고압 저등급탄-이산화탄소 슬러리 분무특성에 관한 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 26; no. 4; pp. 357 - 362
• Main Authors: 송주헌(Ju Hun Song), 김학덕(Hak Duck Kim), 김창연(Chang Yeon Kim)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2015
• Subjects: 기계공학; Liquid carbon dioxide(LCO₂); 증발 분무; Coal gasification; 액화 이산화탄소; Flashing spray; Coal slurry; 석탄 가스화; 석탄 슬러리
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2015.26.4.357

There is potential method to utilize the liquid carbon dioxide ($LCO_2$) in coal gasification plants. The $LCO_2$ could be used to effectively transport coal particles instead of conventional carrier such as liquid water ($H_2O$) particularly in wet-fed gasifier. However, there is a lack of fundamental study on the atomization behavior of $LCO_2$ coal slurry under high pressure condition. In this study, the flashing spray characteristics of a coal mixture with $LCO_2$ was examined during a throttling process by using a flow visualization system. The spray of coal water slurry which is in the Rayleigh-type break up mode was significantly different. This difference indicates that the coal water slurry did not effectively transport the coal, as compared to $LCO_2$ coal slurry.