Toxic gas absorbent and process for making and using same

Details Toxic gas absorbent and process for making and using same Toxic gas absorbent and process for making and using same

B - Operations, Transporting

01

J

252/33, 23/341

B01J 20/32 (2006.01) B01D 53/34 (2006.01) B01J 20/04 (2006.01)

Patent

CA 1313522

Toxic Gas Absorbent and Process for Making and Using Same Abstract Solid sorbents (acceptors) for noxious components, eg. SOx, NOx and HX, from gases below about 250°, specifically water-containing acceptors that have a divalent metal oxide and/or hydroxide, eg. MgO and/or CaO, coated onto an exfoliated or expanded mineral sup- port, are improved by heating them before use at a tem- perature of 400-650° for a conditioning period of at least a few minutes. So conditioned pulverulent MgO coated onto water-laden exfoliated vermiculite (alter- natively expanded perlite) is preferred because of sorbing capacity and the ability of the magnesia-based acceptors to be regenerated at a moderately elevated temperature that precludes substantial deterioration of acceptor or equipment. To insure immediate activity the conditioned acceptor is moistened for use. Advantageously the gas and/or the acceptor is humidifed during their contact.

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