Premium
Drop‐in biofuel production via conventional (lipid/fatty acid) and advanced (biomass) routes. Part I
Author(s) -
Karatzos Sergios,
van Dyk J. Susan,
McMillan James D.,
Saddler Jack
Publication year - 2017
Publication title -
biofuels, bioproducts and biorefining
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.931
H-Index - 83
eISSN - 1932-1031
pISSN - 1932-104X
DOI - 10.1002/bbb.1746
Subject(s) - biofuel , jet fuel , aviation biofuel , renewable fuels , biodiesel , hydrothermal liquefaction , lignocellulosic biomass , renewable energy , environmental science , hydrodeoxygenation , biomass (ecology) , diesel fuel , waste management , pulp and paper industry , biochemical engineering , chemistry , bioenergy , catalysis , engineering , organic chemistry , agronomy , biology , electrical engineering , selectivity
Drop‐in biofuels that are ‘functionally identical to petroleum fuels and fully compatible with existing infrastructure’ are needed for sectors such as aviation where biofuels such as bioethanol/biodiesel cannot be used. The technologies used to produce drop‐in biofuels can be grouped into the four categories: oleochemical, thermochemical, biochemical, and hybrid technologies. Commercial volumes of conventional drop‐in biofuels are currently produced through the oleochemical pathway, to make products such as renewable diesel and biojet fuel. However, the cost, sustainability, and availability of the lipid/fatty acid feedstocks are significant challenges that need to be addressed. In the longer‐term, it is likely that commercial growth in drop‐in biofuels will be based on lignocellulosic feedstocks. However, these technologies have been slow to develop and have been hampered by several technoeconomic challenges. For example, the gasification/Fischer‐Tropsch ( FT ) synthesis route suffers from high capital costs and economies of scale difficulties, while the economical production of high quality syngas remains a significant challenge. Although pyrolysis/hydrothermal liquefaction ( HTL ) based technologies are promising, the upgrading of pyrolysis oils to higher specification fuels has encountered several technical challenges, such as high catalyst cost and short catalyst lifespan. Biochemical routes to drop‐in fuels have the advantage of producing single molecules with simple chemistry. However, the high value of these molecules in other markets such as renewable chemical precursors and fragrances will limit their use for fuel. In the near‐term, (1–5 years) it is likely that, ‘conventional’ drop‐in biofuels will be produced predominantly via the oleochemical route, due to the relative simplicity and maturity of this pathway. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd