The heat transfer characterisitcs of activated carbon suspended slurry near the critical point of water was determined experimentally using a double-pipe heat exchanger. The preliminary experiment to measure the heat transfer coefficient of water showed the value predicted by the previous study. There is hardly any effect of activated carbon addition and change of its concentration. This result suggests that heat transfer of biomass slurry with suspended catalyst powders near the critical point of water can be estimated using the heat transfer characteristics of water, which is of practical importance.
