| 초록 |
In this study, the coal gasification using Steam + CO2 mixtures was investigated and the synergistic effect in catalyst coal gasification was revealed. The gasification experiments were conducted over a temperature range of 800–900 ℃ at atmospheric pressure. Adaro coal was mixed three mineral catalysts such as Dolomite, Silica sand and Kaolin. Experimental samples were then gasified four environments ranging from pure CO2 300 cc/min to pure Steam 300 cc/min in 100 cc/min increments. The results suggest that the addition of CO2 improved the char reactivity, which is higher than the sum of the individual reactivity using either Steam or CO2. The modified volumetric reaction model of the gas-solid reaction was applied to the experimental data to obtain kinetic information. The catalytic activity of single catalysts followed the sequence Dolomite ＞ Kaolin ＞ Silica sand ＞ No catalyst. Using Steam + CO2 mixtures gas in gasification and catalytic activity of Dolomite was the critical factor. |
