Title: Sorbents for the oxidation and removal of mercury

Abstract

A promoted activated carbon sorbent is described that is highly effective for the removal of mercury from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and mercury capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or mercury capture. Mercury removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and control of the active sorbent into the mercury contaminated gas stream are described.

Inventors:

Olson, Edwin S.; Holmes, Michael J.; Pavlish, John Henry

Issue Date:

Tue Sep 02 00:00:00 EDT 2014

Research Org.:

National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1154945

Patent Number(s):

8821819

Application Number:

13/966,768

Assignee:

Energy & Enviromental Research Center Foundation (Grand Forks, ND)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D2253/102 - Carbon
B01D2253/25 - Coated, impregnated or composite adsorbents
B01D2257/602 - Mercury or mercury compounds
B01D2258/0283 - Flue gases
B01D53/10 - with dispersed adsorbents
B01D53/64 - Heavy metals or compounds thereof, e.g. mercury

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J20/02 - comprising inorganic material
B01J20/0262 - {Compounds of O, S, Se, Te}
B01J20/027 - {Compounds of F, Cl, Br, I}
B01J20/04 - comprising compounds of alkali metals, alkaline earth metals or magnesium
B01J20/041 - {Oxides or hydroxides}
B01J20/043 - {Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite}
B01J20/10 - comprising silica or silicate
B01J20/106 - {Perlite}
B01J20/12 - Naturally occurring clays or bleaching earth
B01J20/20 - comprising free carbon
B01J20/22 - comprising organic material
B01J20/223 - {containing metals, e.g. organo-metallic compounds, coordination complexes}
B01J20/28004 - {Sorbent size or size distribution, e.g. particle size}
B01J20/28016 - {Particle form}
B01J20/3416 - {of sorbents or filter aids comprising free carbon, e.g. activated carbon}
B01J2220/42 - Materials comprising a mixture of inorganic materials

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S95/901 - Activated carbon

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DOE Contract Number:  

FC26-98FT40320

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY