Quantum mechanics

Scale (ratio)

Engineering

Materials science

Hydrothermal vent

Thermocouple

SCALE-UP

Chemical engineering

Classical mechanics

Supercritical fluid

Physics

Organic chemistry

Hydrothermal circulation

Environmental chemistry

Hydrothermal reaction

Environmental science

Composite material

Analytical Chemistry (journal)

Supercritical water oxidation

Chemistry

Fuel

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.

Hydrothermal flames in supercritical water oxidation: investigation in a pilot scale continuous reactor