PACIFIC will advance research on contrail mitigation and non-CO2 impacts

Airbus, within a consortium of 10 partners from four European countries, has launched PACIFIC, a project to study the impact of aviation's non-CO2 emissions on Local Air Quality and Climate with a focus on contrails. Recent studies suggest that using Sustainable Aviation Fuels (SAF) could reduce soot particles and contrail ice crystals. However, additional information on fuel composition and its processing in the engine is necessary to understand the effects and benefits of SAF better.

PACIFIC (Particle emissions, Air Quality and Climate Impact related to Fuel Composition and Engine Cycle) seeks to bridge the gap in understanding aviation's non-CO2 emissions by testing a range of fuels under controlled conditions. The project will ensure consistency in combustion parameters and hardware similarity from lab-scale experiments at the German Aerospace Center (DLR) to full aircraft engine tests at Airbus Toulouse.

The research will focus on understanding how soot forms during fuel combustion, using improved prediction tools to anticipate its presence in engine emissions better. It will also analyze the quantity of fine particles released at different engine power levels, refining methods to estimate their impact from ground tests to actual flight conditions. Another key aspect is assessing how these particles contribute to ice crystal formation, a significant factor in contrail development. Finally, the project will evaluate the broader climate effects of these emissions by examining how different fuel compositions and engine settings influence contrail formation and properties and their impact on global warming.

By consolidating these insights, PACIFIC will contribute to a cost-benefit assessment of various fuel options, providing inputs for potential future fuel-related regulations. The project will ultimately help define new fuel specifications aimed at reducing aviation's climate and air quality impact.

Airbus Chief Technology Officer Sabine Klauke stated, "Addressing aviation's non-CO2 emissions is critical in our journey toward truly sustainable flight. Through collaborative science-based approaches and innovative technologies, we're committed to minimising these effects while maintaining operational efficiency. The PACIFIC project will quantify and measure the non-CO2 emissions emitted from various SAF compositions. Using an innovative ground experiment process, we will be able to replicate conditions without delay and repeat them if needed. We look forward to the results of this multi-year project."

Project Partners:

Industry:
1) AIRBUS - France (coordinator)
2) ROLLS-ROYCE DEUTSCHLAND LTD & CO KG - RRDE, Germany
3) NESTE OYJ - NESTE, Finland
4) ROLLS-ROYCE PLC - RRUK, UK Research and technology organization:
1)DEUTSCHES ZENTRUM FUR LUFT - UND RAUMFAHRT EV - DLR, Germany
Universities:
1) JOHANNES GUTENBERG UNIVERSITY MAINZ - JGU, Germany
2) HELSINGIN YLIOPISTO - UHEL, Finland
3) THE MANCHESTER METROPOLITAN UNIVERSITY - MMU, UK
4) THE UNIVERSITY OF SHEFFIELD - USFD, UK Other:
1) ERDYN CONSULTANTS SAS - Erdyn, France.

(article source: Airbus / editor: Anton van Rijsbergen)