 A top-down approach to assess physical and ecological limits of biofuelsCarlos de Castro, Óscar Carpintero, Fernando Frechoso, Margarita Mediavilla and Luis J. de Miguel Energy, 2014, vol. 64, issue C, 506-512 Abstract: The aim of this article is to analyse the physical and ecological limits of biofuels (in particular, ethanol). To this end, three aspects are discussed. First of all, the territorial element, i.e., the real productivity of energy crops (in particular, ethanol), to show that, in general, the productivity is much lower than most of the literature on the subject suggests. Similarly, we then stress the high total territorial impact (the Ecological Footprint) associated with this kind of energy production. Thirdly, we offer data concerning the very modest nature of the energy balance of biofuels (EROEI) and their real power density, considering the productivity of the crops grown for biofuel. As a comparison, these three aspects are estimated for other forms of energy, in particular, photovoltaic energy. We conclude that when the set of estimated parameters has been analysed, there exist reasonable doubts concerning the use of biofuels on a regional and global scale, so they should not, in principle, be promoted as a renewable energy source, nor is it desirable on such a scale. Keywords: Biofuels potential; Energy return; Ecological footprint; Biofuels productivity (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:64:y:2014:i:c:p:506-512 DOI: 10.1016/j.energy.2013.10.049 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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