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RTX's Pratt & Whitney collaborates with FAA to study non-CO2 emissions under FAA ASCENT program
Tests will compare emissions from conventional Jet A and 100 per cent SAF
Pratt & Whitney, an RTX business and the Federal Aviation Administration (FAA) will work together with Missouri University of Science and Technology (Missouri S&T), Aerodyne Research, Inc., and the Environmental Protection Agency (EPA) to study non- CO2 aviation emissions, to help understand and reduce the environmental impact of those emissions. As part of the FAA's ASCENT program, the project will measure emissions from a Pratt & Whitney GTF™ engine combustor rig test stand using conventional Jet A and 100 per cent sustainable aviation fuel (SAF).
"As the aviation industry targets a goal of net-zero CO2 emissions by 2050, we continue to pay close attention to addressing the environmental impact of other emissions, including cruise non-volatile particulate matter and NOx," said Sean Bradshaw, senior technical fellow of sustainable propulsion at Pratt & Whitney. "Combustor rig tests with 100 per cent SAF provide a controlled environment for generating valuable baseline data, which will support future studies using full scale engines on-wing at ground and flight test conditions."
The project will compare emissions from Jet A kerosene and SAF comprised of 100 per cent Hydroprocessed Esters and Fatty Acids Synthetic Paraffinic Kerosene (HEFA-SPK), a biofuel derived from vegetable oils and animal fats; the fuel is supplied by World Energy.
"By bringing together expertise from industry, government, and academia, this project represents an important step towards understanding and reducing the environmental impacts of aviation, including those arising from non-CO2 emissions," said Dr. Philip Whitefield of Missouri University of Science and Technology. "SAF containing low sulfur and aromatic hydrocarbon concentrations could contribute to reduced sulfur dioxide and non-volatile particulate emissions, which are associated with contrail formation and the impact to global warming."
The rig tests will take place at Pratt & Whitney's facility in Middletown, Conn., using an advanced Rich-Quench-Lean (RQL) combustor. The rig allows testing of the full range of combustor operating conditions, including at take-off, ground, and cruise altitudes, to help understand the environmental and emissions benefits of using SAF. Pratt & Whitney, the FAA, Missouri S&T, Aerodyne Research, and the EPA will collaborate on test design, execution, and emissions data analysis.
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