Experimental investigation of nanoparticles precipitation in a rotating packed bed--颗粒学报PARTICUOLOGY

Yang, X., Chu, G., Wen, L., Yang, K., Xiao, G., & Chen, J. (2010). Experimental investigation of nanoparticles precipitation in a rotating packed bed. Particuology, 8(4), 372-378. https://doi.org/10.1016/j.partic.2010.05.008

Experimental investigation of nanoparticles precipitation in a rotating packed bed

Yang Xiang, Guangwen Chu, Lixiong Wen, Kuang Yang, Guangting Xiao, Jianfeng Chen^*

Key Laboratory for Nanomaterials, Ministry of Education, and Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China

10.1016/j.partic.2010.05.008

Volume 8, Issue 4, August 2010, Pages 372-378

Received 25 August 2009, Accepted 19 May 2010, Available online 3 July 2010.

E-mail: chenjf@mail.buct.edu.cn

Highlights

Abstract

Precipitation of BaSO₄ nanoparticles was studied for the first time in a specially designed rotating packed bed (RPB), which allowed sampling at different radial positions to provide better insight of the mechanism of precipitation in RPB. Particle size and morphology were characterized by TEM, while the quality of synthesized BaSO₄ powders was analyzed by XRD and BET, and compared with those prepared in a stirred-tank reactor. The important role of the inlet region of the RPB in the whole precipitation process was experimentally confirmed, as a significant essence for the design of industrial RPB for the precipitation of sparingly soluble materials. The effects of different operating conditions on particle size were also investigated, showing that particle size decreases with increasing rotational speed and liquid flow rate, due to the enhancement of micromixing in the RPB.

Graphical abstract

Keywords

Rotating packing bed；BaSO₄；Nanoparticle Precipitation; Mixing

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