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A review on fundamental combustion characteristics of syngas mixtures and feasibility in combustion devices

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出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.rser.2021.111178

关键词

Syngas; Laminar burning velocity; Burners

资金

  1. Indian Institute of Technology Bombay
  2. Department of Science and Technology, Government of India [YSS_2015_000007]
  3. Department of Space, Government of India
  4. Ministry of Human Resources Development, India, through the Indian Institute of Technology Bombay

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Syngas is a promising alternative fuel with clean combustion and lower greenhouse gas emissions, but its wide compositional variability poses challenges in the development of burners and combustion chambers. Recent research focuses on fundamental combustion characteristics of syngas, such as laminar and turbulent burning velocity, and the comparison of prediction capabilities using different reaction mechanisms.
Syngas is a promising alternative fuel due to clean combustion with lower greenhouse gas emissions. The multicomponent fuel mixture primarily consists of hydrogen, carbon monoxide, nitrogen, carbon dioxide and traces of moisture. The composition of syngas strongly depends on the feedstock and the choice of production method. The wide compositional variability of syngas poses hurdles in developing appliances such as burners and combustion chambers. This review summarizes the recent research on syngas' fundamental combustion characteristics, such as laminar and turbulent burning velocity. The burning velocity prediction capabilities of various reaction mechanisms were analyzed. Comparing the laminar burning velocity predictions using different kinetic schemes with available experimental data in the literature establishes the validity of kinetic schemes. A considerable discrepancy is observed between the experimental data and the present numerical predictions for elevated temperatures at different equivalence ratios. The recent developments in syngas burners, stability regimes, and the need for laminar/turbulent burning velocity data at high temperatures and pressure to improve computational modeling of industrial syngas burners are emphasized. The existing research gap in burners to accommodate syngas with the higher mole fraction of hydrogen is also explored.

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