The gasification of pine and mixed-hardwood chips has been carried out in a pilot-scale system at a range of gas flow rates. Consuming similar to 17-30 kgh(-1) of feedstock, the producer gas was composed of similar to 200 dm(3) m (3) carbon monoxide, 12 dm(3) m(-3) carbon dioxide, 30 dm(3) m(-3) methane and 190 dm(3) m (3) hydrogen, with an energy content of similar to 6 MJ m (3) for both feedstocks. It was found that the efficiency of the system was enhanced at higher flow rates. Published by Elsevier Ltd.