Catalyst-containing microflow reactor

The high surface-to-volume ratio inherent in microspace is advantageous for catalyst loading. Therefore, many microflow reactors containing a catalyst bound to the surface of the wall have been developed. Early examples involve the loading of a palladium catalyst on the alumina surface of the channels fabricated on the aluminum platform. Although there are many types of catalyst-containing microflow reactors, only a few types are discussed here. 

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Figure 7.27 Microflow reactor containing supported catalyst...

Another successful application of [BMIMJIPFe] ionic liquid supported catalytic microflow reactions for Pd-catalyzed carbonylative Sonogasnira coupling of aryl iodides and phenylacetylene was reported by Rahman et al. (2006). Ionic liquid containing Pd catalysts, CO and the substrates were mixed successively, in different micromixers (channel diameter = 1 and 0.40 mm), and then pumped as a multiphase (ionic liquid-substrate-CO) into heated capillary tube reactor acting as a residence time unit (V=14.1 mL). It was found that Pd-catalyzed production of solely the acetylenic ketones in ionic liquids, when conducted in conjunction with a microreactor, preceded efficiently with superior selectivity and higher yields compared to the conventional batch system, even at low CO pressures. Authors suggested that this improvement in selectivity and yield was the result of a large interfacial... 

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