Plug-flow reactor with recirculating stream
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What is the purpose of adding a loop from the outlet material of the plug-flow reactor back to the inlet? Since the residence time is short and cycles are added to change the conversion rate, then why not reduce the feed flow rate to increase the residence time and thus boost the conversion rate?
The design of circulating the outlet material of the plug-flow reactor back to the inlet is primarily aimed at improving the efficiency and conversion rate of the reactor, as well as accelerating the mixing of the reaction materials and the reaction rate. Through cyclic reflux, the reaction materials are given more opportunities to react, further increasing the reaction conversion rate. Although reducing the feed flow rate can also increase the residence time and conversion rate, this approach is relatively inflexible, as in actual production processes it may be necessary to adjust the reaction conditions quickly or change the ratio of reactants; in such cases, increasing the recycle flow is more convenient and effective. Furthermore, excessively reducing the feed flow rate may also affect the reactor’s capacity and production efficiency. .