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
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), Vol. 27:11
- Country of Publication:
- United States
- Language:
- English
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Combined NO/sub x//SO/sub 2/ removal from flue gas using ferrous chelates of SH-containing amino acids and alkali
Use of ferrous cysteine and cysteine derivatives for the removal of NO/sub x/ and SO/sub 2/ from flue gas
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHELATES
CHEMICAL PROPERTIES
FLUE GAS
DESULFURIZATION
IRON COMPLEXES
AIR POLLUTION CONTROL
AMINO ACIDS
CYSTEINE
EDTA
HYDROGEN SULFIDES
NITRIC OXIDE
PEPTIDES
RECYCLING
SCRUBBING
SULFHYDRYL RADICALS
SULFUR DIOXIDE
CARBOXYLIC ACIDS
CHALCOGENIDES
CHELATING AGENTS
CHEMICAL REACTIONS
COMPLEXES
CONTROL
GASEOUS WASTES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
PROTEINS
RADICALS
SULFIDES
SULFUR COMPOUNDS
SULFUR OXIDES
THIOLS
TRANSITION ELEMENT COMPLEXES
WASTES
424000* - Engineering- Pollution Control Equipment- (1980-1989)
400201 - Chemical & Physicochemical Properties