Lignin Depolymerization and Conversion: A Review of Thermochemical Methods

The structure of lignin suggests that it can be a valuable source of chemicals, particularly phenolics. However, lignin depolymerization with selective bond cleavage is the major challenge for converting it into value‐added chemicals. Pyrolysis (thermolysis), gasification, hydrogenolysis, chemical o...

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Veröffentlicht in:Chemical engineering & technology Jg. 34; H. 1; S. 29 - 41
Hauptverfasser: Pandey, M. P., Kim, C. S.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Weinheim WILEY-VCH Verlag 01.01.2011
WILEY‐VCH Verlag
Wiley-VCH
Schlagworte:
Applied sciences
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Depolymerization
Exact sciences and technology
General and physical chemistry
Hydrogenolysis
Lignin
Lignocelluloses
Phenols
Pyrolysis
Reactors
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Hydrolysis
Pyrolysis
Heat treatment
Hydrogenolysis
Fuel
Cleavage
Gasification
Oxidation
Supercritical state
Catalyst
ISSN:0930-7516, 1521-4125
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Zusammenfassung:The structure of lignin suggests that it can be a valuable source of chemicals, particularly phenolics. However, lignin depolymerization with selective bond cleavage is the major challenge for converting it into value‐added chemicals. Pyrolysis (thermolysis), gasification, hydrogenolysis, chemical oxidation, and hydrolysis under supercritical conditions are the major thermochemical methods studied with regard to lignin depolymerization. Pyrolytic oil and syngases are the primary products obtained from pyrolysis and gasification. A significant amount of char is also produced during pyrolysis. Thermal treatment in a hydrogen environment seems very promising for converting lignin to liquid fuel and chemicals like phenols, while oxidation can produce phenolic aldehydes. Reaction severity, solvents, and catalysts are the factors of prime importance that control yield and composition of the product. An efficient and commercially competitive lignocellulosic biorefinery requires optimum utilization of all biomass components. Till date, lignin is the most underutilized component of a lignocellulosic biomass. However, lignin depolymerization with selective bond cleavage can convert it into various value‐added chemicals including monomeric phenols and phenolic aldehydes.
Bibliographie:ark:/67375/WNG-JT0BXX9Q-3
ArticleID:CEAT201000270
istex:57706BBB93434E23A61359B521653396C536DA1D
KIST
ISSN:0930-7516
1521-4125
DOI:10.1002/ceat.201000270