Flash spray characteristics of a coal-liquid carbon dioxide slurry

作者：Kim Kangwook; Kim Hakduck; Kim Changyeon; Song Juhun^*

来源：Korean Journal of Chemical Engineering, 2016, 33(5): 1612-1619.

DOI：10.1007/s11814-016-0024-7

• Coal Gasification
• Flashing Spray
• Liquid Carbon Dioxide (LCO2)
• Coal Slurry
• Devolatilization

Liquid carbon dioxide (LCO2) could potentially be utilized in coal gasification plants for effectively transporting coal particles, replacing conventional carriers such as water (H2O), particularly in wet-fed gasifiers. However, it is essential to understand the atomization behavior of LCO2 leaving an injector nozzle under both coal-free and coalfed conditions. We examined the atomization behavior of a coal-LCO2 slurry during the throttling process. The injector nozzle was mounted downstream of a high-pressure spray system. The effect of upstream pressure on flash atomization and devolatilization behavior was presented. Compared with the coal-LCO2 mixture, the spray pattern of the coal-water mixture was significantly different, since it evidenced a Rayleigh-type breakup mode. This difference indicates that the coal-water slurry did not transport the coal as effectively as the coal-LCO2 slurry.

• 出版日期2016-5