Experimental investigation of ammonia–hydrogen interaction in a jet–stirred reactor

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<p>Ammonia is a promising carbon-neutral renewable energy source and can blend with hydrogen to increase its reactivity. Ammonia is also a fuel-nitrogen source and it is significant to suppress its fuel-NOx production. This study presents new experimental results on ammonia-hydrogen oxidation in a jet-stirred reactor. The effects of reaction temperature (T: 800 – 1400 K), equivalence ratio (Φ: 0.5 – 2.5) are experimentally investigated. The onset temperature of NH3 oxidation is 900 K when mixed with equivalent H2, which is 225 K earlier than that of pure NH3. For NH3/H2 mixture, the NO begins to generate at approximately 1150 K, at which NH3 is almost completely consumed. When T = 1200 K and 1400 K, the decrease of Φ promotes ammonia consumption and NO emission, and Φ =1.1 and 1.3 are recommended respectively to minimize NO and NH3 emissions. The addition of H2 contributes to the oxidation of NH3, especially in fuel-rich conditions.</p>

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