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

2005-11-09

2011-10-11

Hendrickson, Stuart (Department: 1736)

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

Free carbon containing

Reexamination Certificate

active

08034741

ABSTRACT:
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 to 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.

REFERENCES:
patent: 4500327 (1985-02-01), Nishino et al.
patent: 5352647 (1994-10-01), Suchenwirth
patent: 6322613 (2001-11-01), Wojtowicz

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