Bio-oil from fast pyrolysis of lignin: Effects of process and upgrading parameters

Bioresour Technol. 2017 Oct:241:1118-1126. doi: 10.1016/j.biortech.2017.05.129. Epub 2017 May 21.

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.

Keywords: Bio-oil; Lignin pyrolysis; Process parameters; Upgrading.

Publication types

  • Review

MeSH terms

  • Biofuels*
  • Catalysis
  • Hot Temperature
  • Lignin*
  • Temperature

Substances

  • Biofuels
  • Lignin