Development of novel micro swirl mixer for producing fine metal oxide nanoparticles by continuous supercritical hydrothermal method.

摘要: Novel micro swirl mixers were developed to synthesize nanoparticles, and the effect of their mixing performance on characteristics synthesized nanoparticles was determined. The results compared with those obtained using simple T-shaped under same reaction conditions. synthesis NiO, whose depend mixer, chosen as a model reaction. Initial investigations highlighted that average particle size decreased from 32 23 20 nm inner diameter 3.2 mm (Swirl SM-3.2) 0.8 (Micro MSM-0.8) 0.5 MSM-0.5), respectively. On other hand, similar decrease in 34 observed 1.3 (Tee union, T-1.3) 0.3 tee T-0.3), Further, narrow distributions each mixer. Furthermore, computational fluid dynamics (CFD) simulation indicated an excellent mechanism, which contributed improvement heating rate formation smaller distribution. result presented here indicates produce high-quality metal oxide nanoparticles. particles improved comparable mixers, although larger. Therefore, preliminary evidence suggests flow have ability rapid homogeneous mixing, thus controlling size.