Loc Doan Ho

US Patent:

6895875, May 24, 2005

Filed:

Nov 18, 2003

Appl. No.:

10/714939

Inventors:

Vitali Victor Lissianski - San Juan Capistrano CA, US
Peter Martin Maly - Lake Forest CA, US
William Randall Seeker - San Clemente CA, US
Roy Payne - Mission Vierjo CA, US
Vladimir M. Zamansky - Oceanside CA, US
Loc Ho - Sparks NV, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23J015/00

US Classification:

110345, 110344, 423210

Abstract:

A method to reduce mercury in gas emissions from the combustion of coal is disclosed. Mercury emissions can be reduced by staging combustion process and/or reducing boiler excess oxygen. Fly ash formed under combustion staging conditions is more reactive towards mercury than fly ash formed under typical combustion conditions. Reducing boiler excess oxygen can also improve ability of fly ash to adsorb mercury.

US Patent:

6981456, Jan 3, 2006

Filed:

Dec 14, 2004

Appl. No.:

11/010267

Inventors:

Vitali Victor Lissianski - San Juan Capistrano CA, US
Peter Martin Maly - Lake Forest CA, US
William Randall Seeker - San Clemente CA, US
Roy Payne - Mission Vierjo CA, US
Vladimir M. Zamansky - Oceanside CA, US
Loc Ho - Sparks NV, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23J 15/00

US Classification:

110345, 110347

Abstract:

A method to reduce mercury in gas emissions from the combustion of coal is disclosed. Mercury emissions can be reduced by staging combustion process and/or reducing boiler excess oxygen. Fly ash formed under combustion staging conditions is more reactive towards mercury than fly ash formed under typical combustion conditions. Reducing boiler excess oxygen can also improve ability of fly ash to adsorb mercury.

US Patent:

7249564, Jul 31, 2007

Filed:

Jun 14, 2004

Appl. No.:

10/866239

Inventors:

Vitali Victor Lissianski - San Juan Capistrano CA, US
Peter Martin Maly - Lake Forest CA, US
William Randall Seeker - San Clemente CA, US
Loc Ho - Sparks NV, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23J 15/00

US Classification:

110345, 110347, 110203, 95134

Abstract:

A method for capturing mercury in a flue gas formed by solid fuel combustion including: combusting coal, wherein mercury released during combustion is entrained in flue gas generated by the combustion; generating a thermally activated carbon-containing sorbent by partially gasifying a solid fuel in a gasifier local to the combustion of solid fuel; injecting the gasified gas products into the combustion of coal; injecting the thermally activated sorbent in the flue gas, and collecting the injected sorbent in a waste treatment system.

US Patent:

7600479, Oct 13, 2009

Filed:

Sep 29, 2005

Appl. No.:

11/237949

Inventors:

Vitali Victor Lissianski - San Juan Capistrano CA, US
Peter Martin Maly - Lake Forest CA, US
William Randall Seeker - San Clemente CA, US
Roy Payne - Mission Vierjo CA, US
Vladimir M. Zamansky - Oceanside CA, US
Loc Ho - Sparks NV, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23J 11/00

US Classification:

110345, 110204, 95134

Abstract:

A method to reduce mercury in gas emissions from the combustion of coal is disclosed. Mercury emissions can be reduced by staging combustion process and/or reducing boiler excess oxygen. Fly ash formed under combustion staging conditions is more reactive towards mercury than fly ash formed under typical combustion conditions. Reducing boiler excess oxygen can also improve ability of fly ash to adsorb mercury.

US Patent:

56701225, Sep 23, 1997

Filed:

May 23, 1996

Appl. No.:

8/652104

Inventors:

Vladimir M. Zamansky - San Clemente CA
Loc Ho - Anaheim CA
William Randall Seeker - San Clemente CA

Assignee:

Energy and Environmental Research Corporation - Irvine CA

International Classification:

C01B 2100
C01B 1720
C01B 3118
C07C 1124

US Classification:

423210

Abstract:

A method is provided for preventing the release of air pollutants with combustion flue gases emitted to the atmosphere by the removal of one or more of nitric oxide, sulfur trioxide, light hydrocarbons, carbon monoxide, and trace amounts of mercury from combustion flue gas streams. The method converts nitric oxide to nitrogen dioxide, sulfur trioxide to sulfur dioxide, removes light hydrocarbons in the form of carbon dioxide, reduces the concentration of carbon monoxide, and removes mercury vapor in the form of mercury oxide, by the addition of hydrogen peroxide or a mixture of hydrogen peroxide and methanol to a combustion flue gas at a temperature in the range from about 650 K (377. degree. C. ) to 1100 K (827. degree. C. ).

US Patent:

52700259, Dec 14, 1993

Filed:

Mar 25, 1992

Appl. No.:

7/858316

Inventors:

Loc Ho - Anaheim CA
Shih L. Chen - Irvine CA
William R. Seeker - San Clemente CA
Peter M. Maly - El Toro CA

Assignee:

Energy & Environmental Research Corp. - Irvine CA

International Classification:

C01B 2100
C01B 1700
C01B 1720
B01J 800

US Classification:

423235

Abstract:

Method for controlling N. sub. 2 O emissions from stationary combustion systems having variable flue gas temperatures are disclosed. The N. sub. 2 O emissions are controlled by the introduction of a N. sub. 2 O control agent, such as an alkaline compound, into the effluent stream. In addition, the present invention discloses methods for controlling N. sub. 2 O emissions from stationary combustion systems having variable flue gas temperatures while reducing NO. sub. x emissions. Use of an NO. sub. x reducing agent and an N. sub. 2 O control agent, such as urea and monosodium glutamate, enlarges the temperature window for effective selective noncatalytic NO. sub. x reduction while significantly eliminating N. sub. 2 O emissions commonly experienced with urea injection. Further, the present invention discloses methods for controlling N. sub.

US Patent:

51165848, May 26, 1992

Filed:

Apr 5, 1991

Appl. No.:

7/681697

Inventors:

Shih L. Chen - Irvina CA
William R. Seeker - San Clemente CA
Loc Ho - Anaheim CA

Assignee:

Energy and Environmental Research Corporation - Irvine CA

International Classification:

C01B 2100

US Classification:

423235

Abstract:

Methods for reducing NO. sub. x emissions from stationary combustion systems having variable flue gas temperatures are disclosed. Use of an annonium salt of an organic acid enlarges the temperature window for effective selective noncatalytic NO. sub. x reduction thereby accounting for variable flue gas temperatures. Currently preferred ammonium salts of organic acids include ammonium formate, ammonium acetate, and ammonium oxalate. Mixtures of urea and either an ammonium salt of an organic acid or a metallic salt of an organic acid provide an even greater temperature window for NO. sub. x reduction. Currently preferred metallic salts of organic acids include Ca(COOH). sub. 2, Ca(CH. sub. 3 COO). sub. 2, Ca(C. sub. 2 H. sub. 5 COO). sub. 2, Mg(COOH). sub. 2, Mg(CH. sub. 3 COO). sub. 2, and Mg(C. sub. 2 H. sub. 5 COO). sub. 2.