According to the Renewable Fuels Association (2003), the US annual fuel ethanol capacity was 2.9 • 109 US gallons in 2002, an increase of 109 US gallons over the production level in 2000. This industry forms an infrastructure from which future growth in cellulosic substrates utilization may occur. Demand for fuel ethanol is expected to increase. In addition to ethanol, forty chemicals and chemical feedstocks have been identified as potential products from renewable plant biomass