Stacked reactors

Reactor 2 [R 2] Steel Multi-plate-stack Reactor with Micro Mixer... 

Figure 3.4 Magnified view inside a steel multi-plate-stack reactor.

Reactor 3 [R 3] Modular Multi-plate-stack Reactor... 

Figure 3.5 Schematic of the modular multi-plate-stack reactor [43. ...

Figure 3.6 Multi-plate-stack reactor with diffusers.

Figure 3.11 Photograph of the multi-plate stack reactor, originally designed as a counter-flow heat exchanger this type of reactor was also used for periodic operation [13].

CCR Platforming [Continuous Catalyst Regeneration] A development of the Platforming process in which the catalyst is moved continuously through the stacked reactors into a catalyst regeneration section. Developed by UOP in 1970. 

In fluidized beds, the temperature is uniform within a few degrees even in the largest vessels, but variation of comnposition is appreciable in large vessels, and is not well correlated for design purposes. One currently successful moving bed process is the UOP "Stacked Reactor" platforming where the catalyst is transported and regenerated in a separate zone. When the activity of the catalyst declines fairly rapidly, its variation with time and position must be taken into account by the mathematical formulation. 

Figure 2.88 CO conversion found for low-temperature water-gas shift at various reaction temperature vs. modified residence time (catalyst weight/carbon monoxide flow). Results from a micro channel stack reactor (closed symbols) are compared with conventional cordierite monoliths (open symbols) [82].

Additionally, thin-film layers of the catalyst may be deposited on to the surface of the micro channels by sputtering [73] or CVD [63], In the latter case, aluminum isopropoxide, Al[(CH3)2CHO]3, was used as alumina precursor, which was passed through a ready-stacked reactor at 300 °C for 1 h in a flow containing nitrogen and oxygen in addition. The flow direction was subsequently changed and the procedure repeated. 

Fig. 18.18. Catalytic reforming—UOP LLC. Includes stacked reactor(s) and regenerator with product separation (Source Hydrocarbon Processing, 2004 Refining Process Handbook. CD-ROM. September 2004 copyright 2004 by Gulf Publishing Co., all rights reserved.)...

Modular multi-plate stack reactor [46-48] This modular reactor concept was developed for flexibility, ease of handling and fast change of parameters. It contains five assembly groups, which are microstruc-tured platelets, a cylindrical inner housing, two diffusers and a cylindrical outer shell with a flange. The reactor module can be equipped with a fixed-bed catalyst or with a stack of microstructured wafers... 

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