New Oil Sugarcane to Produce Bio-Jet Fuel

Airline industry could fly thousands of miles on biofuel from promising new feedstock that may replace ethanol.

A Boeing 747 plane burns 1 gal. of jet fuel per second. A recent analysis from researchers at the University of Illinois estimated that this aircraft could fly for 10 hours on bio-jet fuel produced on 54 acres of specially engineered sugarcane.

The Plants Engineered to Replace Oil in Sugarcane & Sweet Sorghum (PETROSS) project, funded by the Advanced Research Projects Agency-Energy (ARPA-E), has developed sugarcane that produces oil, called lipidcane, that can be converted into biodiesel or jet fuel in place of sugar that is currently used for ethanol production. With 20% oil — the theoretical limit — all of the sugar in the plant would be replaced by oil.

“Oil-to-Jet is one of the direct and efficient routes to convert bio-based feedstocks to jet fuel,” said Vijay Singh, director of the Integrated Bioprocessing Research Laboratory and professor in the University of Illinois department of agricultural and biological engineering. “Reducing the feedstock cost is critical to improving process economics of producing bio-jet fuel. Lipidcane allows us to reduce feedstock cost.”

This research analyzed the economic viability of crops with different levels of oil. Lipidcane with 5% oil produces four times more jet fuel (1,577 liters, or 416 gal.) per hectare than soybeans. Sugarcane with 20% oil produces more than 15 times more jet fuel (6,307 liters, or 1,666 gal.) per hectare than soybeans.

Deepak Kumar, a postdoctoral researcher at the University of Illinois, and Vijay Singh, Director of the Integrated Bioprocessing Research Laboratory, led work to show the economic viability of a promising new feedback to produce sustainable bio-jet fuel. Source : Claire Benjamin/University of Illinois.

“PETROSS sugarcane is also being engineered to be more cold tolerant, potentially enabling it to be grown on an estimated 23 million acres of marginal land in the southeastern U.S.,” said PETROSS director Stephen Long, the Gutgsell endowed professor of plant biology and crop sciences at the university’s Carl R. Woese Institute for Genomic Biology. “If all of this acreage was used to produce renewable jet fuel from lipidcane, it could replace about 65% of national jet fuel consumption.”

“We estimate that this biofuel would cost the airline industry $5.31/gal., which is less than most of the reported prices of renewable jet fuel produced from other oil crops or algae,” said Deepak Kumar, postdoctoral researcher in the University of Illinois department of agricultural and biological engineering and lead analyst on the study.

This crop also produces profitable co-products: A hydrocarbon fuel is produced along with the bio-jet fuel or biodiesel that can be used to produce various bioproducts. The remaining sugar (for plants with less than 20% oil) could be sold or used to produce ethanol. In addition, biorefineries could use lipidcane bagasse to produce steam and electricity to become self-sustainable for their energy needs and provide surplus electricity, thus offering environmental benefits by displacing electricity produced with fossil fuels.

The paper — “Biorefinery for Combined Production of Jet Fuel & Ethanol from Lipid-producing Sugarcane: A Techno-economic Evaluation” — was published by Global Change Biology Bioenergy.

PETROSS is a research project aiming to transform sugarcane and sweet sorghum to naturally produce large amounts of oil, creating a sustainable source of biofuel. PETROSS is supported by ARPA-E, which funds initial research for high-impact energy technologies to show proof of concept before private-sector investment.

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