Hydrothermal flames in supercritical water oxidation: investigation in a pilot scale continuous reactor |
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Authors: | Roberto M Serikawa Takashi UsuiTatuya Nishimura Hirokazu SatoShusaku Hamada Hideo Sekino |
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Affiliation: | a Ebara Research Co., Ltd., 2-1 Honfujisawa 4-chome, Fujisawa 251-8502, Japan b Ebara Corporation, 1-6-27 Konan, Minato-ku, Tokyo 108-8480, Japan |
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Abstract: | Hydrothermal flames at 25 MPa supercritical water environment were investigated using a 4800 ml reaction tower, in which the sapphire windows were fitted for optical access. Down flowing hydrothermal flames were observed for oxidation of 2-propanol when the reactor was fed with inlet organic concentration higher than 2 vol% and air ratio higher than 1.8. Flame temperature, as high as 1100 °C, was measured by means of a thermocouple and the temperature was found to be strongly influenced by air ratio. Effective and stable oxidation of organics with TOC removal rate of 99.9% was achieved. Dioxins were also decomposed with a ratio higher than 99.9%, within 1 min reaction time in this reactor configuration. |
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Keywords: | Hydrothermal flames Supercritical water oxidation Down flowing reactor |
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