An important parameter in the extraction of heterogeneous, biogenic substance mixtures is the achievable extractives yield as well as the extraction time required for this. Supercritical carbon dioxide can be used to extract interesting groups of substances from wood-derived pyrolysis liquids. Now, by optimizing the reactor design, it has been possible to increase the yields of extractives at a laboratory plant. By accelerating the extraction process, the extraction time required for this could be reduced. Through gaschromatopraphic measurements (GC-MS/FID), it was found that the extraction of various substance groups such as acids, syringols, guaiacols and carbohydrates can be influenced by adjusting the density of the supercritical carbon dioxide.
More Informations: "The Journal of Supercritical Fluids"
Thünenproject: "Putting more nature on paper"
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