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Experimental and numerical study on NOx and CO emission characteristics of dimethyl ether/air jet diffusion flame

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  • Kang, Yinhu
  • Wang, Quanhai
  • Lu, Xiaofeng
  • Wan, Hu
  • Ji, Xuanyu
  • Wang, Hu
  • Guo, Qiang
  • Yan, Jin
  • Zhou, Jinliang

Abstract

Dimethyl ether (DME) is one of the most promising alternative fuels emerging in the past few decades. At present, DME is mainly applied to the compression ignition (CI) engines, and numerous studies showed its superior performances in CI engines versus the traditional fuels. More recently, DME was also introduced into the field of industrial boiler to solve the pollution problem raised by coal usage. But the emission behavior of DME in this type of combustion system was not studied as thoroughly. In this paper, experiments and simulations are conducted to study the NOx and CO emission characteristics of the DME/air jet diffusion flame, which may be valuable for design and operation of the DME-fueled industrial boilers. During the measurements, a series of fuel jet velocities (uf) and air co-flow velocities (uco) were designed for the experiments to investigate their effects on NOx and CO emission indices systematically. Additionally, the CFD–CRN method was also employed to analyze NOx formation characteristics in different regions of the flame. The conversion relationship between the nitrogenous species (including NO, NO2, HCN, etc.), NOx formation and consumption pathways, and NOx and CO emission indices of the DME/air jet diffusion flame were analyzed by reaction rate and sensitivity analyses.

Suggested Citation

  • Kang, Yinhu & Wang, Quanhai & Lu, Xiaofeng & Wan, Hu & Ji, Xuanyu & Wang, Hu & Guo, Qiang & Yan, Jin & Zhou, Jinliang, 2015. "Experimental and numerical study on NOx and CO emission characteristics of dimethyl ether/air jet diffusion flame," Applied Energy, Elsevier, vol. 149(C), pages 204-224.
    • Handle: RePEc:eee:appene:v:149:y:2015:i:c:p:204-224
    DOI: 10.1016/j.apenergy.2015.03.135
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    1. Wan, Huaxian & Gao, Zihe & Ji, Jie & Zhang, Yongming & Li, Kaiyuan, 2018. "Experimental and theoretical study on flame front temperatures within ceiling jets from turbulent diffusion flames of n-heptane fuel," Energy, Elsevier, vol. 164(C), pages 79-86.
    2. Zeng, Guang & Zhou, Anqi & Fu, Jinming & Ji, Yang, 2022. "Experimental and numerical investigations on NOx formation and reduction mechanisms of pulverized-coal stereo-staged combustion," Energy, Elsevier, vol. 261(PB).
    3. Wang, Qiang & Tang, Fei & Zhou, Zheng & Liu, Huan & Palacios, Adriana, 2017. "Flame height of axisymmetric gaseous fuel jets restricted by parallel sidewalls: Experiments and theoretical analysis," Applied Energy, Elsevier, vol. 208(C), pages 1519-1526.
    4. Kan, Xiang & Zhou, Dezhi & Yang, Wenming & Zhai, Xiaoqiang & Wang, Chi-Hwa, 2018. "An investigation on utilization of biogas and syngas produced from biomass waste in premixed spark ignition engine," Applied Energy, Elsevier, vol. 212(C), pages 210-222.
    5. Lee, Seungro & Shin, Cheol Hee & Choi, Sun & Kwon, Oh Chae, 2018. "Characteristics of NOx emissions of counterflow nonpremixed water-laden methane/air flames," Energy, Elsevier, vol. 164(C), pages 523-535.
    6. Kang, Yinhu & Wei, Shuang & Zhang, Pengyuan & Lu, Xiaofeng & Wang, Quanhai & Gou, Xiaolong & Huang, Xiaomei & Peng, Shini & Yang, Dong & Ji, Xuanyu, 2017. "Detailed multi-dimensional study on NOx formation and destruction mechanisms in dimethyl ether/air diffusion flame under the moderate or intense low-oxygen dilution (MILD) condition," Energy, Elsevier, vol. 119(C), pages 1195-1211.

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