Effect of scrubbing operating conditions on adipic acid degradation. Final report February-August 1980

Technical Report · Sun Feb 01 04:00:00 EST 1981

OSTI ID:5930793

Chang, J C.S.

The report gives results of adipic acid degradation tests at EPA's IERL-RTP limestone SO2 scrubber, to investigate the effects of operating variables on unaccountable adipic acid loss. It was found that: (1) adipic acid degradation could not be totally quenched by only lowering the pH below 5.0; (2) pH change did significantly affect unaccountable adipic acid loss (other factors may increase the adipic acid degradation rate at both high and low pH); (3) an appreciable amount of adipic acid loss was caused by coprecipitation with calcium sulfite; and (4) forced oxidation could aggravate the adipic acid degradation loss even at pH below 5.0. Adipic acid loss could be reduced: at high sulfite concentrations (the adipic acid degradation rate could be decreased by lowering the destructive free radical concentrations by high total sulfite); in the presence of manganous ion at low pH (the metal ion might act as an inhibitor to the oxidative degradation reaction at low pH); and with high natural oxidation (the adipic acid coprecipitation loss might be reduced with the high natural oxidation). Adipic acid degradation (loss) data were compared from four different test facilities. Most of the data also support these conclusions.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• OSTI ID: 5930793
• Report Number(s): PB-81-163305
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADIPIC ACID
AIR POLLUTION CONTROL
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
COMPARATIVE EVALUATIONS
CONTROL
DECOMPOSITION
DICARBOXYLIC ACIDS
EQUIPMENT
INDUSTRIAL WASTES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PH VALUE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
SCRUBBING
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES