Abstract
Effects of process parameters on the yield and chemical profile of bio-oil from fast pyrolysis of lignin and the processes for lignin-derived bio-oil upgrading were reviewed. Various process parameters including pyrolysis temperature, reactor types, lignin characteristics, residence time, and feeding rate were discussed and the optimal parameter conditions for improved bio-oil yield and quality were concluded. In terms of lignin-derived bio-oil upgrading, three routes including pretreatment of lignin, catalytic upgrading, and co-pyrolysis of hydrogen-rich materials have been investigated. Zeolite cracking and hydrodeoxygenation (HDO) treatment are two main methods for catalytic upgrading of lignin-derived bio-oil. Factors affecting zeolite activity and the main zeolite catalytic mechanisms for lignin conversion were analyzed. Noble metal-based catalysts and metal sulfide catalysts are normally used as the HDO catalysts and the conversion mechanisms associated with a series of reactions have been proposed.
Original language | English (US) |
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Pages (from-to) | 1118-1126 |
Number of pages | 9 |
Journal | Bioresource Technology |
Volume | 241 |
DOIs | |
State | Published - 2017 |
Bibliographical note
Publisher Copyright:© 2017 Elsevier Ltd
Keywords
- Bio-oil
- Lignin pyrolysis
- Process parameters
- Upgrading