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Lookup NU author(s): Dr Somaieh Mohammadi,
Professor Kamelia Boodhoo,
Professor Adam Harvey
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An in-depth study of TiO2 precipitation has been performed on a spinning disc reactor (SDR). Effects of physical parameters such as rotational speed, surface texture and size, and operating parameters such as flowrate, ratio of precursor to water and location of feed introduction points were studied. Samples collected from the disc were subjected to dynamic light scattering (DLS) to quantify the particle sizes and particle size distribution. At higher disc rotational speeds, particles with sizes close to 1 nm and with a narrow particle size distribution (PSD) were formed due to the high disc speeds, the thin films formed on the surface of SDRs experience high mixing intensity and a high degree of plug flow. Smaller particles with a narrower PSD were obtained using the grooved disc texture because the grooved disc is more effective at ensuring plug flow behaviour compared to a smooth disc under the same operating conditions. Smaller particles and narrower particle size distributions were achieved by introducing the titanium tetra isopropoxide (TTIP) precursor into the water film away from the centre which allows better mixing between the two streams.
Author(s): Mohammadi S, Boodhoo KVK, Harvey AP
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: Process Development Division 2013 - Core Programming Area at the 2013 AIChE Annual Meeting: Global Challenges for Engineering a Sustainable Future
Year of Conference: 2013
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