Design spherical particles of potassium peroxymonosulfate compound salt with high stability and good powder properties via an agglomeration-dissolution mechanism--颗粒学报PARTICUOLOGY

Feng, S., Yu, C., Guo, S., Ouyang, J., Yin, F., Zhang, X., . . . Wang, J. (2023). Design spherical particles of potassium peroxymonosulfate compound salt with high stability and good powder properties via an agglomeration-dissolution mechanism. Particuology, 80, 157-169. https://doi.org/10.1016/j.partic.2022.11.020

Design spherical particles of potassium peroxymonosulfate compound salt with high stability and good powder properties via an agglomeration-dissolution mechanism

Shanshan Feng ^{a 1}, Changyou Yu ^{c 1}, Shilin Guo ^a, Jinbo Ouyang ^d, Fei Yin ^e, Xiaodong Zhang ^e, Yongjian Zhang ^e, Mingyang Chen ^{a c *}, Dandan Han ^a *, Junbo Gong ^{a b c}, Jingkang Wang ^a

a State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
b Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
c Institute of Shaoxing, Tianjin University, Zhejiang, 312300, China
d School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang, 330013, China
e Zhejiang Jinke Daily Chemical Materials Co., Ltd., Zhejiang, 312300, China

10.1016/j.partic.2022.11.020

Volume 80, September 2023, Pages 157-169

Received 28 August 2022, Revised 20 November 2022, Accepted 27 November 2022, Available online 12 December 2022, Version of Record 1 March 2023.

E-mail: chenmingyang@tju.edu.cn; handandan@tju.edu.cn

Highlights

• An agglomeration-dissolution mechanism for spheroidization is proposed.

• The mechanism includes three stages: crystallization, agglomeration and shaping.

• Spherical potassium peroxymonosulfate compound salt was prepared on a large scale.

• Spherical particles of compound salt have high reactive oxygen species stability.

Abstract

With the outbreak of COVID-19, disinfection protection has become a necessary measure to prevent infection. As a new type of disinfectant, potassium peroxymonosulfate compound salt (PMS) has the advantages of good bactericidal effect, non-toxicity, high safety and stability. However, the current PMS products with irregular particle shapes lead to poor flowability, high hygroscopicity, poor stability of reactive oxygen species (ROS) and serious caking problems. In this work, an agglomeration-dissolution mechanism was designed to prepare spherical PMS particles with large size (>300 μm) and high sphericity (up to 90%), effectively addressing the above problems. Shaping (dissolution and abrasion) is the key to improving sphericity, which is mainly controlled by the design of the heating mode, residence time and stirring rate. Compared with the irregular PMS particles, the large spherical particles present better flowability (angle of repose decreased by 35.80%, Carr's index decreased by 64.29%, Hausner's ratio decreased by 19.14%), lower hygroscopicity (decreased by 38.0%), lower caking ratio (decreased by 84.50%), and higher stability (the monthly loss of ROS was reduced by 61.68%). The agglomeration-dissolution mechanism demonstrates the crystallization, agglomeration, dissolution and abrasion process of inorganic salt crystals, providing an opportunity to prepare high-end inorganic crystal materials with high-quality morphologies.

Graphical abstract

Keywords

Potassium peroxymonosulfate compound salt; Spherical crystallization; Agglomeration; Dissolution; Disinfection protection

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