Experimental study and mechanism analysis of the NOx emissions in the NH3 MILD combustion by a novel burner
Experimental study and mechanism analysis of the NOx emissions in the NH3 MILD combustion by a novel burner
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DOI：
10.1016/j.fuel.2021.122417
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发表时间：
2021-11
期刊：
影响因子：
7.4
通讯作者：
Haiyang Shi;Shibo Liu;C. Zou;Lingfeng Dai;Jiarui Li;Wenxiang Xia;Jinling Yang;Jianghui Luo;Wenyu Li
中科院分区：
文献类型：
--
作者：
Haiyang Shi;Shibo Liu;C. Zou;Lingfeng Dai;Jiarui Li;Wenxiang Xia;Jinling Yang;Jianghui Luo;Wenyu Li
NH3can be used as an H2energy carrier or an alternative carbon-free fuel because of its high volumetric energy density and easy liquefaction, which leads to convenient and economic transportation and storage within the global energy network. However, the combustion of NH3is associated with some practical challenges, such as weak reactivity and high NOxemission. In this study, Moderate & Intense Low Oxygen Dilution (MILD) combustion of NH3was conducted experimentally in a novel burner. The heated and diluted air was produced by burning a premixed lean CH4mixture using a metal fiber burner installed at the bottom of the combustion chamber and NH3was injected into the furnace by 20 nozzles oppositely installed on the sidewalls of the combustion chamber at 40 mm above its bottom. A total of 20 cases were investigated in the present work, including premixed combustion of CH4and CH4/NH3, and MILD combustion of NH3,under various conditions. The Chemical reactor network (CRN) in the ANSYS Chemkin 17.0 and the HUST mechanism were used to simulate and analyze the NO formation mechanism under several experimental conditions. The experimental results showed that the NH3MILD combustion significantly reduces the NOxemissions. The NOxreduction kinetics and the impact of NH3flow rate and the equivalence ratio on NO emission in NH3MILD combustion were analyzed in detail.
