Gas-solid contacting method

Details Gas-solid contacting method Gas-solid contacting method

1994-10-03

1997-08-19

Bos, Steven

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423210, 423240S, 42324401, 42324407, 95131, B01D 5350, B01D 5368

Patent

active

056585446

ABSTRACT:
A process for removing a carbon dioxide, HF or sulfur dioxide contaminant from an exhaust gas stream containing that contaminant comprising providing a gas stream to a reaction zone, the gas stream entering the reaction zone from underneath and being caused to flow through the reaction zone with components of velocity in substantially upwards and circumferential directions; contacting the gas stream in the reaction zone with particulate material to adsorb the contaminant on the particulate material, wherein the flow of gas in the reaction zone causes a dispersed toroidal bed of particulate material to be formed in the reaction zone; the slip velocity of the gas stream relative to the particulate material in the toroidal bed is greater than 1 m/s; and entraining a fine fraction of the particulate material in the gas stream whereby the fine fraction is removed from the toroidal bed by the gas stream exiting the bed; and separately recovering a coarse fraction of the particulate material from the reaction zone.

REFERENCES:
patent: 3760565 (1973-09-01), Fish
patent: 4176019 (1979-11-01), Dethloff

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