Song Fang Wu

US Patent:

6979430, Dec 27, 2005

Filed:

Dec 18, 2002

Appl. No.:

10/321473

Inventors:

Zhen Fan - Parsippany NJ, US
Song Wu - Livingston NJ, US

Assignee:

Foster Wheeler Energy Corporation - Clinton NJ

International Classification:

B01J008/00
C01B021/00
C01K001/32

US Classification:

4232391, 423247

Abstract:

A system and a method for controlling NOemissions from a boiler that combusts carbonaceous fuels. The method includes the steps of (a) introducing carbonaceous fuel and combustion air into a furnace of the boiler for combusting the carbonaceous fuel in oxidizing conditions and producing flue gas including NOand CO, and (b) leading flue gas from the furnace to a catalyst section in a flue gas channel for converting, free from introducing an external agent for NOreduction, NOto Nand CO to COby using CO as the reductant of NOon a catalyst in the catalyst section.

US Patent:

7776141, Aug 17, 2010

Filed:

Sep 25, 2007

Appl. No.:

11/861245

Inventors:

Song Wu - Livingston NJ, US
Takanori Nakamoto - Kurc, JP
Takashi Muramoto - Kurc, JP
Udo Zirn - Morristown NJ, US
Toshio Katsube - Kurc, JP
Hirofumi Kikkawa - Hiroshima, JP

Assignee:

Hitachi Power Systems America, Ltd. - Basking Ridge NJ

International Classification:

B01D 53/06
B01D 53/50

US Classification:

96150, 110203

Abstract:

Methods and apparatus for pollution control which are well suited for use in a coal power plant are described. Ash is collected and injected into the flue gas stream at a location upstream of a cooling module. The ash acts as an absorbent and/or reactant material onto which condensate may condense. By re-introducing ash to keep the condensation forming wet areas within the system, lower cost materials which are less corrosion resistant than needed for wet operating conditions can be used. Mercury recovery and SO3 removal is facilitated by the cooling process and re-introduction of collected ash. Activated carbon and/or an alkali absorbent material may be added. Use of a dry ESP and/or fabric filter as opposed to a wet ESP for particulate collection leads to cost benefits. Energy recovered by the cooling of the flue gas may be re-used to heat turbine condensate leading to improved energy efficiency.

US Patent:

20070149394, Jun 28, 2007

Filed:

Dec 22, 2005

Appl. No.:

11/313805

Inventors:

Zhen Fan - Parsippany NJ, US
Song Wu - Livingston NJ, US
Richard Herman - Whitehall PA, US

Assignee:

FOSTER WHEELER ENERGY CORPORATION - Clinton NJ

International Classification:

B01J 23/10
B01D 53/86
B01J 23/00

US Classification:

502304000, 423239100

Abstract:

A catalyst, a method of and an arrangement for using a catalyst for controlling NO and/or CO emissions from a combustion system that combusts carbonaceous fuels, including introducing carbonaceous fuel and combustion air into a furnace of the combustion system for combusting the carbonaceous fuel in oxidizing conditions and producing flue gas that includes NO and/or CO, wherein the ratio of molar concentrations of CO and NOis preferably at least 0.7, and leading flue gas from the furnace to contact with a catalyst in a flue gas channel, wherein the catalyst has a metal oxide loading comprising oxides of iron and and one or more of a group consisting of copper, cerium and potassium, deposited on a porous support material, wherein the metal oxide loading is preferably 1-20% of the weight of the support material and ratio of the weight of oxides the group consisting of copper, cerium and potassium to the weight of iron oxides is preferably from 0.25 to 3, for converting, free from introducing an external agent for NO reduction, NO to N, by using CO as the reductant of NO, and/or CO to CO.

US Patent:

20070160517, Jul 12, 2007

Filed:

Sep 6, 2006

Appl. No.:

11/515748

Inventors:

Zhen Fan - Parsippany NJ, US
Song Wu - Livingston NJ, US
Richard G. Herman - Whitehall PA, US

Assignee:

FOSTER WHEELER ENERGY CORPORATION - Clinton NJ

International Classification:

B01D 53/64
B01D 53/46
B01D 47/00
B01D 53/94

US Classification:

423210, 4232132

Abstract:

A catalyst, a method of and an arrangement for using a catalyst for controlling NO and/or CO emissions from a combustion system that combusts carbonaceous fuels, including introducing carbonaceous fuel and combustion air into a furnace of the combustion system for combusting the carbonaceous fuel in oxidizing conditions and producing flue gas that includes NO and/or CO, wherein the ratio of molar concentrations of CO and NOis preferably at least 0.7, and leading flue gas from the furnace to contact with a catalyst in a flue gas channel, wherein the catalyst has a metal oxide loading comprising oxides of iron and one or more of a group consisting of copper, cerium and potassium, deposited on a porous support material, wherein the metal oxide loading is preferably 1-20% of the weight of the support material and ratio of the weight of oxides the group consisting of copper, cerium and potassium to the weight of iron oxides is preferably from 0.25 to 3, for converting, free from introducing an external agent for NO reduction, NO to N, by using CO as the reductant of NO, and/or CO to CO.