{"title":"H2O 稀释对 NH3/H2 燃料混合物氧化产生的氮氧化物排放的影响","authors":"Guodong Shi, Pengfei Li, Zhaohui Liu, Bassam Dally","doi":"10.1016/j.proci.2024.105407","DOIUrl":null,"url":null,"abstract":"During NH/H combustion, reactant jets entrain the burnt gas, resulting in a combustion zone diluted with HO. Therefore, the effect of HO dilution on NO formation should be carefully examined. In this study, NH/H oxidation with N and HO dilutions was investigated in a jet-stirred reactor (JSR). A systematic experimental analysis was conducted to investigate the effects of different factors, including temperature (), equivalence ratio (Φ), and HO volume fraction (). A numerical simulation was conducted using a modified mechanism to interpret the measured results and examine the kinetic pathways. NO formation is enhanced as increases but inhibited as Φ increases The effect of HO dilution on NO formation is related to and Φ. Under fuel-lean conditions, NO generation is hindered by HO dilution. NO formation is reduced by 43 % at = 1375 K and Φ = 0.5. In contrast, under fuel-rich conditions (Φ > 1), HO dilution promotes NO formation at high temperatures (e.g., > 1300 K at Φ = 2.5) The NO concentration peaks at approximately 1250 K in cases of N dilution, and 25 % HO dilution increases the of the peak NO concentration by approximately 100 K. At 1375 K, the promoting effect of HO on NO generation is significant at = 10 %. This study provides new insights into the effect of HO dilution on NO formation characteristics during NH/H oxidation.","PeriodicalId":408,"journal":{"name":"Proceedings of the Combustion Institute","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of H2O dilution on NOx emissions from the oxidation of NH3/H2 fuel mixture\",\"authors\":\"Guodong Shi, Pengfei Li, Zhaohui Liu, Bassam Dally\",\"doi\":\"10.1016/j.proci.2024.105407\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"During NH/H combustion, reactant jets entrain the burnt gas, resulting in a combustion zone diluted with HO. Therefore, the effect of HO dilution on NO formation should be carefully examined. In this study, NH/H oxidation with N and HO dilutions was investigated in a jet-stirred reactor (JSR). A systematic experimental analysis was conducted to investigate the effects of different factors, including temperature (), equivalence ratio (Φ), and HO volume fraction (). A numerical simulation was conducted using a modified mechanism to interpret the measured results and examine the kinetic pathways. NO formation is enhanced as increases but inhibited as Φ increases The effect of HO dilution on NO formation is related to and Φ. Under fuel-lean conditions, NO generation is hindered by HO dilution. NO formation is reduced by 43 % at = 1375 K and Φ = 0.5. In contrast, under fuel-rich conditions (Φ > 1), HO dilution promotes NO formation at high temperatures (e.g., > 1300 K at Φ = 2.5) The NO concentration peaks at approximately 1250 K in cases of N dilution, and 25 % HO dilution increases the of the peak NO concentration by approximately 100 K. At 1375 K, the promoting effect of HO on NO generation is significant at = 10 %. This study provides new insights into the effect of HO dilution on NO formation characteristics during NH/H oxidation.\",\"PeriodicalId\":408,\"journal\":{\"name\":\"Proceedings of the Combustion Institute\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the Combustion Institute\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1016/j.proci.2024.105407\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Combustion Institute","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.proci.2024.105407","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
摘要
在 NH/H 燃烧过程中,反应物喷流会夹带燃烧气体,导致燃烧区被 HO 稀释。因此,应仔细研究 HO 稀释对 NO 形成的影响。本研究在喷射搅拌反应器(JSR)中研究了 NH/H 氧化与 N 和 HO 稀释的关系。通过系统的实验分析,研究了温度()、当量比(Φ)和 HO 体积分数()等不同因素的影响。为了解释测量结果和研究动力学路径,使用修改过的机理进行了数值模拟。HO 稀释对 NO 生成的影响与 Φ 有关。在缺乏燃料的条件下,HO 稀释会阻碍 NO 的生成。在 = 1375 K 和 Φ = 0.5 时,NO 的形成减少了 43%。与此相反,在燃料丰富的条件下(Φ > 1),HO 稀释在高温下(例如,Φ = 2.5 时 > 1300 K)促进了 NO 的生成。在 N 稀释的情况下,NO 浓度在大约 1250 K 时达到峰值,25 % 的 HO 稀释使 NO 浓度峰值提高了大约 100 K。这项研究为了解 HO 稀释对 NH/H 氧化过程中 NO 生成特性的影响提供了新的视角。
Effect of H2O dilution on NOx emissions from the oxidation of NH3/H2 fuel mixture
During NH/H combustion, reactant jets entrain the burnt gas, resulting in a combustion zone diluted with HO. Therefore, the effect of HO dilution on NO formation should be carefully examined. In this study, NH/H oxidation with N and HO dilutions was investigated in a jet-stirred reactor (JSR). A systematic experimental analysis was conducted to investigate the effects of different factors, including temperature (), equivalence ratio (Φ), and HO volume fraction (). A numerical simulation was conducted using a modified mechanism to interpret the measured results and examine the kinetic pathways. NO formation is enhanced as increases but inhibited as Φ increases The effect of HO dilution on NO formation is related to and Φ. Under fuel-lean conditions, NO generation is hindered by HO dilution. NO formation is reduced by 43 % at = 1375 K and Φ = 0.5. In contrast, under fuel-rich conditions (Φ > 1), HO dilution promotes NO formation at high temperatures (e.g., > 1300 K at Φ = 2.5) The NO concentration peaks at approximately 1250 K in cases of N dilution, and 25 % HO dilution increases the of the peak NO concentration by approximately 100 K. At 1375 K, the promoting effect of HO on NO generation is significant at = 10 %. This study provides new insights into the effect of HO dilution on NO formation characteristics during NH/H oxidation.
期刊介绍:
The Proceedings of the Combustion Institute contains forefront contributions in fundamentals and applications of combustion science. For more than 50 years, the Combustion Institute has served as the peak international society for dissemination of scientific and technical research in the combustion field. In addition to author submissions, the Proceedings of the Combustion Institute includes the Institute''s prestigious invited strategic and topical reviews that represent indispensable resources for emergent research in the field. All papers are subjected to rigorous peer review.
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