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Isotopic Tracing of Fuel Component Carbon in the Emissions From Diesel Engines
Technical Paper
2002-01-1942
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
Future Car Congress
Language:
English
Abstract
The addition of oxygenates to diesel fuel can reduce particulate emissions, but the underlying chemical pathways for the reductions are not understood. While measurements of particulate matter (PM), unburned hydrocarbons (HC), and carbon monoxide (CO) are routine, determining the contribution of carbon atoms in the original fuel molecules to the formation of these undesired exhaust emissions has proven difficult. Using accelerator mass spectrometry (AMS) diagnostics, carbon atoms in a specific bond position in a specific fuel molecule can be labeled with carbon-14 (14C) and traced through the combustion event to determine whether they reside in PM, HC, CO, CO2, or other emission products. This knowledge of how specific molecular structures produce certain emissions can be used to refine chemical-kinetic combustion models and to optimize fuel composition to reduce undesired emissions. Due to the high sensitivity of the technique and the lack of appreciable 14C in fossil fuels, fuels for AMS experiments can be labeled with such a small amount of 14C that they are not even considered radioactive.
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Authors
- Bruce A. Buchholz - Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory
- A. S. (Ed) Cheng - Mech. Engrg. Dept., University of California, Berkeley
- Robert W. Dibble - Mech. Engrg. Dept., University of California, Berkeley
- Charles J. Mueller - Engine Combustion Department, Sandia National Laboratories
- Glen C. Martin - Engine Combustion Department, Sandia National Laboratories
Topic
Citation
Buchholz, B., Cheng, A., Dibble, R., Mueller, C. et al., "Isotopic Tracing of Fuel Component Carbon in the Emissions From Diesel Engines," SAE Technical Paper 2002-01-1942, 2002, https://doi.org/10.4271/2002-01-1942.Also In
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