Environmental assessment of two pathways towards the use of biofuels in shipping

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• 作者：Selma Bengtsson^a ; ^{selma.bengtsson@chalmers.se} ; Erik Fridell^a ; ^b ; Karin Andersson^a
• 关键词：Biofuels ; Shipping ; Life cycle assessment
• 刊名：Energy Policy
• 出版年：2012
• 期刊代码：15_03014215
• 类别：pw
• 出版时间：May, 2012
• 卷：44
• 期：Complete
• 页码：451-463
• 文件大小：405 K

摘要

The goal of this study is to evaluate the life cycle performance of two alternative pathways to biofuels in the shipping industry: the 鈥榙iesel route鈥?and the 鈥榞as route鈥? The diesel route comprises of a shift from heavy fuel oil to marine gas oil and then a gradual shift to biodiesel, whereas the gas route comprises of a shift to liquefied natural gas and then a gradual shift to liquefied biogas. The two routes are assessed in a case study for the ferry traffic between the Swedish mainland and the island Gotland. Life cycle assessment (LCA) is used to evaluate the environmental performance with the functional unit chosen to be one year of ro-pax ferry service, including both passenger and goods transportation. The gas route is indicated to have better overall environmental performance than the diesel route. Furthermore, use of biofuels is illustrated as one possible measure to decrease the global warming impact from shipping, but to the expense of greater environmental impact for some other impact categories. As an example, the global warming potential (GWP₁₀₀) was shown to decrease with the use of biofuels in this study, while the eutrophication potential and the primary energy use increased.