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Evaluating the In-Service Emissions of High-Mileage Dedicated Methanol-Fueled Passenger Cars: Regulated and Unregulated Emissions

Author

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  • Sheng Su

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China
    Xiamen Environment Protection Vehicle Emission Control Technology Center, Xiamen 361023, China)

  • Yunshan Ge

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China)

  • Xin Wang

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China)

  • Mengzhu Zhang

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China)

  • Lijun Hao

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China)

  • Jianwei Tan

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China)

  • Fulu Shi

    (Beijing Vehicle Emissions Management Center, Beijing 100176, China)

  • Dongdong Guo

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China
    Beijing Vehicle Emissions Management Center, Beijing 100176, China)

  • Zhengjun Yang

    (National Laboratory of Automotive Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China)

Abstract

This paper reports the regulated, unregulated, and particle number emissions from six high-mileage, China-4 compliant, dedicated methanol taxis over the new European driving cycle. Compared to new vehicles, carbon monoxide, total hydrocarbons, and nitrogen oxides emissions from in-use methanol taxis increased by 76.1%, 40.2%, and 179.8%, respectively. Still, they managed to meet China-4, indicating good in-service conformity. In the test fleet, the test vehicles with longer mileage inclined to emit higher carbon monoxide and total hydrocarbons emissions. Formaldehyde emissions from these field-aged taxis ranged from 1.06 to 2.33 mg/km, which were similar to or lower than those from previously reported pre-Euro-5 gasoline vehicles. One of the six test vehicles produced extraordinarily high unburned methanol emissions, which was about ten times higher than the rest of the properly operating vehicles due to possible misfire, suggesting that unburned methanol will be the primary stress for future methanol applications. Compared to the regulated emissions, formaldehyde and unburned methanol emissions deteriorated at faster rates along with catalyst aging. Particle number emissions from these methanol taxis remained low even after high-mileage driving, suggesting the compatibility of methanol fueling in future particle number compliance.

Suggested Citation

  • Sheng Su & Yunshan Ge & Xin Wang & Mengzhu Zhang & Lijun Hao & Jianwei Tan & Fulu Shi & Dongdong Guo & Zhengjun Yang, 2020. "Evaluating the In-Service Emissions of High-Mileage Dedicated Methanol-Fueled Passenger Cars: Regulated and Unregulated Emissions," Energies, MDPI, vol. 13(11), pages 1-15, May.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2680-:d:363065
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    References listed on IDEAS

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    1. Wu, Zhicong & Xu, Gang & Zhang, Wentao & Xue, Xiaojun & Chen, Heng, 2023. "Thermodynamic and economic analysis of a new methanol steam reforming system integrated with CO2 heat pump and cryogenic separation system," Energy, Elsevier, vol. 283(C).
    2. Chao Jin & Xiaodan Li & Teng Xu & Juntong Dong & Zhenlong Geng & Jia Liu & Chenyun Ding & Jingjing Hu & Ahmed El ALAOUI & Qing Zhao & Haifeng Liu, 2023. "Zero-Carbon and Carbon-Neutral Fuels: A Review of Combustion Products and Cytotoxicity," Energies, MDPI, vol. 16(18), pages 1-29, September.
    3. Lyu, Liqun & Wang, Junfang & Yin, Hang & Ji, Zhongrui & Tan, Jianwei & Hao, Lijun & Ge, Yunshan, 2024. "Accelerated aging for after-treatment devices of diesel engine: Method, emission characteristics, and equivalence," Applied Energy, Elsevier, vol. 355(C).

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