[RenewableEnergyAccess.com] Dutch chemical engineer Mark Prins has combined torrefaction and gasification to show that biomass is an efficient means of producing sustainable energy for the country. Torrefaction is a method of roasting woody biomass at a temperature of 250 to 300 degrees Celsius, which increases the calorific value of the biomass and decreases its humidity content. This makes it easier to use woody biomass in gasification because the wood is less ‘over-oxidized’ than untreated biomass. Experimental research into the torrefaction of biomass was carried out in cooperation with the Netherlands Energy Research Foundation (ECN) and Shell Global Solutions, with the support of the Sustainable Energy Foundation (SDE). The process is more suitable for hardwood, such as beech and willow, and straw, than for softwoods, such as larch.