Hydrothermal Conversion of Lignin and Its Model Compounds into Formic Acid and Acetic Acid
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With the fast depletion of fossil fuels, the development of effective approach for the production of value-added chemicals from renewable resources is strongly desired. Lignin is a main constituent of lignocellulosic biomass, which accounts for 15–30 % by weight and 40 % by energy. Therefore, lignin conversion has significant potential as a source for the sustainable production of chemicals and fuels. However, lignin has received little attention because of its highly crosslinked macromolecule structure and chemical properties. Hydrothermal technology has received much attention in the treatment of organic wastes and biomass conversion because of the unique inherent properties of high temperature water. Here, some recent studies on hydrothermal conversion of lignin and its model compounds into value-added chemicals such as formic acid and acetic acid are presented. Phenol and syringol are mainly introduced as lignin model compounds. It will be useful in exploring the potential approaches for the lignin conversion into useful chemicals and fuels.
KeywordsFormic Acid Oxygen Supply Fumaric Acid Lignin Model Compound Muconic Acid
The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 21277091 and No. 21077078), the National High Technology Research and Development Program of China (863 Program; No. 2009AA063903).
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