SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (1): 196-206.DOI: 10.1016/j.cjche.2017.03.007

• Materials and Product Engineering • 上一篇    下一篇

Comparative experimental study on reactive crystallization of Ni(OH)2 in an airlift-loop reactor and a stirred reactor

Tianrong Cao1,3, Weipeng Zhang1,2, Jingcai Cheng1, Chao Yang1,3   

  1. 1 Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 Nanjing Jiuzhang Chemical Technology Co. Ltd., Nanjing 21180, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2017-01-20 修回日期:2017-03-08 出版日期:2018-01-28 发布日期:2018-03-01
  • 通讯作者: Weipeng Zhang,E-mail addresses:wpzhang@ipe.ac.cn;Chao Yang,E-mail addresses:chaoyang@ipe.ac.cn
  • 基金资助:

    Supported by the National Key Research and Development Program (2016YFB0301701), the National Natural Science Foundation of China (21406236, 91434126), the Major National Scientific Instrument Development Project (21427814) and Jiangsu National Synergetic Innovation Center for Advanced Materials.

Comparative experimental study on reactive crystallization of Ni(OH)2 in an airlift-loop reactor and a stirred reactor

Tianrong Cao1,3, Weipeng Zhang1,2, Jingcai Cheng1, Chao Yang1,3   

  1. 1 Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 Nanjing Jiuzhang Chemical Technology Co. Ltd., Nanjing 21180, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-01-20 Revised:2017-03-08 Online:2018-01-28 Published:2018-03-01
  • Contact: Weipeng Zhang,E-mail addresses:wpzhang@ipe.ac.cn;Chao Yang,E-mail addresses:chaoyang@ipe.ac.cn
  • Supported by:

    Supported by the National Key Research and Development Program (2016YFB0301701), the National Natural Science Foundation of China (21406236, 91434126), the Major National Scientific Instrument Development Project (21427814) and Jiangsu National Synergetic Innovation Center for Advanced Materials.

摘要: The objective of this work is to study the reactive crystallization in an airlift-loop reactor (ALR) using the precipitation of Ni(OH)2 as a model reaction. The growth of Ni(OH)2 particles in an ALR and a stirred tank was quantified by scanning electronic microscope (SEM), X-ray diffraction (XRD), laser particle analyzer, tap densitometer and optical microscope, and the growth process of Ni(OH)2 particles is analyzed. It is found that the Ni(OH)2 particles prepared in an ALR have a better sphericity than those in a stirred tank and the growth of Ni(OH)2 particle tap density mainly depends on the size of crystallites:the bigger the size of crystallites, the bigger the tap density is. Based on these, the growth process of Ni(OH)2 particles in ALR is elaborated. Crystallites precipitated from solution aggregate to form large particles with much void. These constituting crystallites continue to grow up, that takes up the void inside particles and makes the tap density increase.

关键词: Reactive crystallization, Airlift-loop reactor, Nickel hydroxide, Aggregation

Abstract: The objective of this work is to study the reactive crystallization in an airlift-loop reactor (ALR) using the precipitation of Ni(OH)2 as a model reaction. The growth of Ni(OH)2 particles in an ALR and a stirred tank was quantified by scanning electronic microscope (SEM), X-ray diffraction (XRD), laser particle analyzer, tap densitometer and optical microscope, and the growth process of Ni(OH)2 particles is analyzed. It is found that the Ni(OH)2 particles prepared in an ALR have a better sphericity than those in a stirred tank and the growth of Ni(OH)2 particle tap density mainly depends on the size of crystallites:the bigger the size of crystallites, the bigger the tap density is. Based on these, the growth process of Ni(OH)2 particles in ALR is elaborated. Crystallites precipitated from solution aggregate to form large particles with much void. These constituting crystallites continue to grow up, that takes up the void inside particles and makes the tap density increase.

Key words: Reactive crystallization, Airlift-loop reactor, Nickel hydroxide, Aggregation