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- Title
Imidazole Processing of Wheat Straw and Eucalyptus Residues—Comparison of Pre-Treatment Conditions and Their Influence on Enzymatic Hydrolysis.
- Authors
Pereira, Pedro M. A.; Bernardo, Joana R.; Roseiro, Luisa Bivar; Gírio, Francisco; Łukasik, Rafał M.
- Abstract
Biomass pre-treatment is a key step in achieving the economic competitiveness of biomass conversion. In the present work, an imidazole pre-treatment process was performed and evaluated using wheat straw and eucalyptus residues as model feedstocks for agriculture and forest-origin biomasses, respectively. Results showed that imidazole is an efficient pre-treatment agent; however, better results were obtained for wheat straw due to the recalcitrant behavior of eucalyptus residues. The temperature had a stronger effect than time on wheat straw pre-treatment but at 160 °C and 4 h, similar results were obtained for cellulose and hemicellulose content from both biomasses (ca. 54% and 24%, respectively). Lignin content in the pre-treated solid was higher for eucalyptus residues (16% vs. 4%), as expected. Enzymatic hydrolysis, applied to both biomasses after different pre-treatments, revealed that results improved with increasing temperature/time for wheat straw. However, these conditions had no influence on the results for eucalyptus residues, with very low glucan to glucose enzymatic hydrolysis yield (93% for wheat straw vs. 40% for eucalyptus residues). Imidazole can therefore be considered as a suitable solvent for herbaceous biomass pre-treatment.
- Subjects
WHEAT straw; EUCALYPTUS; HEMICELLULOSE; IMIDAZOLES; HYDROLYSIS; BIOMASS conversion; ECONOMIC competition
- Publication
Molecules, 2021, Vol 26, Issue 24, p7591
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules26247591