Gasification of glucose was carried out over the 16 wt% Ni/activated charcoal in supercritical water at 28 MPa. Effects of temperature 575-725 degrees C), feed concentration (0.3-0.9 M), and LHSV (6-24 h(-1)) were investigated on the product distribution. For comparison, the gasification experiments were performed with activated charcoal and also without catalyst. While the Ni/activated charcoal catalyst showed a good yield of hydrogen, it was deactivated due to coke deposition especially at low temperatures below 650 degrees C and also due to sintering of nickel particles.