| 초록 |
The presence of oxygen in adsorbate was pointed out as a critical factor in increasing adsorptivity. The fact that the presence of oxygen is one of the biggest variables to decide adsorptivity spurred interest in the introduction of impregnated activated carbon as NOx abatement technology, for an excess of oxygen exists in most NOx-emitted processes including incinerators. However, when it comes to impregnated activated carbon, there is no clear-cut interpretation on the behavior of NO and NO2 in the presence of oxygen. To tackle such bottleneck, a concrete understanding of surface chemistry should precede. The purpose of a scale up design in this paper, which is additionally dealt, is to predict adsorption capacity and to collect results, so as to present a way to determine the scale of adsorber according to packed amount and replacement cycle of adsorbents based on an easy design in the field. The adsorption process is known to be the most efficient process to abate gas phase mixtures. However, if the process is not designed appropriately, it can be costly. In particular, NOx adsorption on impregnated activated carbon is mostly chemisorption accompanying catalysis rather than physisorption. Moreover, its concrete mechanism is not defined yet. Therefore, NOx adsorption on impregnated activated carbon cannot apply to the simulation of adsorber for general separation and purification process. Also information regarding the design method is very insufficient. Under such circumstances, this study conducted breakthrough experiments depending on the presence of oxygen and the bed depth of adsorbent, defined surface changes from the adsorption of NOx, and calculated packed amount of adsorbent for the 6-month long abatement of NOx in a scale up condition by using simple adsorber design. |
