Structural Characterization and Comparison of Switchgrass Ball-milled Lignin Before and After Dilute Acid Pretreatment
- 24 August 2009
- journal article
- research article
- Published by Springer Science and Business Media LLC in Applied Biochemistry and Biotechnology
- Vol. 162 (1), 62-74
- https://doi.org/10.1007/s12010-009-8749-y
Abstract
To reduce the recalcitrance and enhance enzymatic activity, dilute H2SO4 pretreatment was carried out on Alamo switchgrass (Panicum virgatum). Ball-milled lignin was isolated from switchgrass before and after pretreatment. Its structure was characterized by 13C, HSQC, and 31P NMR spectroscopy. It was confirmed that ball-milled switchgrass lignin is of HGS type with a considerable amount of p-coumarate and felurate esters of lignin. The major ball-milled lignin interunit was the β-O-4 linkage, and a minor amount of phenylcoumarin, resinol, and spirodienone units were also present. As a result of the acid pretreatment, there was 36% decrease of β-O-4 linkage observed. In addition to these changes, the S/G ratio decreases from 0.80 to 0.53.Keywords
This publication has 41 references indexed in Scilit:
- Response of Thermochemical and Biochemical Conversion Processes to Lignin Concentration in Alfalfa StemsEnergy & Fuels, 2008
- The new forestry biofuels sectorBiofuels, Bioproducts and Biorefining, 2007
- Fractionating recalcitrant lignocellulose at modest reaction conditionsBiotechnology & Bioengineering, 2007
- The Path Forward for Biofuels and BiomaterialsScience, 2006
- Ethanol Can Contribute to Energy and Environmental GoalsScience, 2006
- Cellulase, Clostridia, and EthanolMicrobiology and Molecular Biology Reviews, 2005
- Biotechnological processes for conversion of corn into ethanolApplied Microbiology and Biotechnology, 2004
- Climate Sensitivity Uncertainty and the Need for Energy Without CO 2 EmissionScience, 2003
- Hydrolysis of lignocellulosic materials for ethanol production: a reviewBioresource Technology, 2001
- Utilisation of biomass for the supply of energy carriersApplied Microbiology and Biotechnology, 1999