Investigation of soot suppression by ammonia addition to laminar ethylene flames at varying pressure

被引:17
作者
Cepeda, Francisco [1 ]
Dworkin, Seth B. [1 ]
Karatas, Ahmet E. [2 ]
机构
[1] Toronto Metropolitan Univ, Dept Mech & Ind Engn, 350 Victoria St, Toronto, ON M5B 2K3, Canada
[2] Toronto Metropolitan Univ, Dept Aerosp Engn, 350 Victoria St, Toronto, ON M5B 2K3, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Ammonia; Ethylene; Soot; Laminar flames; High-pressure; Spectral soot emissions; DIFFUSION FLAMES; PREMIXED FLAMES; TEMPERATURE; ENRICHMENT; HYDROGEN; INDEX;
D O I
10.1016/j.combustflame.2023.112728
中图分类号
O414.1 [热力学];
学科分类号
摘要
Blending ammonia with hydrocarbon fuels is a promising pathway to expedite its use in different indus-tries, as it might offer a good compromise between energy output and minimizing the emissions of both NOx and carbonaceous combustion products, including soot. This work describes the effects of pressure on soot formation in ethylene/ammonia laminar co-flow diffusion flames. A high-pressure chamber was used to study the flames at pressures between 1 to 7 atm, and ammonia addition mole fractions between 0 and 50% (38% in mass fraction). Soot volume fraction and soot temperature measurements using a Spec-tral Soot Emissions technique show that adding a 50% mole fraction of ammonia at atmospheric pressure reduces soot concentration below the detection limit of the technique and between 70% and 80% for all the remaining studied pressures; that is, the ammonia soot suppression characteristics are demonstrated when increasing pressure. Maximum soot yield and total volumetrically integrated soot volume fraction results are investigated to reveal the contrasting effects of pressure and ammonia addition on the flame structure and the soot formation mechanisms. The results showcase the potential of NH3 in high-pressure applications when mixed with hydrocarbon fuels to reduce carbon emissions.(c) 2023 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
引用
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页数:8
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