2.3. Pretreatment
Dilute sulfuric acid pretreatment was employed in this investigation.
A total of 10 g of wood particles produced under each size
reduction condition and 200 mL of 1% (w/w) sulfuric acid were
loaded into the 600-mL vessel of a Parr pressure reactor (Model
4760A, Parr Instrument Co., Moline, IL, USA) and treated at
195 _C for 30 min.