NO{sub x} and SO{sub 2} adsorption on carbon
- Univ. of Kentucky, Lexington, KY (United States)
The need to control NO{sub x} emissions from fossil fuel power plants has lead to the development of commercially proven technologies, the best known being selective catalytic reduction (SCR). Because NO{sub x} concentrations are generally at near trace levels and less than 0.3%, a number of other potentially more efficient control measures have and are being investigated. One such measure includes the use of adsorbents such as metal oxides ion-exchanged zeolites, activated carbon fibers with and without modifiers, and activated carbons. Activated carbons can be used effectively for SCR and for the oxidation of SO{sub 2} to SO{sub 3} with the subsequent formation of H{sub 2}SO{sub 4}. The uptake of SO{sub 2} by carbons in the absence of NO{sub x} has been studied extensively. Moisture, O{sub 2} content, and temperature influence greatly the amount of SO{sub 2} adsorbed onto activated carbons, although agreement is lacking on the synergistic or detrimental effects of co-adsorbed O{sub 2} and H{sub 2}O. It has been suggested that two different sites on the carbon are involved in SO{sub 2} adsorption and oxidation, and that two different SO{sub 2} species are present on the carbon during and after adsorption. This work was performed to elucidate the reactions between nitrogen oxides and sulfur dioxide in and over activated carbons during adsorption and desorption.
- OSTI ID:
- 433115
- Report Number(s):
- CONF-960376--
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 1 Vol. 41; ISSN 0569-3772; ISSN ACFPAI
- Country of Publication:
- United States
- Language:
- English
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