Use of ferrous chelates of SH-containing amino acids and peptides for the removal of NO/sub x/ and SO/sub 2/ from flue gas

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Ind. Eng. Chem. Res.; (United States)

DOI:https://doi.org/10.1021/ie00083a033· OSTI ID:6296442

Chang, S G; Littlejohn, D; Liu, D K

The use of ferrous complexes of SH-containing amino acids and peptides for the removal of NO and SO/sub 2/ in wet flue gas clean-up systems is reported. The ferrous chelates investigated in the present study include those of cysteine, N-acetylcysteine, penicillamine, N-acetylpenicillamine, glutathine, and cysteinylglycine. Compared to conventional chelates such as EDTA, these thioamino acids/peptides not only can stabilize ferrous ion in alkaline solutions to promote the absorption of NO but are also capable of rapidly reducing any ferric ions formed during the scrubbing process back to ferrous ions so that continual absorption of NO can be achieved. In the case of ferrous cysteine and ferrous penicillamine, most of the absorbed NO is reduced to N/sub 2/. The disulfide form of several of the thioamino acids/peptides produced upon oxidation can be conveniently reduced by SO/sub 2/ and H/sub 2/S to regenerate the starting materials, thus making possible the recycling of the reagents.

• Research Organization: Applied Science Div., Lawrence Berkeley Lab., Univ. of California, Berkeley, CA (US)
• OSTI ID: 6296442
• Journal Information: Ind. Eng. Chem. Res.; (United States), Journal Name: Ind. Eng. Chem. Res.; (United States) Vol. 27:11; ISSN IECRE
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
AMINO ACIDS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHELATES
CHELATING AGENTS
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
COMPLEXES
CONTROL
CYSTEINE
DESULFURIZATION
EDTA
FLUE GAS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPLEXES
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEPTIDES
POLLUTION CONTROL
PROTEINS
RADICALS
RECYCLING
SCRUBBING
SULFHYDRYL RADICALS
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THIOLS
TRANSITION ELEMENT COMPLEXES
WASTES