Metal regeneration of iron chelates in nitric oxide scrubbing

Patent · Tue Aug 19 00:00:00 EDT 1997

OSTI ID:871100

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

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1. El Cerrito, CA
2. Oakland, CA
3. Berkeley, CA

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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
• Sponsoring Organization: United States Department of Energy
• DOE Contract Number: AC03-76SF00098
• Assignee: Regents of California (Oakland, CA)
• Patent Number(s): US 5658545
• OSTI ID: 871100
• Country of Publication: United States
• Language: English

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