
  • 作者简介:汪帆(1999—),男,硕士研究生, fanwangworkharder@tju.edu.cn
  • 基金资助:
    国家自然科学基金项目(22108195);化学与化学工程广东实验室项目(1912014)

Research progress on mesoscale nucleation process in solution crystallization

Fan WANG1(),Yanbo LIU1,Kangli LI2,Li TONG2,Meitang JIN2,Weiwei TANG1,Mingyang CHEN1,2(),Junbo GONG1,2,3()   

  1. 1.State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    2.Tianjin University Research Institute of Zhejiang Shaoxing, Shaoxing 312300, Zhejiang, China
    3.Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, Guangdong, China
  • Received:2022-02-07 Revised:2022-03-09 Online:2022-06-05 Published:2022-06-30
  • Contact: Mingyang CHEN,Junbo GONG

摘要:

成核作为溶液结晶的第一步,是决定晶体产品质量的关键因素。目前,成核理论主要包括经典成核理论和非经典成核理论。相比于仅以原子、离子或分子等均匀稳定结构为单元的经典成核理论,非经典成核理论以纳米级前聚体为单元,这类单元涵盖了聚集体、纳米粒子等介尺度非均匀动态结构,导致形成的非经典成核过程更为复杂,需在传统的化学、化学工程和过程系统工程研究方法的基础上,充分利用介尺度科学研究方法完成其核心规律的探究。为此,总结了二步成核理论、预成核团簇理论、粒子附着晶化理论以及其他新提出的非经典成核理论,分析了其中的介尺度结构及其时空动态行为,并探讨了利用介尺度数学模型对现有成核数学模型的修正和优化的思路,最后对溶液结晶中晶体成核的介尺度研究范式及理论发展进行了展望。

关键词: 成核, 介尺度, 前聚体, EMMS模型, 两相流, 虚拟过程工程

Abstract:

Nucleation, as the first step in solution crystallization, is a key factor in determining the quality of crystalline products. Nucleation theory mainly includes classical nucleation theory and non-classical nucleation theory. Compared with the classical nucleation theory with uniform and stable structures such as atoms, ions, or molecules as units, non-classical nucleation theories often consider nanoscale precursors as units, such as ion-associated aggregates, nanoparticles and other non-uniform dynamic structures. As a result, the formation of non-classical nucleation processes is more complex. On the basis of traditional research methods of chemistry, chemical engineering and process systems engineering, it is necessary to make full use of mesoscale scientific research methods to complete the exploration of its core laws. This review summarizes the non-classical nucleation theories such as two-step nucleation theory, pre-nucleation cluster theory, and particle attachment crystallization theory, as well as other new theories proposed in recent years, and analyzes the mesoscale structure and its spatiotemporal dynamic behavior, the idea of revising and optimizing the existing nucleation mathematical model with mesoscale mathematical model is discussed, and the mesoscale research paradigm and theoretical development of crystal nucleation in solution crystallization are prospected.

Key words: nucleation, mesoscale, precursor, EMMS model, two-phase flow, virtual process engineering

中图分类号: