Chalmers Conferences, LCM 2013

USING LCA AS A TOOL TO REGULATE BIOFUELS – A CONSIDERATION OF UNCERTAINTIES IN CULTIVATION
Serina Ahlgren, Elin Röös

Last modified: 2014-09-11

Abstract


According to the EU Renewable Energy Directive, biofuels must reduce
GHG emissions with at least 35% compared to fossil fuel. Cultivation of
raw material represents a large proportion of biofuels´ GHG emissions,
however these emissions are associated with major uncertainties. The aim of
this paper is to study the uncertainty in GHG emissions for ethanol,
considering measuring uncertainty and variability in data for wheat
cultivation in Sweden. The results show that uncertainty in emissions from
cultivation is large, but when using bioenergy as a process fuel in the
ethanol production, the risk of exceeding the savings threshold is small.
However, there are many uncertainties to be considered; the Directive does
for example presently not include indirect land use change.

Keywords


EU; biofuels; GHG; sustainability criteria; uncertainty

References


Ahlgren, S., Röös, E., Di Lucia, L., Sundberg, C., Hansson, P.-A. 2012. EU sustainability criteria for biofuels:
uncertainties in GHG emissions from cultivation. Biofuels, 3(4), 399-411.

Björklund, A. 2002. Survey of approaches to improve reliability in lca. The International Journal of Life Cycle
Assessment, 7(2), 64-72.

Johnson, D.R., Willis, H.H., Curtright, A.E., Samaras, C., Skone, T. 2011. Incorporating uncertainty analysis
into life cycle estimates of greenhouse gas emissions from biomass production. Biomass and Bioenergy,
35(7), 2619-2626.

Spielmann, M., Scholz, R., Tietje, O., Haan, P. 2005. Scenario Modelling in Prospective LCA of Transport
Systems. Application of Formative Scenario Analysis (11 pp). The International Journal of Life Cycle
Assessment, 10(5), 325-335.


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