Recent progress in the thermal and catalytic conversion of lignin

Jeong Myeong Ha, Kyung Ran Hwang, Young Min Kim, Jungho Jae, Kwang Ho Kim, Hyung Won Lee, Jae Young Kim, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

146 Scopus citations

Abstract

The issues over increases in energy demand and environmental pollution attributed to excessive use of fossil fuel have been the driving forces of the exploration for eco-friendly resource. Lignocellulosic biomass consisting of carbohydrates and lignin can be a renewable feedstock for replacing fossil fuels in the future because it is a plentiful and carbon neutral material. Especially, lignin, cross-linked phenolic polymers, is a topic of interest owing to its abundant production from pulp/paper industries as well as lignocellulose based biorefinery. The large potential of platform chemicals and biofuels from lignin has opened up an extensive range of opportunities to develop thermal and catalytic conversion technology. Over a few decades, several lignin conversion processes including catalytic pyrolysis, catalytic depolymerization, and catalytic oxidation have been developed to improve target products yields and to suppress side reactions. More recently, lignin-first approaches which maintain carbohydrates intact by selective extraction of lignin as valuable phenolics from whole biomass has been suggested. This review introduces recent ten years progress on thermal and catalytic conversion technology in terms of process type, catalyst development, and target products. This review is expected to offer an influential information for future research into the thermal and catalytic conversion of lignin as well as lignocellulosic feedstock.

Original languageEnglish
Pages (from-to)422-441
Number of pages20
JournalRenewable and Sustainable Energy Reviews
Volume111
DOIs
StatePublished - Sep 2019

Keywords

  • Aromatic chemicals
  • Catalytic depolymerization
  • Catalytic oxidation
  • Catalytic pyrolysis
  • Lignin
  • Thermochemical conversion

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