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A Critical View on Catalytic Pyrolysis of Biomass
Author(s) -
Venderbosch R. H.
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500115
Subject(s) - deoxygenation , pyrolysis , catalysis , yield (engineering) , chemistry , biomass (ecology) , coke , organic chemistry , carbon fibers , chemical engineering , lignin , liquid fuel , materials science , combustion , metallurgy , oceanography , composite number , engineering , composite material , geology
The rapid heating of biomass in an oxygen‐free environment optimizes the yield of fast‐pyrolysis liquids. This liquid comprises a mix of acids, (dehydrated) carbohydrates, aldehydes, ketones, lignin fragments, aromatics, and alcohols, limiting its use. Deoxygenation of these liquids to replace hydrocarbons represents significant challenges. Catalytic pyrolysis is seen as a promising route to yield liquids with a higher quality. In this paper, literature data on catalytic fast pyrolysis of biomass are reviewed and deoxygenation results correlated with the overall carbon yield. Evidence is given that in an initial stage of the catalytic process reactive components are converted to coke, gas, and water, and only to a limited extent to a liquid product. Catalysts are not yet good enough, and an appropriate combination of pyrolysis conditions, reactive products formed, and different reactions to take place to yield improved quality liquids may be practically impossible.