| 초록 |
Human health effects and material damage from corrosive acidic species like SO2 and NOx are confined to local regions around pollution sources. In general, combustion flue gas lives in a low temperature atmosphere of 373-423 K with about 1000 ppm of NOx and SO2 respectively and an excessive amount of O2 is definitely included. NOx has a 7:1-10:1 ratio of NO to NO2. The advantages of processing combustion flue gas using general activated carbon are based on the fact that not only NOx and SO2 are removed, but noxious substances such as hydrogen fluoride (HF), hydrogen chloride (HCl), mercury (Hg) included in the combustion flue gas are removed at the same time. Also, because industrial water is not used, secondary pollution is not the outcome and useful by-products can be obtained during this process. Noxious substance removal using general activated carbon based on the physisorption, to this day, is still reported to have very low selective removal efficiency with the exception of volatile organic compounds. During the recent years, studies on the surface group of the activated carbon itself were conducted with great interest, but the characteristics of the activated carbon surface group and its accurate amount is known to be very difficult to analyze. The surface, in particular, has many pores in irregular sizes and roughness making the analysis all the more difficult. To understand and use impregnated activated carbon appropriately, it is most important that the chemical characteristics as well as the selective adsorption behavior of the surface are accurately identified. This study, therefore, aims at identifying the simultaneous adsorption characteristics of NO, NO2 and SO2 in the combustion flue gas condition using KOH impregnated activated carbon and defining the surface chemistry under the condition. |
