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BIOENERGY FOR EUROPE: WHICH ONES FIT BEST?

BIOENERGY FOR EUROPE: WHICH ONES FIT BEST?

138 7 Annex g NO 3 eq. /

138 7 Annex g NO 3 eq. / MJ useful energy 14 12 10 8 6 4 2 0 Summer smog – Greece 7.37 are subtracted due to system expansion Processing & Utilisation Agriculture/forestry part Fossil fuel life cycle Agricultural reference system SME Diesel Biogas Natural gas Straw Light oil Natural gas Concerning summer smog creation all biofuels under study prove to be advantageous compared to their fossil counterparts with the exception of straw versus light oil. Savings in the related emissions are 0.2 g Ethen eq./MJ useful energy in the case of biogas versus natural gas and 0.01 g Ethen eq./MJ useful energy in the case of SME versus diesel oil. Straw when it replaces natural gas results in savings of 0.006 g Ethen eq./MJ useful energy, while compared to light oil it emits 0.006 g Ethen eq./MJ useful energy more. Biogas proves to be the most favourable biofuel in this impact category. g Ethen eq. / MJ useful energy 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Processing & Utilisation Agriculture/forestry part Fossil fuel life cycle Agricultural reference system SME Diesel Biogas Natural gas Straw Light oil Natural gas

7.1 Country specific life cycle comparisons 139 Nitrous oxide – Greece All biofuels under study appear disadvantageous compared to their fossil counterparts concerning N2O emissions. The most disadvantageous one is SME, emitting 0.3 g N2O eq./MJ useful energy more than diesel oil mainly due N2O emissions from the application of nitrogen fertilisers and SME combustion. Straw results in increased emissions of 0.009 g N2O/MJ useful energy compared to both light oil and natural gas due to increased emissions during combustion. The least disadvantageous biofuel in this impact category is biogas, emitting 0.004 g N2O/MJ useful energy more than natural gas. The data for ozone depletion tend to have a high uncertainty (see chapter 4.1.2) and there fore these impact categories should not be included in the final assessment. g N 2O eq. / MJ useful energy 0.025 0.02 0.015 0.01 0.005 0 0.3 Human toxicity – Greece m 3 eq. / MJ useful energy 35000 30000 25000 20000 15000 10000 5000 0 Processing & Utilisation Agriculture/forestry part Fossil fuel life cycle Agricultural reference system SME Diesel Biogas Natural gas Straw Light oil Natural gas Processing & Utilisation Agriculture/forestry part Fossil fuel life cycle Agricultural reference system SME Diesel Biogas Natural gas Straw Light oil Natural gas

Bioenergy Update 10-02 - General*Bioenergy