期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 115, 期 -, 页码 63-73出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2011.12.005
关键词
Green chemicals; Aromatic; Lignin; Bio-oils; Hydrotreatment; Catalyst; Iron
资金
- CNRS (Centre National de la Recherche Scientifique, France)
- MESR (Ministere de l'Enseignement Superieur et de la Recherche, France)
Lignin could be an important green source for aromatic hydrocarbon production (benzene, toluene and xylenes, BTX). Catalytic hydrodeoxygenation (HDO) of guaiacol was studied over Fe/SiO2 as a model reaction of lignin pyrolysis vapours hydrotreatment. The catalytic conditions were chosen to match with the temperature of never-condensed lignin pyrolysis vapours. The catalyst was characterised by XRD. Mossbauer spectroscopy, N-2 sorption and temperature programmed oxidation. A comparison is made with a commercial cobalt-based catalyst. Cobalt-based catalyst shows a too high production of methane. Fe/SiO2 exhibits a good selectivity for BT production. It does not catalyse the aromatic ring hydrogenation. Temperature (623-723 K) and space time (0.1-1.5 g(cat) h/g(GUA)) influence the aromatic carbon-oxygen bond hydrogenolysis reaction whereas H-2 partial pressure (0.2-0.9 bar) has a minor influence. 38% of BT yield was achieved under the best investigated conditions. Reaction mechanisms for guaiacol conversion over Fe/SiO2 are discussed. (C) 2011 Elsevier B.V. All rights reserved.
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