Drop-in biofuel production via conventional (lipid/fatty acid) and advanced (biomass) routes. Part I

Journal Article · Mon Jan 23 00:00:00 EST 2017 · Biofuels, Bioproducts & Biorefining

DOI:https://doi.org/10.1002/bbb.1746· OSTI ID:1346341

Karatzos, Sergios ^[1]; van Dyk, J. Susan ^[1]; McMillan, James D. ^[2]; Saddler, Jack ^[1]

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1. Univ. of British Columbia, Vancouver, BC (Canada)
2. National Renewable Energy Lab. (NREL), Golden, CO (United States)

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. Moreover, 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.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office (BETO)
• Grant/Contract Number: AC36-08GO28308
• OSTI ID: 1346341
• Report Number(s): NREL/JA-5100-67681
• Journal Information: Biofuels, Bioproducts & Biorefining, Vol. 11, Issue 2; ISSN 1932-104X
• Publisher: Wiley
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
drop-in biofuels
bioconversion
thermochemical/biochemical conversion
conventional/advanced biofuels
biojet