Motor vehicle emission factors of NMHC, CO, NOx and VOCs pattern in photochemical reactions inside the tunnel

Jiun-Horng Tsai, Yih Chyun Hsu, Huan Wen Chen, Wen Yinn Lin

Research output: Contribution to conferencePaperpeer-review

5 Citations (Scopus)

Abstract

Motor vehicle emission factors of CO, NO x and nonmethane hydrocarbons (NMHC) were measured inside the Chung-Cheng Tunnel of Kaohsiung in Taiwan. The results were compared with the corresponding values calculated by Mobile Taiwan-1.0 and Mobile-5b models. Concentrations of individual hydrocarbon species were also determined, and reactivity of organic species from motor vehicles calculated through use of MIR scale. Results show that the average emission factors of CO, NHMC, and NO x inside the Chung-Cheng Tunnel were 6.25, 1.51, and 1.02g/veh-km, respectively. The error range of the emission factors was 45%. Concentrations of isopentane, 2-methylpentane, benzene and toluene are the dominant species. Emission factors predicted by Mobile Taiwan-1.0 were much higher than those actually measured. However, values predicted by Mobile-5b did closely match the observed data. The MIR/VOCs ratios found inside the Tunnel differ significantly from those reported for Fort McHenry Tunnel and Tuscarora Tunnel, which is probably due to difference in driving patterns and fuel compositions.

Original languageEnglish
Publication statusPublished - 1998 Dec 1
EventProceedings of the 1998 91st Annual Meeting & Exposition of the Air & Waste Management Association - San Diego, CA, USA
Duration: 1998 Jun 141998 Jun 18

Other

OtherProceedings of the 1998 91st Annual Meeting & Exposition of the Air & Waste Management Association
CitySan Diego, CA, USA
Period98-06-1498-06-18

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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