Separation, biomass systems, commercial

Biorefinery includes fractionation for separation of primary refinery products. The fractionation refers to the conversion of wood into its constituent components (cellulose, hemicelluloses and lignin). Processes include steam explosion, aqueous separation and hot water systems. Commercial products of biomass fractionation include levulinic acid, xylitol and alcohols. Figure 3.3 shows the fractionation of wood and chemicals from wood. 

Unlike cofiring woody biomass in PC boilers, cofiring sawdust or urban wood waste in cyclone boilers virtually always involves blending the biomass with the cc l an the way to the bunkers rather than squnately injecting the sawdust into the boiler. Only the King Station system involves separate injection of dry woody biomass into the boiler. There have been studies of rebum using woody biomass in cyclone boilers [28 -29], however this has not been commercially applied to date. 

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