Magnesium/air combustion at pilot scale and subsequent PM and NOx emissions

Patxi Garra, Gontrand Leyssens, Olivier Allgaier, Cornelius Schönnenbeck, Valérie Tschamber, Jean-François Brilhac, Toni Tahtouh, Olivier Guézet and Sylvain Allano

Applied Energy, 2017, vol. 189, issue C, 578-587

Abstract: Fossil fuel scarcity, global warming and non-constant energy production through renewable energies (wind turbines and photovoltaic cells for example), lead to investigate innovative energy sources and new ways for energy storage. In the present study, magnesium powder has been considered as a new possible energy carrier. In order to analyze more deeply the magnesium combustion and the generated by-products, short time stable magnesium/air flames have been realized in a combustion chamber using an oxy-acetylene flame for ignition. Sieved magnesium samples with two fractions were combusted: 20–50μm and 50–70μm. The power delivered by the Mg/air flame was estimated in the range 3–5kW. The gaseous emissions (O2, CO2 from oxy-acetylene combustion, NO and NO2) were analyzed with on-line analyzers and the particulate emissions were analyzed with an Electrical Low Pressure Impactor (ELPI). The mass concentration of emitted particles whose size is smaller than 10μm was proved to be very high (up to 35g/(N)m3) and the emitted particles were mainly bigger than 1μm (84–97wt%). NOx emissions were higher for the 20–50μmMg fraction (NO average of 4300±200mg/(N)m3) than for the 50–70μmMg fraction (NO average of 1100±140mg/(N)m3).

Keywords: Magnesium combustion; Energy storage; Particulate Matter (PM); Electrical Low Pressure Impactor (ELPI); Nitrogen Oxides (NOX) (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:189:y:2017:i:c:p:578-587

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DOI: 10.1016/j.apenergy.2016.12.069

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