Ozone-Forming Potential of Reformulated Gasoline

The Committee on Ozone-Forming Potential for Reformulated Gasoline was asked whether the existing body of scientific and technical information is sufficient to permit a robust evaluation and comparison of the emissions from motor vehicles using different reformulated gasolines based on their ozone-forming potentials and to assess the concomitant impact of that approach on air-quality benefits of the use of oxygenates within the RFG program. As part of its charge, the committee was asked to consider (1) the technical soundness of various approaches for evaluating and comparing the relative ozone-forming potentials of RFG blends, (2) technical aspects of various air-quality issues related to RFG assessment, and (3) the sensitivity of evaluations of the relative ozone-forming potentials to factors related to fuel properties and the variability of vehicle technologies and driving patterns. Table of Contents Front Matter Executive Summary 1 Introduction 2 Ozone Photochemistry 3 The Concept of Ozone-Forming Potential and Its Quantification 4 Motor Vehicles as a Source of Ozone Precursors 5 Reformulation of Gasoline 6 The Effects of Reformulated Gasoline on Ozone and Its Precursors 7 Using Ozone-Forming Potential to Evaluate the Relative Impacts of RFGs: A Case Study References Appendix A Biographical Information on Committee Members Appendix B Letter from Senator Lugar Appendix C Equation Set for the Complex Model - Phase II RFG Appendix D Data on Emissions from LDVs Using Fuels Selected from the AQIRP Study and the California Ethanol Testing Program