An insight into the intensification of aqueous/organic phase reaction by the addition of magnetic polymer nanoparticles
writer：Ren Jing, Jun Tang, Qi Zhang, Liang Chen, Dengxiang Ji, Fengwen Yu, Meizhen Lu, Jianbing Ji, Jianli
keywords：Montanari oxidation，TEMPO，magnetic polymer nanoparticles， intensification，heterogeneous reaction， mass transfer
source：期刊
Issue time：2015年
The intensification mechanism of aqueous/organic
phase reaction by the addition of magnetic
polymer nanoparticles was investigated. To understand
how nanoparticles intensify the liquid-liquid (L-L)
reaction, three reaction enhancement
strategies of mechanical agitation (MA), the addition of magnetic
polymer nanoparticles (MPN) or phase transfer catalyst (PTC) were
compared in Montanari oxidation system. A mass transfer mathematical model was established
to describe the oxidation reaction process owing to its inherently fast
characteristic of the oxidation of selected substrate (benzyl alcohol).
Moreover, the influence of the nanoparticles concentration on the biphasic
reaction was explored. The results indicate that the emulsification of
nanoparticles is the main reason to intensify the L-L reaction, and the mass
transfer specific surface area (aow)
is a crucial factor to accelerate the reaction rate. In addition, the emulsion
type also plays a significant role to influence the overall mass transfer
coefficient (K) of substrate.