Continuous Synthesis of Barium Sulfate Nanoparticles in a New High-Speed Spinning Disk Reactor

Abstract

A new high-speed spinning disk reactor (HSSDR) was proposed and tested successfully. In this regard, barium sulfate (BaSO 4 ) nanoparticles were synthesized using reactive crystallization processes. In this reactor, the rotational disk speed was varied from 5000 to 15 000 rpm. The effects of various design and operating parameters such as the rotational disk speed, feed entrance radius, volumetric flow rate of feed solutions, supersaturation, and free ion ratio were investigated in detail. The mean particle size (MPS) and specifications of the synthesized barium sulfate were investigated using scanning electron microscopy combined with energy-dispersive X-ray spectroscopy and powder X-ray diffraction. Nanoparticles with smaller MPS and narrower particle size distribution (PSD) were synthesized due to an increased micromixing obtained in the HSSDR. Moreover, BaSO 4 nanoparticles with the MPS of 16.4 nm and PSD of 4−26 nm were synthesized successfully. This clearly shows that the proposed reactor is a promising contacting device in process intensification.

Preparation of Highly Dispersed CaCO3 Nanoparticles in a Novel Membrane Dispersion Microreactor by a Chemical Coprecipitation Process

“…In addition, as the supersaturation value increases, the resulting primary nuclei grow explosively. This result leads to a decrease in MPS for the synthesis of CaCO 3 nanoparticles, and similar results have been observed in the article . Chen’s study shows that the crystal growth of larger particles increases with the crystal size .…”

“…This result leads to a decrease in MPS for the synthesis of CaCO 3 nanoparticles, and similar results have been observed in the article. 28 Chen's study shows that the crystal growth of larger particles increases with the crystal size. 29 This is consistent with the agglomeration of larger-sized particles into rods at low supersaturation.…”

Multiphasic Continuous‐Flow Reactors for Handling Gaseous Reagents in Organic Synthesis: Enhancing Efficiency and Safety in Chemical Processes

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“…[177,178] The handling of solids in spinning disk reactors has been shown to be possible. [179] Moreover, RS-SDRs were demonstrated to allow for the scale-up of gas-liquid reactions. [180] In a recent publication, Noël, Van der Schaaf, and co-workers demonstrated the use of this reactor to handle solid-containing heterogeneous photochemical systems using TiO 2 -mediated aerobic photodegradation of methylene blue.…”

Recent Advances in the Preparation of Barium Sulfate Nanoparticles: A Mini-Review

“…A significant reduction in the average particle size of barium sulfate has been achieved using a new high-speed spinning disk reactor (HSSDR) [117]. Exploiting the high rotational disk speed (from 5000 to 15,000 rpm) yielded particles with an average size of 16.4 nm.…”