NOx Aromatics Effects in Catalyst-Equipped Gasoline Vehicles

Paper #:
  • 941869

Published:
  • 1994-10-01
Citation:
Le Jeune, A., McDonald, C., and Lee, R., "NOx Aromatics Effects in Catalyst-Equipped Gasoline Vehicles," SAE Technical Paper 941869, 1994, https://doi.org/10.4271/941869.
Pages:
18
Abstract:
Investigations into fuel compositional effects on emissions using model and full range fuels suggest aromatic components promote NOx conversion over the catalystSteady state results derived from a single engine (Ricardo Gasoline Fuels Consortium data) show that at a typical part load condition, the catalyst removes NOx less effectively with lower aromatic fuels. Neither CO nor H2 contribute significantly to catalyst performance.Two vehicles were tested over a European cycle. Toluene formed more combustion chamber NOx, offset by increased catalyst conversion efficiency giving lower tailpipe NOx than isooctane in the vehicle with the better catalyst light-off and AFR control.
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