American Journal of Environmental Sciences

Assessing the Lignin Fraction Extracted from Brazilian Energy Crops

Diogo José Horst, Jhon Jairo Ramírez Behainne, Pedro Paulo de Andrade Junior and Luís Filippe Serpe

DOI : 10.3844/ajessp.2015.46.54

American Journal of Environmental Sciences

Volume 11, Issue 1

Pages 46-54

Abstract

This study quantifies the extraction performance and some properties of the lignin obtained from six crops with potential for generating thermal energy in Brazil. A full factorial design (22) with four replicates including two extraction methods and two particles size distributions was adopted for assessing the fraction of lignin, as well as its Higher Heating Value (HHV) and composition given by the proximate and ultimate analysis. It was verified that in all cases the HHV of the lignin is greater than that obtained for the respective raw material, suggesting that these lignins could be also used as fuel in thermochemical processes. The ANOVA analysis showed that at 95% of confidence level the lignin yield is influenced by the extraction methods, which employ different pH values during the hydrolysis treatment. In addition, it was found that, in most cases, a smaller biomass particle size contributed to more effective lignin extraction. Response surfaces were also included in order to show tendencies of the lignin yield obtained for each raw material in function of the pH value used by the extraction method and the biomass particle size range.

Copyright

© 2015 Diogo José Horst, Jhon Jairo Ramírez Behainne, Pedro Paulo de Andrade Junior and Luís Filippe Serpe. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.