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Received September 8, 2015
Accepted January 25, 2016
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Flash spray characteristics of a coal-liquid carbon dioxide slurry
School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
jxs704@pusan.ac.kr
Korean Journal of Chemical Engineering, May 2016, 33(5), 1612-1619(8), 10.1007/s11814-016-0024-7
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Abstract
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.
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Son SY, Kihm KD, Atom. Sprays, 8(5), 503 (1998)
Farago Z, Chigier N, Atom. Sprays, 2, 137 (1992)
Dechelette A, Campanella O, Corvalan C, Sojka PE, Chem. Eng. Sci., 66, 6367 (2011)
Zhao H, Liu HF, Xu JL, Li WF, Cheng W, Chem. Eng. Sci., 78, 63 (2012)
Rietz RD, Aerosol Sci. Technol., 12, 561 (1990)
Senda J, Hojyo Y, Fujimoto H, JSAE Rev., 15, 291 (1994)
PARK BS, LEE SY, Atom. Sprays, 4(2), 159 (1994)
Xiao J, Qiao X, Huang Z, Fang J, Chin. Sci. Bull., 49, 1195 (2004)
Wen CY, Chaung TZ, Ind. Eng. Chem. Process Des. Dev., 18, 684 (1979)
Govind R, Shah J, AIChE J., 30, 79 (1984)
Coal liquefaction, Available Online, http://en.wikipedia.org/wiki/Coal_liquefaction# cite_note-lee3-6.
Xu RF, Zhuang W, He QH, Cai J, Hu BX, Shen J, AIChE J., 55(9), 2461 (2009)
Baggio P, Baratieri M, Fiori L, Grigiante M, Avi D, Tom P, Energy Conv. Manag., 50(6), 1426 (2009)
Melgar A, Perez JF, Laget H, Horillo A, Energy Conv. Manag., 48(1), 59 (2007)
