However,
the hemicellulose content decreased with increasing concentrations
of H2SO4. This comportment was When H3PO4 was used for
pretreatment, the glucan content increased when the acid concentration
was increased. However, there was still a significant
amount of hemicellulose present (14.3%) when 0.4 mol/L H3PO4
was used for pretreatment. The mass fraction of corn stover was
significantly reduced after pretreatment with either of the two
acids.