Experimental investigation and process intensification of barium sulfate nanoparticles synthesis via a new double coaxial spinning disks reactor

Publication date: Available online 22 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Hamed Bagheri Farahani, Mohammad Shahrokhi, Asghar Molaei Dehkordi In this article, a new double spinning disks reactor (DSDR) has been proposed and tested successfully for the synthesis of barium sulfate nanoparticles by means of the reactive precipitation. The proposed DSDR consists of two coaxial rotating disks placed horizontally in a cylindrical chamber. Continuous precipitation of barium sulfate nanoparticles as a chemical test system was carried out using this new contacting device and the effects of operating and design parameters such as the disk rotational speed, distance between the disks, feed concentration, feed flow rate, free ion ratio, feed location, and feed distribution pattern on the mean size, size distribution, and morphology of the synthesized barium sulfate nanoparticles were investigated. It was found that the micromixing enhancement obtained by the new DSDR leads to a better performance for the synthesis of nanoparticles with desired mean size and particle size distribution (PSD). Moreover, BaSO4 nanoparticles with the mean size of 23.4nm were synthesized. Graphical abstract
Source: Chemical Engineering and Processing: Process Intensification - Category: Chemistry Source Type: research