| 초록 |
The sulfur removing capacities of Zn-Ti-based sorbents prepared by co-precipitation were tested in various hot coal gas compositions using a fixed-bed reactor at 1 atm and middle-temperature condition (sulfidation : 480oC, regeneration : 580oC). The sulfur removing capacities of the sorbents were measured by a thermal conductivity detector (TCD) and flame photometric detector (FPD). The hot coal gas composition usually consisted of five gases which were H2S, CO2, CO, H2, N2. The concentrations of the H2S and CO2 gases were fixed to 1.5 % and 2 %, and those of H2 and CO gases were changed from 0% to 55%, respectively. The sulfur removing capacities of the sorbents were not affected with the increase of the H2 gas and decreased with the increase of the CO gas. In addition, in the case of the condition of the CO 55% without H2 gas, the SO2 gas was produced in the initial reaction when H2S gas removed. This phenomenon was not indicated in the condition with H2 gas above 20%. The role of gases and the sulfur removing capacity of the sorbent in various gas conditions were discussed. |
