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

• Published in: Bioresource technology Vol. 124; pp. 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: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.11.2012
• Subjects: Biomass; Catalysis; catalysts; Catalytic hydrodeoxygenation (HDO); chemistry; Hot Temperature; hydrogen; infrastructure; Kinetics; Lignin; Lignin - chemistry; Lignin-derived phenols; Mechanism; metals; Models, Theoretical; oils; Oxygen; Oxygen - chemistry; phenols; Phenols - chemistry; Pyrolysis; Catalytic hydrodeoxygenation (HDO); Pyrolysis; Kinetics; Lignin-derived phenols; Mechanism
• ISSN: 0960-8524; 1873-2976; 1873-2976
• DOI: 10.1016/j.biortech.2012.08.089

► 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.