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In the hot gas cleaning of producer gas generated from biomass gasification at 1173K, the ability of tar removal was investigated using various carbonaceous materials as a bed additive at the temperatures of 473 to 673K. Activated carbon, charcoal, and charcoal derived from feedstock were employed. The ability of tar removal was evaluated based on the difference in weights of the carbonaceous materials, before and after gasification. Carbonaceous materials had the ability of tar removal at the temperatures of 473 to 673K. It was largely dependent on the type of carbonaceous materials used and gas cleaning temperature. The specific surface area and average pore diameter of activated carbon would influence the ability of tar removal, and the activated carbon with a large specific surface area and a large average pore diameter was the most effective for tar removal at 573 K. In charcoal derived from feedstock, the ability of tar removal was similar to that in inactive ceramic balls.

Hot Gas Cleaning of Producer Gas from Biomass Gasification Using Carbonaceous Materials as a Bed Additive