Publication Date:
2013-02-07
Description:
The effect of solid particles on micromixing has been studied using the competitive iodide/iodate reaction system in stirred, multi-impeller, solid-liquid systems. The influences of particle size, impeller speed, solid holdup, feed position, and energy input have been investigated. The change of the segregation index with the power input was more distinguishable only for the 450–600 μm particles as compared with the large ones, at the same solid holdups. Also, for the small ones, cloud formation was observed at a particle concentration of 12.1 wt %. However, the influence of larger particles of 1–1.25 mm on micromixing was negligible, though both energy input and solid loading were increased. Besides, the optimal feed position was identified, and multiple feeds were also explored. The effect of two sizes of glass beads on micromixing has been investigated using the competitive iodide/iodate reaction system. Different feeding locations and its relation with the total energy dissipation have been explored. Experimental results showed that the presence of the particles could have a negative effect on micromixing. Also, distributed feeding of reactants is beneficial to the overall selectivity towards the desired products.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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