Title Flame characteristics in plasma–assisted combustion of H2 enriched NH3/CH4 blends /
Authors Ambrazevicius, Ignas ; Paulauskas, Rolandas
ISBN 9786256443273
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Is Part of Proceedings of 17th International Combustion Symposium (INCOS) 2024, 19-21 September 2024.. Bursa, 2024. p. 314-321.. ISBN 9786256443273
Keywords [eng] hydrogen ; ammonia ; plasma-assisted combustion ; renewable gases ; flame stability ; combustion efficiency ; infrared radiation ; heat flux
Abstract [eng] The European gas market is transitioning from natural gas to renewable gases to enhance climate safety and energy security. Hydrogen and ammonia are central to this transition, offering sustainable alternatives to methane. Hydrogen, a zero-emission fuel, can be produced via electrolysis using renewable energy or from natural gas with carbon capture. Ammonia, synthesized from hydrogen and nitrogen, serves as an energy carrier and storage medium. This research investigates the combustion characteristics and efficiency of hydrogen–enriched NH3/CH4 blends using non-thermal plasma assistance. The experiments were conducted using a fully premixed gas burner with a thermal power of 1,33 kW. Non–thermal plasma was produced with high voltage and high frequency generator at 120 kHz and 8,33 kV. Time–resolved chemiluminescence data for OH* and NH2* were collected using an ICCD camera with corresponding filters, alongside measurements from MIR emission spectroscopy and a thermal irradiance flux meter. Experimental results showed that non– thermal plasma increased flame stability and enhanced infrared radiation. The highest adiabatic flame temperature was observed with an 80% methane and 20% hydrogen mixture, reaching 1442 °C without plasma and 11459 °C with plasma. Infrared radiation intensity increased by 13% for ammonia-hydrogen mixtures under plasma assistance. Heat flux measurements indicated a significant 15% increase for the 70% ammonia and 20% hydrogen blend. These findings suggest plasma–assisted combustion can enhance the efficiency and stability of low–carbon fuel mixtures, promoting their integration into existing infrastructures while reducing greenhouse gas emissions.
Published Bursa, 2024
Type Conference paper
Language English
Publication date 2024