Oxidation of methylamine (CH3NH2)/CH4/NO mixtures in an atmospheric-pressure flow reactor

IF 5.3 2区工程技术 Q2 ENERGY & FUELS Proceedings of the Combustion Institute Pub Date : 2024-01-01 DOI:10.1016/j.proci.2024.105456

María U. Alzueta , Teresa Pérez , Lorena Marrodán

{"title":"Oxidation of methylamine (CH3NH2)/CH4/NO mixtures in an atmospheric-pressure flow reactor","authors":"María U. Alzueta , Teresa Pérez , Lorena Marrodán","doi":"10.1016/j.proci.2024.105456","DOIUrl":null,"url":null,"abstract":"<div>The oxidation of methylamine (CH3NH2) and methane mixtures has been studied by experiments in a flow reactor at atmospheric pressure and temperatures of 350–1450 K. In addition to temperature, stoichiometry (ranging from fuel-rich to fuel-lean conditions) and the presence of NO have been evaluated. Several diagnostic techniques have been used to experimentally quantify many different species: gas chromatography, Fourier Transform Infra-red spectroscopy (FTIR) and an infra-red NO analyzer. Results show a negligible influence of stoichiometry both on the conversion of MEA and CH4 in the absence of NO, while the presence of NO acts to inhibit the conversion of CH4 with no appreciable influence on MEA conversion. This indicates the complex interaction occurring in the MEA/CH4/NO mixtures, for which the mechanism is not able to properly predict the conversion of CH4 in the presence of NO, while the rest of compounds are well reproduced both in the absence and presence of NO. This fact, together with the probable formation of species containing C and N, due to the presence of additional unidentified species and the deep analysis of the mass balances carried out, supports the idea of the formation of C-N species, not clearly identified so far. The literature mechanism used in simulations has provided good results in reproducing most of the species and conditions considered. The largest discrepancy has been observed for CH4 conversion in the presence of NO, supporting the existence of missing interactions in the mechanism.</div>","PeriodicalId":408,"journal":{"name":"Proceedings of the Combustion Institute","volume":"40 1","pages":"Article 105456"},"PeriodicalIF":5.3000,"publicationDate":"2024-01-01","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://www.sciencedirect.com/science/article/pii/S1540748924002645","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

Abstract

The oxidation of methylamine (CH₃NH₂) and methane mixtures has been studied by experiments in a flow reactor at atmospheric pressure and temperatures of 350–1450 K. In addition to temperature, stoichiometry (ranging from fuel-rich to fuel-lean conditions) and the presence of NO have been evaluated. Several diagnostic techniques have been used to experimentally quantify many different species: gas chromatography, Fourier Transform Infra-red spectroscopy (FTIR) and an infra-red NO analyzer. Results show a negligible influence of stoichiometry both on the conversion of MEA and CH₄ in the absence of NO, while the presence of NO acts to inhibit the conversion of CH₄ with no appreciable influence on MEA conversion. This indicates the complex interaction occurring in the MEA/CH₄/NO mixtures, for which the mechanism is not able to properly predict the conversion of CH₄ in the presence of NO, while the rest of compounds are well reproduced both in the absence and presence of NO. This fact, together with the probable formation of species containing C and N, due to the presence of additional unidentified species and the deep analysis of the mass balances carried out, supports the idea of the formation of C-N species, not clearly identified so far. The literature mechanism used in simulations has provided good results in reproducing most of the species and conditions considered. The largest discrepancy has been observed for CH₄ conversion in the presence of NO, supporting the existence of missing interactions in the mechanism.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

在常压流动反应器中氧化甲胺（CH3NH2）/CH4/NO 混合物

通过在常压和 350-1450 K 温度条件下的流动反应器中进行实验，研究了甲胺（CH3NH2）和甲烷混合物的氧化过程。使用了几种诊断技术对许多不同的物种进行实验量化：气相色谱法、傅立叶变换红外光谱法（FTIR）和红外氮氧化物分析仪。结果表明，在没有 NO 的情况下，化学计量对 MEA 和 CH4 转化的影响微乎其微，而 NO 的存在会抑制 CH4 的转化，但对 MEA 的转化没有明显影响。这表明在 MEA/CH4/NO 混合物中发生了复杂的相互作用，其机理无法正确预测在有 NO 存在的情况下 CH4 的转化率，而其余化合物在没有 NO 和有 NO 存在的情况下都能很好地再现。这一事实，加上由于存在其他未确定的物种而可能形成的含有 C 和 N 的物种，以及对质量平衡进行的深入分析，支持了形成迄今尚未明确确定的 C-N 物种的观点。模拟中使用的文献机制在再现大多数物种和条件方面取得了良好的结果。在有 NO 存在的情况下，CH4 转化的差异最大，这证明了该机制中存在缺失的相互作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Proceedings of the Combustion Institute 工程技术-工程：化工

CiteScore

7.00

自引率

0.00%

发文量

420

审稿时长

3.0 months

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. Research papers and invited topical reviews; Reaction Kinetics; Soot, PAH, and other large molecules; Diagnostics; Laminar Flames; Turbulent Flames; Heterogeneous Combustion; Spray and Droplet Combustion; Detonations, Explosions & Supersonic Combustion; Fire Research; Stationary Combustion Systems; IC Engine and Gas Turbine Combustion; New Technology Concepts The electronic version of Proceedings of the Combustion Institute contains supplemental material such as reaction mechanisms, illustrating movies, and other data.