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Techno-economic analysis of a smart use of low-soot aviation fuels – options and cost
Citation Link: https://doi.org/10.15480/882.5158
Publikationstyp
Conference Poster not in Proceedings
Date Issued
2023-05-24
Sprache
English
Author(s)
TORE-DOI
Citation
Technische Universität Hamburg (2023)
Peer Reviewed
false
Renewably sourced aviation fuels (“SAF”) can reduce GHG emissions by 50 %-90 % on a lifecycle basis. However, the aviation-induced climate impact is only partially caused by GHG emissions, a significant fraction can be attributed to contrail formation and NOx emissions, amongst others. The formation of contrails is substantially influenced by soot formation during combustion. It has been demonstrated that an increased hydrogen content, e.g., by using SAF or hydroprocessed fossil-based kerosene, can reduce soot formation. Studies have shown that between 2 % and 10 % of the flights cause almost 80 % of the contrail energy forcing. However, the market share of renewably sourced aviation fuels is presently far below 1 %, and requirements for hydroprocessing of fossil-based kerosene do not exist.
Against this background, using “low-soot” fuels exclusively where contrails form appears promising. However, this would require dedicated fuel supply chains, e.g., to accommodate two different fuel types at one airport. This study aims to assess the techno-economical feasibility of such concepts. Fuel production costs are derived for varying degrees of hydroprocessing severity and all major SAF production pathways, such as HEFA-SPK, FT-SPK, and AtJ-SPK. Fuel allocation concepts are assessed from a uniform distribution towards a dedicated use on particular flight segments by estimating associated costs and potential durations for their implementation. In comparison with market-ramp-up scenarios for such “low-soot fuels”, the mitigation potential of various fuel allocation concepts is discussed. Hereby, this study aims to contribute towards the design of measures to effectively and swiftly reduce the overall climate impact of aviation.
Against this background, using “low-soot” fuels exclusively where contrails form appears promising. However, this would require dedicated fuel supply chains, e.g., to accommodate two different fuel types at one airport. This study aims to assess the techno-economical feasibility of such concepts. Fuel production costs are derived for varying degrees of hydroprocessing severity and all major SAF production pathways, such as HEFA-SPK, FT-SPK, and AtJ-SPK. Fuel allocation concepts are assessed from a uniform distribution towards a dedicated use on particular flight segments by estimating associated costs and potential durations for their implementation. In comparison with market-ramp-up scenarios for such “low-soot fuels”, the mitigation potential of various fuel allocation concepts is discussed. Hereby, this study aims to contribute towards the design of measures to effectively and swiftly reduce the overall climate impact of aviation.
DDC Class
600: Technik
620: Ingenieurwissenschaften
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