Characterization of micro-mixing in a novel impinging streams reactor

2009, Volume 3, Issue 1

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Frontiers of Chemical Science and Engineering >> 2009, Volume 3, Issue 1 doi: 10.1007/s11705-009-0106-8

Characterization of micro-mixing in a novel impinging streams reactor

School of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China

Available online: 2009-03-05

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Abstract

This paper presents an experimental investigation of a novel impinging stream reactor (ISR) with the aim of high mixing intensity. The integral mixing quality in the reactor was measured with the iodide-iodate reaction and showed excellent mixing performance. The impact of the operating parameters, such as fluxes, circulation and inter-nozzle distances, was investigated in terms of segregation index. The results showed that the increase of flux, the decrease of inter-nozzle distance and a suitable circulation can improve the micro-mixing efficiency. Based on turbulence theory, it was estimated that the characteristic micro-mixing time was 0.002—0.02 s, which was much shorter than that in the stirred tank reactor. The micro-mixing time was related to the segregation index, which was in good agreement with those in the literature.

Keywords

micro-mixing ; impinging streams reactor ; turbulent mixing ; mass transfer

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