Pressure enhanced reversible adsorption of NO{sub x} by activated carbons
- Univ. of Kentucky, Lexington, KY (United States)
Although a tremendous amount of research has been and continues to be performed on the catalytic reduction of NO{sub x}, the development of selective adsorbents for NO{sub x} could provide a chemically benign option for the control of these emissions through a process which sequesters and then concentrates NO{sub x}. One requirement for an adsorption/desorption process is a material with a high, reversible adsorption capacity. A number of potential adsorbents have been examined, including metal oxides, zeolites, activated carbons, and carbon fibers. Activated carbons in the absence of O{sub 2} have slow NO adsorption kinetics and low NO adsorption capacities. However, at temperatures between 20-120{degrees}C and in the presence of O{sub 2} recent studies has shown that both the kinetics and capacities are enhanced dramatically. The research suggested that activated carbon catalytically converted NO + 1/2 O{sub 2} {r_arrow} NO{sub 2}, which then condensed within the micropores of the carbon. At atmospheric pressure and 70{degrees}C, the NO{sub x} adsorption capacities were as high as 150 mg NO{sub 2} (g carbon). Other coreactants such as CO{sub 2} and H{sub 2}O did not inhibit nor were significantly adsorbed.
- OSTI ID:
- 433139
- 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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