A mixture of waste sawdust for various differentwoods was used as a feedstock for the experiments, and it wasprovided by a waste wood recycling company, Ecco Chips Co., inCalgary, Alberta, Canada. The sawdust was sieved and separated intovarious size fractions, with particle diameters of smaller than 590 μm.Table 1 shows the results of the analyses of the sawdust. Sulfur was nottabulated, because the sulfur content was low in the feedstock