Packed bed reactor

Packed bed reactor

1. Kanchan Ramteke MT17MCL011 Packed Bed Reactor

2. Introduction Packed bed reactor (Fixed bed reactor) consists of cylinder of large diameter with multiple catalyst bed or many tubes in parallel packed with catalyst and encased in large shell.

3. Gas flows continuously through a stationary bed of catalyst. Use of relatively large size catalyst particles for low pressure drop. Catalyst particles:- Granular Pelleted Cylindrical or spherical

4. Theory Packing is used to provide a good contact between the contacting phase . Packed bed reactor most often used to catalyze gas reactions. The chemical reaction takes place on the surface of the catalyst . The advantage of using a  packed bed reactor  is the higher conversion per weight of catalyst than other catalytic  reactors . Packed beds of solid particles are also used in absorption, adsorption, and distillation columns to increase interfacial area of contact between gas and liquid .

5. Catalyst regeneration is a serious problem. Operation is not practically isothermal. No carry over of catalyst particles thus does not require recovery units. Cannot use very small size catalyst particles due to plugging and high pressure drop. Uses relatively large size particles for low pressure drop. Key points

6. Design Equation

7. Design Equation

8. Application Absorption I on exchange Distillation H umidification etc . Waste water treatment

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