Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 23, Pages 12188-12199Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.03.103
Keywords
Syngas; Laminar burning velocity; Linear correlation; Temperature exponent
Categories
Funding
- Government of India
- Cummins Technologies India Pvt. Limited (CTIL), Cummins India Limited
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The laminar burning velocity of nine different syngas compositions has been measured at elevated temperatures (350-650 K) for various equivalence ratios using an externally heated diverging channel method. The measured values are compared with the predictions of two detailed kinetic models (GRI 3.0 and FFCM-1). The predictions of FFCM-1 for various syngas (H-2/CO/CH4/CO2/N-2) mixtures accurately capture the fundamental combustion characteristics, and GRI 3.0 mechanism overpredicts the laminar burning velocity for fuel rich syngas compositions. Temperature exponents mildly decrease with increase in equivalence ratio for mixtures investigated in the present work. Two correlations, one using linear regression, and another, a linear equation model is proposed to predict the laminar burning velocity accurately for various syngas compositional modifications. The developed linear model can be used for direct calculation of laminar burning velocities of different syngas compositions. Similarly, a temperature exponent correlation and its comparison with present measurements and simulations are also presented. The efficacy of the proposed models is evaluated through a detailed comparison with the literature. The model provides an excellent matching for following syngas compositions; 0.05 < X-H2 < 0.50, 0.08 < X-CO < 0.50, 0 < X-CH4 < 0.13, 0 < X-CO2 < 0.50, 0 < X-N2 < 0.65, for an equivalence ratio of phi = 0.7-1.25, and mixture temperature from 300 to 650 K. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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