Fig. 6

Relationships between measured chemical and structural features and OrganoCat performance parameters. Temperature dependence is defined as the slope of the linear regression between the different glucose release values from enzymatic hydrolysis of pulps after 72 h for FDCA pretreatment at 140, 150, and 160 °C. Pretreatment efficiency is defined as pulp yield after pretreatment using FDCA and 160 °C. Pulp degradability is defined as glucose release from cellulase digestion of the pulp after using FDCA and 160 °C, Sugar yield is defined as the amount of reducing sugars determined in the aqueous phase after pretreatment with FDCA 160 °C. Lignin yield is defined as the amount of lignin extracted with 2-MTHF after pretreatment with FDCA at 160 °C. a Pearson’s correlation coefficients between OrganoCat parameters and biomass-related features. Disc diameter and color shade display the strength of the correlations. Positive correlations are displayed in blue and negative red, respectively. Asterisks indicate statistically significant coefficients with a p value ≤ 0.05. b Relationship between different lignocellulose parameters and selected parameters for OrganoCat performance. Plant materials are grouped based on the principle component analysis, blue circle: Maize, Sugarcane bagasse, Szarvasi, Miscanthus; orange circle: Sida, Silphium, Rapeseed, Empty fruit bunch; green circle Beech wood, Eucalyptus; yellow circle Pineapple