Capture of mercury from a gaseous mixture containing mercury

Details Capture of mercury from a gaseous mixture containing mercury Capture of mercury from a gaseous mixture containing mercury

B - Operations, Transporting

01

D

B01D 53/64 (2006.01) B01D 53/86 (2006.01)

Patent

CA 2627503

Compositions are provided, derived from chemical treatment of carbonaceous fiber felt forms or other carbonaceous substrates, that exhibit both high efficiency and capacity for mercury capture from flue gases and the like. These compositions are superior t.o known compositions, particularly with regard to their performance under severely deactivating conditions. The compositions result from the pyrolysis of certain specific sulfur bearing compounds while in contact with activated carbon powders, activated carbon fibers, or with other carbonized forms. Precursor compounds to these novel mercury-binding compositions contain structural moieties that may be represented as: where X, Y are individual atoms or are functional groups consisting of several atoms, such that the atom bonding to sulfur is not hydrogen. X and Y can be linked in cyclic structures, either directly or through other atoms .

L~invention concerne des compositions issues du traitement chimique de fibres carbonées sous forme de feutre ou d~autres substrats carbonés, lesdites compositions présentant à la fois une grande efficacité et une grande capacité de capture de mercure à partir de gaz de combustion et analogues. Ces compositions présentent de meilleures propriétés que les compositions connues, notamment en ce qui concerne leur performance en conditions extrêmement désactivantes. Les compositions résultent de la pyrolyse de certains composés spécifiques porteurs de soufre lors d~un contact avec des poudres de charbon actif, des fibres de charbon actif, ou d~autres formes carbonées. Des composés précurseurs de ces nouvelles compositions se liant au mercure contiennent des fonctions structurales pouvant être représentées par : X, Y étant des atomes individuels ou des groupes fonctionnels composés de plusieurs atomes, de manière à ce que l~atome lié au soufre ne soit pas l~hydrogène. X et Y peuvent être liés dans des structures cycliques, soit de manière directe, soit par d~autres atomes.

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