Composition, texture and methane potential of cellulosic residues from Lewis acids organosolv pulping of wheat straw.
Cellulosic pulps have been successfully isolated from wheat straw through a Lewis acids organosolv treatment. The use of Lewis acids with different hardness produced pulps with different delignification degrees. The cellulosic residue was characterised by chemical composition, X-ray diffraction, FT-IR spectroscopy, N2 physisorption, scanning electron microscopy and potential for anaerobic digestibility. Surface area and pore volume increased with the hardness of the Lewis acid, in correspondence with the decrease of the amount of lignin and hemicellulose in the pulp. The non linearity of the correlation between porosity and composition suggests that an agglomeration of cellulose fibrils occurs in the early stages of pulping. All organosolv pulps presented a significantly higher methane potential than the parent straw. A methane evolution of 295Ncm(3)/g OM was reached by a moderate improvement of the accessibility of the native straw.
ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France.
Sandra
S
Constant
INRA, UMR 1208, Ingénierie des Agropolymères et Technologies Emergentes (IATE) 2, Place Pierre Viala, 34060 Montpellier Cedex 1, France.
Abdellatif
A
Barakat
ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France.
Mike
M
Robitzer
ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France. Electronic address: direnzo@enscm.fr.
Francesco
F
Di Renzo
INRA, LISBP - INSA de Toulouse, INSA/CNRS 5504 - UMR INSA/INRA 792, 135 avenue de Rangueil, 31077 Toulouse Cedex 04, France.
Claire
C
Dumas
ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France.
Françoise
F
Quignard
D000327:Adsorption; D001673:Biodegradation, Environmental; D001709:Biotechnology / Q000379:methods*; D002482:Cellulose / Q000378:metabolism*; D003460:Crystallization; D058116:Lewis Acids / Q000378:metabolism*; D008031:Lignin / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D011134:Polysaccharides / Q000378:metabolism; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014908:Triticum / Q000737:chemistry*; D014866:Waste Products
D058116:Lewis Acids; D011134:Polysaccharides; D014866:Waste Products; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin; D008697:Methane
Biodegradability; Biomass valorisation; Epidermal structure; Ethanosolv; Homogeneous catalysis; Surface area