Development Of Novel Multi-channel Micro Stream Reactors And Their Mixing Performance Study

Micro-reactors attracted more and more researchers’ attention because of their advantage of high performance; however, micro-reactor is still rarely used in industry due to its complicated integrated structure and difficulties in manufacturing, detecting and controlling. In this work, two new types of reactors were designed and manufactured to solve the problem of numbering-up for micro-reactors. The main contents are as follows:(1) A new multi-channel micro impinging stream reactor (multi-channel MISR) for high throughput and high flow rate condition was designed and developed, and a novel clustered counter-current flow micro channel reactor (C-CFMCR) for low flow rate condition was also designed and developed.(2) Micro-mixing efficiency in multi-channel MISR was characterized with the Villermaux-Dushman reaction. The micro-mixing efficiency was improved by increasing Reynolds and keeping volume flow ratio as 1:1. The micro-mixing time was ranged from 0.9 to 20 ms by using the incorporation model. The prepared barium sulfate particles with multi-channel MISR had small average particle size and narrow particle size distribution.(3) The micro-mixing efficiency of C-CFMCR was improved by increasing volume flow in a certain Reynolds range; however, excessive flow rate led to degradation of micro-mixing performance. Based on the incorporation model, its micro-mixing time was ranged from 0.32 to 5.69 ms. The barium sulfate particle size was about 20 nm when prepared in C-CFMCR, which was significantly better than the stirred tank reactor.This work proposed new ideas in the field of micro-reactor numbering-up. The multi-channel MISR and C-CFMCR, with high micro-mixing efficiency, will have great potential in industry applications.