237 Diluted and concentrated acidic extraction (DAE and CAE respectively) allow the 238 breakdown of hemicellulose into monosaccharide. Even though stronger acidic conditions 239 improve the homogeneity of the reaction and allow the use of lower temperature and pressure, 240 it faces corrosion, acidic waste management and stronger degradation issues converting 241 sugars into furanic moieties or humines. Even though this decomposition can be slowed 242 by adding protectors such as ethyl-ethyl ketone , these conditions are typically used for 243 the more robust crystalline carbohydrate polymer, cellulose, to produce glucose using 10-30 244 % H2SO4 for example. These conditions can even be used to directly produce furanic derivates A wide range of acids have been investigated to hydrolyse hemicellulose and are listed in Table alongside their specificities and advantages. [56] [74] Overall, sulfuric acid is found to be the most efficient and selective catalyst for acidic hydrolysis with the highest monomeric xylose and arabinose yields while leaving the cellulose in the solid fraction.