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Powering aircraft with 100% sustainable aviation fuel reduces ice crystals in contrails

Märkl, Raphael Satoru and Voigt, Christiane and Sauer, Daniel and Dischl, Rebecca Katharina and Kaufmann, Stefan and Harlass, Theresa and Hahn, Valerian and Roiger, Anke and Weiß-Rehm, Cornelius and Burkhardt, Ulrike and Schumann, Ulrich and Marsing, Andreas and Scheibe, Monika and Dörnbrack, Andreas and Renard, Charles and Gauthier, Maxime and Swann, Peter and Madden, Paul and Luff, Darren and Sallinen, Reetu and Schripp, Tobias and Le Clercq, Patrick (2023) Powering aircraft with 100% sustainable aviation fuel reduces ice crystals in contrails. Atmospheric Chemistry and Physics (ACP). Copernicus Publications. doi: 10.5194/egusphere-2023-2638. ISSN 1680-7316. (Submitted)

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Official URL: https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2638/

Abstract

Powering aircraft by sustainable aviation fuels (SAF) is a pathway to reduce the climate impact of aviation by lowering aviation life-cycle CO2 emissions and by reducing ice crystal numbers and radiative forcing from contrails. While the effect of SAF blends on contrails has been measured previously, here we present novel measurements on particle emission and contrails from 100 % SAF combustion. During the ECLIF3 (Emission and CLimate Impact of alternative Fuels) campaign, a collaboration between DLR, AIRBUS, ROLLS-ROYCE and NESTE, the DLR Falcon 20 research aircraft performed in situ measurements following an Airbus A350-941 source aircraft powered by Rolls-Royce Trent XWB-84 engines in 1 to 2 min old contrails at cruise altitudes. Apparent ice emission indices of 100 % HEFA-SPK (Hydro-processed Esters and Fatty Acids - Synthetic Paraffinic Kerosene) were measured and compared to Jet A-1 fuel contrails at similar engine and ambient ice-supersaturated conditions within a single flight. A 56 % reduction of ice particle numbers per mass of burned fuel was measured for 100 % HEFA-SPK compared to Jet A-1 at engine cruise conditions. The measured 35 % reduction in soot particle numbers suggest reduced ice activation by the low sulfur HEFA fuel. Contrail properties are consistently modelled with a contrail plume model. Global climate model simulations for the 2018 fleet conservatively estimate a 26 % decrease in contrail radiative forcing and stronger decreases for larger particle reductions. Our results indicate that higher hydrogen content fuels as well as clean engines with low particle emissions may lead to reduced climate forcing from contrails.

Item URL in elib:https://elib.dlr.de/199529/
Document Type:Article
Title:Powering aircraft with 100% sustainable aviation fuel reduces ice crystals in contrails
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Märkl, Raphael SatoruDLR, IPAhttps://orcid.org/0000-0002-0451-2084UNSPECIFIED
Voigt, ChristianeDLR, IPAhttps://orcid.org/0000-0001-8925-7731UNSPECIFIED
Sauer, DanielDLR, IPAhttps://orcid.org/0000-0002-0317-5063UNSPECIFIED
Dischl, Rebecca KatharinaDLR, IPAUNSPECIFIEDUNSPECIFIED
Kaufmann, StefanDLR, IPAhttps://orcid.org/0000-0002-0767-1996UNSPECIFIED
Harlass, TheresaDLR, IPAhttps://orcid.org/0000-0002-1792-6649UNSPECIFIED
Hahn, ValerianDLR, IPAUNSPECIFIEDUNSPECIFIED
Roiger, AnkeDLR, IPAUNSPECIFIEDUNSPECIFIED
Weiß-Rehm, CorneliusDLR, IPAUNSPECIFIEDUNSPECIFIED
Burkhardt, UlrikeDLR, IPAhttps://orcid.org/0000-0002-0742-7176UNSPECIFIED
Schumann, UlrichDLR, IPAhttps://orcid.org/0000-0001-5255-6869UNSPECIFIED
Marsing, AndreasDLR, IPAhttps://orcid.org/0000-0002-5006-2133UNSPECIFIED
Scheibe, MonikaDLR, IPAUNSPECIFIEDUNSPECIFIED
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216UNSPECIFIED
Renard, CharlesAirbus Operations SAS, Toulouse, FranceUNSPECIFIEDUNSPECIFIED
Gauthier, MaximeAirbus Operations SAS, Toulouse, FranceUNSPECIFIEDUNSPECIFIED
Swann, PeterRolls-Royce plc., Derby, UKUNSPECIFIEDUNSPECIFIED
Madden, PaulRolls-Royce plc., Derby, UKUNSPECIFIEDUNSPECIFIED
Luff, DarrenRolls-Royce plc., Derby, UKUNSPECIFIEDUNSPECIFIED
Sallinen, ReetuNeste Corporation, Innovation, Porvoo, FinlandUNSPECIFIEDUNSPECIFIED
Schripp, TobiasUNSPECIFIEDhttps://orcid.org/0000-0002-1594-7331UNSPECIFIED
Le Clercq, PatrickUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:21 November 2023
Journal or Publication Title:Atmospheric Chemistry and Physics (ACP)
Refereed publication:No
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.5194/egusphere-2023-2638
Publisher:Copernicus Publications
ISSN:1680-7316
Status:Submitted
Keywords:contrails, in situ measurements, ECLIF3, Sustainable Aviation Fuel, aviation, climate
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Air Transportation and Impact
DLR - Research area:Aeronautics
DLR - Program:L AI - Air Transportation and Impact
DLR - Research theme (Project):L - Climate, Weather and Environment, L - Components and Emissions
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics
Institute of Atmospheric Physics > Atmospheric Trace Species
Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics > Earth System Modelling
Institute of Atmospheric Physics
Institute of Combustion Technology
Institute of Combustion Technology > Multiphase flow and Alternative Fuels
Institute of Combustion Technology > Chemical Kinetics and Analytics
Deposited By: Märkl, Raphael Satoru
Deposited On:23 Nov 2023 11:27
Last Modified:23 Nov 2023 11:27

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