Emission characteristics of a novel low NOx burner fueled by hydrogen-rich mixtures with methane
Abstract
The use of hydrogen-rich fuels may be challenging for burner designers due to unique properties of hydrogen comparedto conventional fuels such as natural gas. Burner retrofit may be required to use hydrogen-enriched fuels in combustionsystems that are designed for natural gas combustion. This study aimed to experimentally investigate NOx emissionsfrom a novel low NOx burner fueled by methane-hydrogen mixtures. The burner was tested in a cylindrical combustionchamber at atmospheric pressure. Burner thermal load of 25 kW (LHV) and air-fuel equivalence ratio of 1.15 weremaintained throughout the experimental campaign. The influence of burner design parameters on NOx emissions wastested for various fuel compositions using a statistically cognizant experimental design. The study revealed that shiftingthe burner head upstream can deliver NOx emission reduction. In contrast, supplying fuel to the burner through secondaryfuel ports increases NOx emissions, particularly when the burner head is shifted upstream. The lowest predictedNOx emissions from the burner are below 9 ppmvd at 3% of O2 and 14 ppmvd at 3% of O2 for 5% and 30% massfraction of hydrogen in the fuel, respectively.References
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[2] C.E. Baukal, The John Zink Combustion Hamworthy Handbook, Vol. 1, CRC Press, Tulsa, OK, USA, pp. 52-54
[3] M. Ditaranto, R. Anantharaman; T. Weydahl, Performance and NOx emissions of refinery fired heaters retrofitted to hydrogen combustion, Energy Procedia 37 (2013) 7214–7220.
[4] M. Dutka, M. Ditaranto, T. Løvås, Application of a Central Composite Design for the Study of NOx Emission Performance of a Low NOx Burner, Energies 8 (2015) 3606-3627.
[5] P. Bělohradský, V. Kermes, Experimental study on NOx formation in gas-staged burner based on the design of experiments. Chemical Engineering Transactions 29 (2012) 79–84.
[6] G. Box, K. Wilson, Journal of the Royal Statistical Society. Series B (Methodological) 13 (1951), 1–45.
[7] G.E.P. Box, J.S. Hunter, W.G. Hunter, Statistics for Experimenters: Design, Innovation, and Discovery; Wiley-Interscience: Hoboken, NJ, 2005; pp 47, 455.
[8] C.P. Doncaster, A. J.H. Davey, Analysis of Variance and Covariance: How to Choose and Construct Models for the Life Sciences; Cambridge University Press: Cambridge, 2007; pp 1-14, 238.
[9] R. L. Mason, R.F. Gunst, J.L. Hess, Statistical Design and Analysis of Experiments With Applications to Engineering and Science; 2nd ed.; John Wiley & Sons: New York, 2003; pp 194-195, 504-507.
[10] European Commission, IPPC Reference Document on Best Available Techniques for Mineral Oil and Gas Refineries, 2003
Published
2015-07-16
How to Cite
DUTKA, Marcin; DITARANTO, Mario; LØVÅS, Terese.
Emission characteristics of a novel low NOx burner fueled by hydrogen-rich mixtures with methane.
Journal of Power Technologies, [S.l.], v. 95, n. 2, p. 105--111, july 2015.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/694>. Date accessed: 21 dec. 2024.
Issue
Section
Combustion and Fuel Processing
Keywords
low-NOx burner; hydrogen enrichment; nitrogen oxides; central composite design; bluff body
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