title: High resolution solid state 2D NMR analysis of biomass and biochar.
abstract: Solid state NMR methods are required to analyze biomass as a function of its chemical or biological treatment for biofuels, chemicals, or biochar production. The native polymers network in lignocellulosic biomass and other solid materials, such as coal, coke, or biochar, can hardly be analyzed by liquid state NMR due to their poor swelling ability without chemical modification. A (1)H-(13)C two-dimensional heteronuclear correlation (HETCOR) experiment with frequency-switched Lee-Goldburg (FSLG) irradiation is performed on a high field spectrometer (750 MHz). This method leads to previously unattained resolution for biomass and biochar and offers a unique ability to reveal their chemical composition. The formation of aromatic moieties from carbohydrates and lignin thermal conversion is clearly distinguished. This method can be applied to all other carbonaceous materials.
authors.affiliation: LRGP, CNRS, Université de Lorraine , 1 Rue Grandville, 54000, Nancy, France.
authors.forename: Yann
authors.initials: Y
authors.lastname: Le Brech
authors.forename: Luc
authors.initials: L
authors.lastname: Delmotte
authors.forename: Jesus
authors.initials: J
authors.lastname: Raya
authors.forename: Nicolas
authors.initials: N
authors.lastname: Brosse
authors.forename: Roger
authors.initials: R
authors.lastname: Gadiou
authors.forename: Anthony
authors.initials: A
authors.lastname: Dufour
mesh_terms: D018533:Biomass; D002606:Charcoal / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D011108:Polymers / Q000737:chemistry*
chemical_list: D011108:Polymers; C540010:biochar; D002606:Charcoal