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The intensification of rapid reactions for multiphase systems in a microchannel reactor by packing microparticles
Author(s) -
Su Yuanhai,
Zhao Yuchao,
Jiao Fengjun,
Chen Guangwen,
Yuan Quan
Publication year - 2011
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12367
Subject(s) - microchannel , microreactor , packed bed , mass transfer , residence time (fluid dynamics) , nitration , chemistry , chemical reactor , chemical engineering , materials science , analytical chemistry (journal) , chromatography , catalysis , nanotechnology , organic chemistry , engineering , geotechnical engineering
In this study, the nitration of o‐nitrotoluene (NT) with mixed acid as a model fast liquid–liquid multiphase reaction was conducted in the packed and nonpacked microchannel reactors. Better reaction performance could be obtained in the packed microchannel reactor compared with the nonpacked microchannel reactor because of its excellent mass transfer performance. The conversion of NT reached 94% in the packed microchannel reactor even when the reaction time was less than 3 s. A parameter, which represented the coupling of mass transfer and residence time in microdevices, was proposed for explaining and anticipating nitration process in microchannel reactors. In addition, the effects of some operating parameters on reaction performance, such as the composition of mixed acid and reaction temperature, were also investigated experimentally. © 2010 American Institute of Chemical Engineers AIChE J, 2011