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Evaluation of emission characteristics of a stoichiometric natural gas engine fueled with compressed natural gas and biomethane

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  • Lee, Sangho
  • Yi, Ui Hyung
  • Jang, Hyungjoon
  • Park, Cheolwoong
  • Kim, Changgi

Abstract

In this study, the performance and emission characteristics of a stoichiometric natural gas engine were investigated using biomethane and compressed natural gas (CNG). The wide-open throttle (WOT) test and world harmonized transient cycle (WHTC) mode were conducted using a 11 L class six-cylinder natural gas engine that satisfies the emission standards of EURO-6. The biomethane contained 98.69% CH4 content and had a low calorific value of 39.46 MJ/Nm3 owing to the absence of C2–C4 hydrocarbons. In the WOT test, the engine performance deteriorated due to the poor combustion characteristics of biomethane. In particular, the thermal efficiency decreased by 2% when biomethane was used. The high CH4 content of biomethane increased the concentration of oxygenated hydrocarbons at the engine outlet. A total of 72%-76% of non-methane hydrocarbon (NMHC) was oxygenated in the WOT test using biomethane. In the WHTC mode, the emission standards of EURO-6 for nitrogen oxide, carbon monoxide, and NMHC were satisfied using biomethane. However, CH4 and ammonia emissions were higher than those specified in the EURO-6 emission standards when biomethane was used. Fuel consumption with biomethane was also 39.4% higher than that of CNG during the WHTC mode.

Suggested Citation

  • Lee, Sangho & Yi, Ui Hyung & Jang, Hyungjoon & Park, Cheolwoong & Kim, Changgi, 2021. "Evaluation of emission characteristics of a stoichiometric natural gas engine fueled with compressed natural gas and biomethane," Energy, Elsevier, vol. 220(C).
    • Handle: RePEc:eee:energy:v:220:y:2021:i:c:s0360544221000153
    DOI: 10.1016/j.energy.2021.119766
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    2. Pei, Zhongwen & Liu, Kaimin & Luo, Wusheng & Yang, Jing & Li, Yangtao, 2023. "Experimental study on the effect of aftertreatment system on the energy flow pattern and emission reduction of a natural gas engine under world harmonized transient cycle," Energy, Elsevier, vol. 263(PB).
    3. Legrand, Mathieu & Labajo-Hurtado, Raúl & Rodríguez-Antón, Luis Miguel & Doce, Yolanda, 2022. "Price arbitrage optimization of a photovoltaic power plant with liquid air energy storage. Implementation to the Spanish case," Energy, Elsevier, vol. 239(PA).
    4. Felipe Solferini de Carvalho & Luiz Carlos Bevilaqua dos Santos Reis & Pedro Teixeira Lacava & Fernando Henrique Mayworm de Araújo & João Andrade de Carvalho Jr., 2023. "Substitution of Natural Gas by Biomethane: Operational Aspects in Industrial Equipment," Energies, MDPI, vol. 16(2), pages 1-19, January.
    5. Michel Noussan, 2023. "The Use of Biomethane in Internal Combustion Engines for Public Transport Decarbonization: A Case Study," Energies, MDPI, vol. 16(24), pages 1-18, December.
    6. Artur Jaworski & Hubert Kuszewski & Krzysztof Balawender & Paweł Woś & Krzysztof Lew & Mirosław Jaremcio, 2024. "Assessment of CH 4 Emissions in a Compressed Natural Gas-Adapted Engine in the Context of Changes in the Equivalence Ratio," Energies, MDPI, vol. 17(9), pages 1-18, April.
    7. Krzysztof Biernat & Izabela Samson-Bręk & Zdzisław Chłopek & Marlena Owczuk & Anna Matuszewska, 2021. "Assessment of the Environmental Impact of Using Methane Fuels to Supply Internal Combustion Engines," Energies, MDPI, vol. 14(11), pages 1-19, June.
    8. Yang, Xiyu & Dong, Quan & Wang, Xiaoyan & Zhou, Tanqing & Wei, Daijun, 2023. "An experimental study on the needle valve motion characteristics of high pressure natural gas and diesel co-direct injector," Energy, Elsevier, vol. 265(C).

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