Since lift in concentration
of acid released more sugars along with the inhibitors like furfural
and hydroxyl methyl furfural. The glucan part of the solid residue
was improved and xylan was decreased after treatment with
0.25 M acid (Table 1) further increase in the acid concentration
not improved the glucan part. It was proved that the acid attack
on the polysaccharides, particularly hemicelluloses easily hydrolyzed
than cellulose and lignin. Further acid treatment is not adequate
to hydrolyze the crystalline cellulose which remains as
insoluble solid. Consequently, the cellulose and lignin fractions
almost unaltered in the solid phase. Corncob contains up to 30%
xylan portion which can readily be hydrolyzed into xylose by
dilute acids. After the removal of xylan from corncob, cellulose residue
is accessible for cellulases and converted into glucose, and further
converted to ethanol