The Characteristics of Coal Gasification using Microwave Plasma

The investigation of clean and environment-friendly coal utilization technology is actively progressed due to high oil price and serious climate change caused by greenhouse gas emissions. In this study, the plasma gasification was performed using a 6kW microwave plasma unit under various reaction conditions: the particle sizes of coal (), /fuel ratio (0 - 1.3), and steam/fuel ratio (0 - 1.5). The composition decreases with decreasing coal particle size. With increasing /fuel ratio, the composition in the syngas decreased while the composition increased. As the steam/fuel ratio increased from 0 to 1.5, the composition in the syngas increased while the composition decreased. From the results, it was proven that the variation of syngas composition greatly affected by /fuel ratio than steam/fuel ratio. The composition in the syngas, carbon conversion, and cold gas efficiency increased with increasing plasma power.