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A review of catalytic hydrodeoxygenation of lignin-derived phenols from biomass pyrolysis

► First review of the catalytic hydrodeoxygenation (HDO) of lignin-derived phenols. ► Review of the applied HDO catalysts. ► Review of reaction mechanism of HDO of lignin-derived phenols. ► Review of the kinetics of HDO of different lignin-derived model compounds. ► HDO-prospects and required furthe...

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Bibliographic Details
Published in:Bioresource technology 2012-11, Vol.124, p.470-477
Main Authors: Bu, Quan, Lei, Hanwu, Zacher, Alan H., Wang, Lu, Ren, Shoujie, Liang, Jing, Wei, Yi, Liu, Yupeng, Tang, Juming, Zhang, Qin, Ruan, Roger
Format: Article
Language:English
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Summary:► First review of the catalytic hydrodeoxygenation (HDO) of lignin-derived phenols. ► Review of the applied HDO catalysts. ► Review of reaction mechanism of HDO of lignin-derived phenols. ► Review of the kinetics of HDO of different lignin-derived model compounds. ► HDO-prospects and required further research and developments are discussed. Catalytic hydrodeoxygenation (HDO) of lignin-derived phenols which are the lowest reactive chemical compounds in biomass pyrolysis oils has been reviewed. The hydrodeoxygenation (HDO) catalysts have been discussed including traditional HDO catalysts such as CoMo/Al2O3 and NiMo/Al2O3 catalysts and transition metal catalysts (noble metals). The mechanism of HDO of lignin-derived phenols was analyzed on the basis of different model compounds. The kinetics of HDO of different lignin-derived model compounds has been investigated. The diversity of bio-oils leads to the complexities of HDO kinetics. The techno-economic analysis indicates that a series of major technical and economical efforts still have to be investigated in details before scaling up the HDO of lignin-derived phenols in existed refinery infrastructure. Examples of future investigation of HDO include significant challenges of improving catalysts and optimum operation conditions, further understanding of kinetics of complex bio-oils, and the availability of sustainable and cost-effective hydrogen source.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2012.08.089