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- W3188351660 abstract "It is difficult to evaporate water and burn volatile content at high pressures owing to the conflict in boiling temperatures of two components in the coal. The evaporation of water is critical for low rank coal with water content exceeding 20 %. However, the hydrophobicity of liquid carbon dioxide (LCO 2 ) can release water from inner coal, which in turn can solve the problem of evaporation and the subsequent combustion process. However, there is a paucity of studies that examine such water removal and evaporation/combustion behaviors of LCO 2 –low rank coal slurry. In this study, the effect of LCO 2 on the combustion behavior of low rank coal at high pressure is examined and compared with that of raw coal and water–coal slurry. A visualization technique is introduced to observe the evaporation and combustion of coal slurry under the high-pressure fixed-bed condition. The bed temperature is measured at two different temperatures, and the char, gas, and liquid yield are simultaneously determined. Enhanced volatile combustion is observed at 650 °C for the LCO 2 –coal slurry, which is due to the rapid release and evaporation of water. The water removal phenomenon by LCO 2 in high moisture coal are supported by both data from forward scattering and thermogravimetric analysis measurement. • At high temperature, LCO 2 enhances volatile combustion process significantly. • The faster evaporation is observed for LCO 2 -coal slurry at low temperature. • Forward scattering intensity confirms water removal process in high moisture coal. • LCO 2 turns wet coal to dry coal which aids in the subsequent combustion process." @default.
- W3188351660 created "2021-08-16" @default.
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- W3188351660 date "2021-12-01" @default.
- W3188351660 modified "2023-09-27" @default.
- W3188351660 title "Enhanced combustion processes of liquid carbon dioxide (LCO2)–low rank coal slurry at high pressures" @default.
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- W3188351660 doi "https://doi.org/10.1016/j.energy.2021.121566" @default.
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