Figure 4

Correlating pyrolytic yields of aromatics to Klason lignin. A comparison of all biomass types for all pretreatment conditions shows that the relationship between (A) aromatic pyrolytic yield versus Klason lignin and (B) the pyrolitic 4-vinylguaiacol as a proxy for cell wall ferulates versus Klason lignin with both normalized to the mass of the untreated sample to indicate the amount of material removed from the cell wall.