The effect of low-concentration SO 2 on the adsorption of NO from gas over activated carbon

The effect of low-concentration SO 2 on the adsorption of NO over activated carbon was studied using adsorption-desorption profiles obtained during thermal analysis-mass spectrometry. Using three different gas mixtures and adsorption temperatures between 293 and 413 K with NO and SO 2 as the reactan...

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Bibliographic Details
Published inFuel (Guildford) Vol. 76; no. 6; pp. 521 - 526
Main Authors Rubel, Aurora M., Stencel, John M.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 1997
Subjects
adsorption
nitric oxide
sulfur dioxide
sulfur dioxide
nitric oxide
adsorption
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Summary:The effect of low-concentration SO 2 on the adsorption of NO over activated carbon was studied using adsorption-desorption profiles obtained during thermal analysis-mass spectrometry. Using three different gas mixtures and adsorption temperatures between 293 and 413 K with NO and SO 2 as the reactants, it was determined that NO 2 and SO 2 were the primary adsorbed species. The uptake of NO 2 decreased with increasing temperature, whereas the uptake of SO 2 was independent of temperature. Except at the highest adsorption temperatures, the amount of NO 2 adsorbed was greater than that of SO 2 adsorbed. The presence of SO 2 inhibited adsorption of NO 2, but the co-adsorption of NO 2 promoted the adsorption of SO 2. These data point to the possibility that the SO 2 binding sites on the carbon are associated with the reaction NO + 1 2 O 2 → NO 2, and to the different adsorption mechanisms which control NO 2 and SO 2 uptake.
ISSN:0016-2361
1873-7153
DOI:10.1016/S0016-2361(96)00221-9