Arizona State University scientists: planting the grass miscanthus on 23.2 million hectares of existing marginal agricultural lands could provide sufficient feedstock for bio-jetfuel.
a pathway toward full decarbonization of U.S. aviation fuel use by substituting conventional jet fuel with sustainably produced biofuels.
But what if we could make all U.S. air travel nearly emissions free? What if we could replace carbon-intensive jet fossil fuels with a cleaner alternative: biojet fuels derived from rain-fed grass grown in the U.S.?in the journal Nature Sustainability shows a pathway toward full decarbonization of U.S. aviation fuel use by substituting conventional jet fuel with sustainably produced biofuels.
The team then analyzed whether growing energy crop feedstocks on these lands would have detrimental effects on the surrounding climate or soil moisture and predicted the potential productivity of yields of two different grasses — miscanthus and switchgrass – as suitable biomass energy feedstocks. Finally, the team quantified the amount and the cost of biojet fuel that would be produced and distributed nationwide at scale.
To account for these land-atmosphere interactions, the research team took outputs from their hydroclimate model to inform their ecosystem model. The team then evaluated the economic feasibility for farmers to grow these grasses.For any uptake of an alternative energy pathway solutions need to make economic sense.
“These lands we identified are owned and operated by real people for different agricultural uses,” said Uludere Aragon, who is now a postdoctoral fellow at the Environmental Defense Fund. “The cost-effective biofuel potential from biomass feedstocks is influenced largely by the opportunity cost of alternative land uses.”
“This was an interdisciplinary team with expertise from ecosystems sciences, climate modeling and atmospheric sciences and economics,” said Georgescu, who acknowledged this research was a culmination of eight years of modeling work and collaboration. “To truly address sustainability concerns, you need the expert skills of a spectrum of domains. As academics, we should remember economics drives people’s decisions on the ground.
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