Gasoline Simulated Distillation Profiles of U.S. Market Gasoline and Impacts on Vehicle Particulate Emissions

2023-01-1632

10/31/2023

Features
Event
Energy & Propulsion Conference & Exhibition
Authors Abstract
Content
A gasoline’s distillation profile is directly related to its hydrocarbon composition and the volatility (boiling points) of those hydrocarbons. Generally, the volatility profiles of U.S. market fuels are characterized using a very simple, low theoretical plate distillation separation, detailed in the ASTM D86 test method. Because of the physical chemistry properties of some compounds in gasoline, this simple still or retort distillation has some limitations: separating azeotropes, isomers, and heavier hydrocarbons. Chemists generally rely on chromatographic separations when more detailed and precise results are needed.
High-boiling aromatic compounds are the primary source of particulate emissions from spark ignited (SI), internal combustion engines (ICE), hence a detailed understanding and high-resolution separation of these heavy compounds is needed. This paper presents analysis of 159 U.S. market gasoline samples using D86 distillation and ASTM D6730 detailed hydrocarbon analysis (DHA). The samples ranged in Particulate Matter Index (PMI) from 0.925 to 2.540 or Particulate Evaluation Index (PEI) of 0.584 to 2.715. Additional analysis was performed on 80 of the samples using ASTM D7096, a chromatographic method, to generate higher resolution simulated distillation (SimDis) profiles. SimDis cutpoints (%-off values) in the range of T95 to T98 show good correlation to PMI and PEI, demonstrating that SimDis analysis can provide a useful assessment of the PM-formation tendency of market gasolines.
Meta TagsDetails
DOI
https://doi.org/10.4271/2023-01-1632
Pages
9
Citation
Geng, P., Butler, A., Studzinski, W., Salyers, J. et al., "Gasoline Simulated Distillation Profiles of U.S. Market Gasoline and Impacts on Vehicle Particulate Emissions," SAE Technical Paper 2023-01-1632, 2023, https://doi.org/10.4271/2023-01-1632.
Additional Details
Publisher
Published
Oct 31, 2023
Product Code
2023-01-1632
Content Type
Technical Paper
Language
English