Gasification of 0.6 M glucose in supercritical water was investigated at a temperature range from 480 to 750 °C and 28 MPa with a reactor residence time of 10−50 s. The yield of hydrogen among gaseous products increased very sharply with increasing temperature above 660 °C. On the other hand, the yield of carbon monoxide decreased with temperature, most probably due to the role of a water−gas shift reaction. Carbon gasification efficiency reached 100% at 700 °C. A simplified model was proposed for the reaction pathways related to hydrogen production. The rates for glucose conversion and COD degradation were obtained by assuming pseudo-first-order kinetics.

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