Environmental assessment of biofuel pathways in Ile de France based on ecosystem modelling, including land-use change effectsReport as inadecuate




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* Corresponding author 1 EGC - Environnement et Grandes Cultures 2 Systèmes de pérennes - Performance des systèmes de culture des plantes pérennes

Abstract : The greenhouse gas GHG balance of biofuels largely hinges on the magnitude of nitrous oxide N2O emissions from arable soils during feedstock production, which are highly variable. Here, used an agro-ecosystem model to generate these emissions at a high resolution over the Ile-de-France region in Northern France, for a range of feedstocks. The emissions were input to a life-cycle assessment of candidate biofuel pathways: bioethanol from wheat and sugar-beet, biodiesel from oilseed rape, and ethanol from miscanthus. Compared to the widely-used methodology based on fixed emission factors, ecosystem modelling lead to 55% to 70% lower estimates for N2O emissions, emphasizing the importance of regional factors. The life-cycle GHG emissions of 1st generation biofuels were 50% to 70% lower than fossile-based equivalents, and 85% lower for cellulosic ethanol. Indirect land-use change effects negated these savings for bio-diesel and wheat ethanol, but were offset by direct effects for cellulosic ethanol.

Keywords : Biofuels Energy crops Greenhouse gas emissions Land-use change Life-cycle assessment





Author: Benoît Gabrielle - Nathalie Gagnaire - Rea Massad - Karine Dufossé - Cécile Bessou -

Source: https://hal.archives-ouvertes.fr/



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