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http://dx.doi.org/10.7316/KHNES.2015.26.4.357

Spray Characteristics of a Coal Slurry with Liquid Carbon Dioxide  

KIM, CHANGYEON (Grad. School of Pusan National University)
KIM, HAKDUCK (Grad. School of Pusan National University)
SONG, JUHUN (School of Mechanical Engineering, Pusan National University Univ.)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.26, no.4, 2015 , pp. 357-362 More about this Journal
Abstract
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.
Keywords
Coal gasification; Flashing spray; Liquid carbon dioxide($LCO_2$); Coal slurry;
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