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Suggested Citation:"5.0 Airport Emission Inventory Impact Analysis." National Academies of Sciences, Engineering, and Medicine. 2019. ACRP Web-Only Document 41: Alternative Jet Fuels Emissions: Quantification Methods Creation and Validation Report. Washington, DC: The National Academies Press. doi: 10.17226/25548.
Page 43

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Emissions Quantification Methodology Report: ACRP 02-80 Quantifying Emissions Reductions at Airports from the Use of Alternative Jet Fuel Emissions Quantification Methodology Report Page 43 5.0 Airport Emission Inventory Impact Analysis The impact quantification factor functions described in the previous section are developed for SAJF blends of conventional jet fuel types (i.e., Jet A, Jet A1, JP 8) which are used by jet and turboprop aircraft types (i.e., non-piston operations). The overall reduction in emissions of pollutant species from use of SAJF blended jet fuel at airports would therefore depend the number of non-piston operations relative to piston operations. To understand the variance in the potential overall reduction in emissions of pollutant species for various operations mix (i.e., piston to non-piston ratio) and SAJF blend percentages, emissions inventory impact analysis was conducted at twelve (12) airports using the AEDT. The twelve airports selected are representative of airports in the U.S. in terms of type (i.e., primary, non-primary), size (i.e., large-medium-small hubs, non-hubs, general aviation and reliever), and operational characteristics (piston to non-piston ratio). The results of the analysis for the three-key pollutants (i.e., CO, SOx and nvPM) are shown in Figure 12. The horizontal axis is the SAJF blend percentages and the vertical axis is the range of the potential reduction in pollutant emissions. The lower range is the reduction expected at airports with significant piston operations and very low non-piston operations. The upper range is the reduction expected at airports with significant non-piston operations and very low piston operations. Figure 12: Potential Reduction in Emission of Pollutant Species

Next: 6.0 Guidance to Use SAJF Impact Factors for Emissions Inventory and Dispersion Modeling at Airports »
ACRP Web-Only Document 41: Alternative Jet Fuels Emissions: Quantification Methods Creation and Validation Report Get This Book
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One of the most challenging environmental issues facing the aviation industry today is the impact of jet fuel emissions on the global climate. The use of sustainable alternative jet fuels (SAJF) to reduce aircraft emissions will become significantly more important in coming years. Capturing the air quality benefits in a way that is useful to airports requires understanding how SAJF reduce pollutant emissions, quantifying the reduction, and demonstrating the impact through an easy-to-use tool that airports can apply to their emissions inventories.

ACRP Web-Only Document 41: Alternative Jet Fuels Emissions: Quantification Methods Creation and Validation Report represents the second phase of this ACRP work. The first phase provided an understanding of how SAJF impacts aircraft emissions. This phase analyzes the data compiled in the report to quantify SAJF emission impacts.

Results of this analysis were subsequently used to develop a simplified tool that will allow airports to easily estimate emission reductions from use of SAJF at their airport. The Alternative Jet Fuel Assessment Tool and the Sustainable Alternative Jet Fuels and Emissions Reduction Fact Sheet are the two key products from ACRP 02-80.

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