| 초록 |
Sulfur oxides(SOx) can be formed by oxidation of sulfur in fossil fuel and emitted from the industrial processes. The emission of waste gas streams containing sulfur oxides into the atmosphere is environmentally undesirable. In this study, the potassium-based dry sorbents were prepared by impregnation of potassium carbonate or potassium hydroxide on the alumina supports. The SO2 absorption was tested in a fixed-bed at low temperature conditions(30~60℃ in the presence of 5000 ppm of the SO2). Their abilities of SO2 absorption were investigated under the various the H2O concentrations(1 vol%~9 vol%) and absorption temperatures. It was found that the SO2 removing capacities of potassium based sorbents increased with the H2O concentration in our experimental range. In particular, the K2CO3/Al2O3 sorbent showed excellent SO2 removal capacity(0.34 SO2 g/ sorbent g) even at 5vol% H2O and 30℃. Characterization of sorbnets by the results of XRD, FT-IR and BET were carried out and the results were discussed. |
