Pre-treatment of cellulosic material
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United States of America Patent
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Sep 16, 2014
Grant Date -
Jun 6, 2013
app pub date -
Dec 17, 2010
filing date -
Dec 21, 2009
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Abstract
A method of pre-treating a cellulosic material before hydrolysis is provided. The method comprises the steps of: impregnating the cellulosic material with a reactive water-soluble gas, such as sulphur dioxide (SO2) or carbon dioxide (CO2), in an impregnation chamber to obtain impregnated material; and heating the impregnated material to obtain pre-treated material, wherein the cellulosic material is compressed right before or when it is transferred to the impregnation chamber. A corresponding system is also provided.
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