| US 7,556,672 B2 | ||
| Regenerative process for removal of mercury and other heavy metals from gases containing H2 and/or CO | ||
| Raja A. Jadhav, Naperville, Ill. (US) | ||
| Assigned to Gas Technology Institute, Des Plaines, Ill. (US) | ||
| Filed on Feb. 05, 2007, as Appl. No. 11/702,237. | ||
| Prior Publication US 2008/0184884 A1, Aug. 07, 2008 | ||
| Int. Cl. B01D 53/64 (2006.01) | ||
| U.S. Cl. 95—134 [95/148; 96/144; 96/153] | 25 Claims |
| 1. A method for removal of mercury from a gaseous stream comprising said mercury, at least one of molecular hydrogen and carbon
monoxide, and at least one of hydrogen sulfide (H2S) and carbonyl sulfide (COS) comprising the steps of:
contacting a dispersed Cu-containing sorbent with said gaseous stream at a temperature in a range of about 25° C. to about
300° C. until mercury concentration in said gaseous stream subsequent to contacting said sorbent exceeds a predetermined breakthrough
level, forming a spent sorbent comprising sorbed mercury;
contacting said spent sorbent with a substantially mercury- and H2S/COS-free gaseous stream comprising a reducing gas, producing released mercury and a regenerated sorbent; and
capturing said released mercury using a high capacity sorbent at a temperature less than about 100° C.
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