Simultaneous absorption of SO/sub 2/ and NO/sub 2/ in aqueous solutions of NaOH and Na/sub 2/SO/sub 3/

Journal Article · Sun Oct 01 04:00:00 EDT 1978 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i260068a002· OSTI ID:6575648

Takeuchi, H; Yamanaka, Y

Experiments on the absorption of sulfur dioxide and/or nitrogen dioxide diluted with nitrogen into aqueous solutions of sodium hydroxide and sodium sulfite with a plane interface were carried out at 1 atm and 25/sup 0/C in an agitated vessel (15 cm high, 10 cm ID). From a mixture with nitrogen oxides and nitrogen, the rate of nitrogen dioxide absorption into aqueous sodium hydroxide solution was enhanced by the presence of the sulfur dioxide, but into aqueous sodium sulfite solution, the rate was reduced. Such absorption behavior arose from the change of sulfite concentration at the gas-liquid interface. Therefore, the rate of nitrogen dioxide absorption with sulfur dioxide can be predicted according to the previously proposed mechanism of competitive reactions of nitrogen dioxide with sulfite and water. These results suggest that it may be possible to develop an economical process for removing sulfur dioxide and nitrogen oxides simultaneously from stack gases by an alkaline solution, especially at high sulfur dioxide concentrations.

• Research Organization: Nagoya Univ.
• OSTI ID: 6575648
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 17:4; ISSN IEPDA
• Country of Publication: United States
• Language: English

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ADSORPTION
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
BENCH-SCALE EXPERIMENTS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DENITRIFICATION
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KINETICS
MIXTURES
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POLLUTION CONTROL
SODIUM COMPOUNDS
SODIUM HYDROXIDES
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SULFITES
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SULFUR DIOXIDE
SULFUR OXIDES
WASTES