Metal regeneration of iron chelates in nitric oxide scrubbing

Chang, Shih-Ger; Littlejohn, David; Shi, Yao

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Title: Metal regeneration of iron chelates in nitric oxide scrubbing

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Abstract

The present invention relates to a process of using metal particles to reduce NO to NH.sub.3. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20.degree. and 90.degree. C. to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution.

Inventors:

Chang, Shih-Ger ^[1]; Littlejohn, David ^[2]; Shi, Yao ^[3]

El Cerrito, CA
Oakland, CA
Berkeley, CA

Issue Date:: Tue Aug 19 00:00:00 EDT 1997

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 871100

Patent Number(s):: 5658545

Assignee:: Regents of California (Oakland, CA)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01C - AMMONIA

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D53/56 - Nitrogen oxides
B01D53/96 - Regeneration, reactivation or recycling of reactants

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01C - AMMONIA
C01C1/04 - Preparation of ammonia by synthesis {in the gas phase}

C - CHEMISTRY C21 - METALLURGY OF IRON C21B - MANUFACTURE OF IRON OR STEEL
C21B3/04 - Recovery of by-products, e.g. slag

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P10/143 - Methane [CH4]
Y02P10/20 - Process efficiency

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
Y02W30/50 - Reuse, recycling or recovery technologies

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DOE Contract Number:: AC03-76SF00098

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: metal; regeneration; iron; chelates; nitric; oxide; scrubbing; relates; process; particles; reduce; nh; specifically; concerns; improved; regenerate; ii; chelate; reduction; complex; comprises; contacting; aqueous; solution; containing; 20; degree; 90; produce; ammonia; ammonium; free; ph; useful; remove; flue; gas; pollution; metal particle; improved process; metal particles; solution containing; aqueous solution; process comprises; flue gas; nitric oxide; containing iron; iron chelate; /423/

Citation Formats


                    Chang, Shih-Ger, Littlejohn, David, and Shi, Yao. Metal regeneration of iron chelates in nitric oxide scrubbing.  United States: N. p., 1997. 
        Web.

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                    Chang, Shih-Ger, Littlejohn, David, & Shi, Yao. Metal regeneration of iron chelates in nitric oxide scrubbing.  United States.

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                    Chang, Shih-Ger, Littlejohn, David, and Shi, Yao. Tue .  
        "Metal regeneration of iron chelates in nitric oxide scrubbing".  United States.  https://www.osti.gov/servlets/purl/871100.

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@article{osti_871100,

  title        = {Metal regeneration of iron chelates in nitric oxide scrubbing},

  author       = {Chang, Shih-Ger and Littlejohn, David and Shi, Yao},

  abstractNote = {The present invention relates to a process of using metal particles to reduce NO to NH.sub.3. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20.degree. and 90.degree. C. to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Aug 19 00:00:00 EDT 1997},

  month        = {Tue Aug 19 00:00:00 EDT 1997}

}

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Metal regeneration of iron chelates in nitric oxide scrubbing

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The present invention relates to a process of using metal particles to reduce NO to NH{sub 3}. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: (a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20 and 90 C to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution. 34more » figs. « less
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