BI-directional control of temperatures in reactant channels

Details BI-directional control of temperatures in reactant channels BI-directional control of temperatures in reactant channels

1994-12-22

1996-07-30

Bhat, Nina

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

422218, 422221, 422201, 422236, 165 2, 16510413, 165113, 165133, 165170, 165182, B01J 802, B01J 804, B01J 812

Patent

active

055408990

ABSTRACT:
A reactor arrangement and process for indirectly contacting a reactant stream with a heat exchange stream uses multiple passes of the heat exchange stream in a transverse flow arrangement to control temperature conditions over the width and length of channels through which the reactant passes. The heat transfer coefficient may be varied by changing the number and/or the arrangement of the corrugations along the plates or adding a heat adjustment plate to a channel containing the heat exchange fluid. The reactor arrangement and process of this invention may be used to operate a reactor under isothermal or other controlled temperature conditions. The variation in corrugation arrangements within a single heat exchange section is highly useful in maintaining a desired temperature profile in an arrangement having a cross-flow of heat exchange medium relative to reactants. The corrugations arrangement eliminates or minimizes the typical step-wise approach to isothermal conditions. Multiple heat exchange fluid inputs are particularly useful in fixed bed process arrangements where the temperature of the heat exchange fluids may be adjusted to suit changes in the activity profile through the bed that results from catalyst deactivation.

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236,072 Girod et al.

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