Simultaneous measurements of aromatic hydrocarbons in exhaust using a laser ionization method

Hiroyuki Yamada, Kentaro Misawa, Masaaki Fujii, Koichi Tanaka, Daisuke Suzuki, Jun Matsumoto, Kotaro Tanaka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A simultaneous multi-composition analyzing (SMCA) resonance enhanced multi-photon ionization (REMPI) system was used to investigate gasoline engine exhaust. Observed peaks for exhaust were smaller mass numbers than those from diesel exhaust. However, large species up to three ring aromatics were observed suggesting that soot precursor forms even in the gasoline engine. At low catalyst temperature condition, the reduction efficiencies of a three-way catalyst were higher for higher mass numbers. This result indicates that the larger species accumulate in the catalyst or elsewhere due to their lower vapor pressures. To evaluate the emission of low volatility species, the accumulation should be taken into account. In the hot mode, reduction efficiencies for aromatic species of three-way catalyst were almost 99.5% however, they fall to 70% in the cold start condition.

Original languageEnglish
Pages (from-to)226-234
Number of pages9
JournalSAE International Journal of Engines
Volume2
Issue number2
DOIs
Publication statusPublished - 2010 Jun 8

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ASJC Scopus subject areas

  • Automotive Engineering
  • Fuel Technology

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