title: Compositional insights and valorization pathways for carbonaceous material deposited during bio-oil thermal treatment.
abstract: This work analyses the composition, morphology, and thermal behavior of the carbonaceous materials deposited during the thermal treatment of bio-oil (thermal pyrolytic lignin-TPL). The bio-oil was obtained by flash pyrolysis of lignocellulosic biomass (pine sawdust), and the TPLs were obtained in the 400-700 °C range. The TPLs were characterized by performing elemental analysis; (13)C NMR, Raman, FTIR, and X-ray photoelectron spectroscopy; SEM; and temperature-programmed oxidation analyzed by differential thermogravimetry and differential scanning calorimetry. The results are compared to a commercial lignin (CL). The TPLs have lower oxygen and hydrogen contents and a greater aromaticity and structural order than the CL material. Based on these features, different valorization routes are proposed: the TPL obtained at 500 °C is suitable for use as a fuel, and the TPL obtained at 700 °C has a suitable morphology and composition for use as an adsorbent or catalyst support.
authors: Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 644-48080 Bilbao (Spain), Fax: (+34) 94601-3500 http://www.ehu.es/pedro.castano/
authors: Aitor
authors: A
authors: Ochoa
authors: Borja
authors: B
authors: Aramburu
authors: María
authors: M
authors: Ibáñez
authors: Beatriz
authors: B
authors: Valle
authors: Javier
authors: J
authors: Bilbao
authors: Ana G
authors: AG
authors: Gayubo
authors: Pedro
authors: P
authors: Castaño
mesh_terms: D056804:Biofuels; D018533:Biomass; D002244:Carbon / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry; D013696:Temperature
chemical_list: D056804:Biofuels; C036909:lignocellulose; D002244:Carbon; D008031:Lignin
keywords: biochar; carbonaceous residue; characterization; renewable waste; valorization