THE EFFECT OF LOW-CONCENTRATION SO2 ON THE ADSORPTION OF NO FROM GAS OVER ACTIVATED CARBON

Citation
Am. Rubel et Jm. Stencel, THE EFFECT OF LOW-CONCENTRATION SO2 ON THE ADSORPTION OF NO FROM GAS OVER ACTIVATED CARBON, Fuel, 76(6), 1997, pp. 521-526
Citations number
46
Categorie Soggetti
Energy & Fuels","Engineering, Chemical
Journal title
FuelACNP
ISSN journal
00162361
Volume
76
Issue
6
Year of publication
1997
Pages
521 - 526
Database
ISI
SICI code
0016-2361(1997)76:6<521:TEOLSO>2.0.ZU;2-R
Abstract
The effect of low-concentration SO2 on the adsorption of NO over activ ated carbon was studied using adsorption-desorption profiles obtained during thermal analysis-mass spectrometry. Using three different gas m ixtures and adsorption temperatures between 293 and 413 K with NO and SO2 as the reactants, it was determined that NO2 and SO2 were the prim ary adsorbed species. The uptake of NO2 decreased with increasing temp erature, whereas the uptake of SO2 was independent of temperature. Exc ept at the highest adsorption temperatures, the amount of NO2 adsorbed was greater than that of SO2 adsorbed. The presence of SO2 inhibited adsorption of NO2, but the co-adsorption of NO2 promoted the adsorptio n of SO2. These data point to the possibility that the SO2 binding sit es on the carbon are associated with the reaction NO + 1/2O(2) --> NO2 , and to the different adsorption mechanisms which control NO2 and SO2 uptake. (C) 1997 Elsevier Science Ltd.