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Aerosols emitted by aircraft engines promote cloud formation (expressed as a track cloud), and by interacting with solar radiation and changing the water content in the atmosphere, the track cloud can have an impact on the climate. There have been studies in the past to assess the potential of sustainable bio-aviation kerosene to reduce pollutant emissions, but past tests have been carried out on the ground, while ground-engined conditions are very different from those in flight.
Richard Moore of the NASA Langley Research Center in Virginia and colleagues reported aerial measurements of the test aircraft's pollutant emissions. The four engines of the test aircraft were either added with regular Jet A aviation kerosene or mixed with Jet A. Aviation kerosene and biofuels (from linseed oil). The researchers performed observations on a research machine. The research aircraft flew behind the test aircraft. The distance between the two was about 30 to 150 meters and the altitude was 30,000 to 36,000 feet (9140 to 10,970 meters).
Moreover, the researchers say that the aerosol emissions from mixed biofuels are significantly lower than conventional fuels, but the reduction in high thrust conditions is not as pronounced as in the case of medium to low thrust. The experiment also provides information on the type of aerosol particles emitted, which can help model studies to assess whether the use of aviation biofuels is a viable strategy to promote climate change mitigation.
Aviation biofuels can reduce pollutant emissions
Recently, a study published in Nature showed that in cruise situations, the combined use of conventional fuels and biofuels can reduce the particulate pollutant emissions of aircraft engines by 50-70% compared to the use of conventional fuels. The discovery brings important data on the environmental impact of the use of biofuels by aircraft in flight, which has not been previously reported, and may help to assess the use of aviation biofuels as a viable strategy for mitigating climate change. potential.