Applications in Energy and Combustion Science最新文献

Theoretical study on the co-adsorption effect of H atoms on NH3 decomposition over Pt(100) and Pt(111) surfaces H原子对Pt（100）和Pt（111）表面NH3分解共吸附效应的理论研究

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Applications in Energy and Combustion Science Pub Date : 2025-07-25 DOI: 10.1016/j.jaecs.2025.100358

Huanhuan Wang , Long Qin , Fanggang Zhang , Zaiqing Que , Ran Sui

{"title":"Theoretical study on the co-adsorption effect of H atoms on NH3 decomposition over Pt(100) and Pt(111) surfaces","authors":"Huanhuan Wang , Long Qin , Fanggang Zhang , Zaiqing Que , Ran Sui","doi":"10.1016/j.jaecs.2025.100358","DOIUrl":"10.1016/j.jaecs.2025.100358","url":null,"abstract":"<div><div>The influence of co-adsorbed hydrogen (H) atoms on the decomposition of ammonia (NH<sub>3</sub>) over two representative crystalline facets of platinum catalyst, i.e., Pt(100) and Pt(111), is investigated using density functional theory (DFT) and microkinetic modeling. The results reveal that NH₃ preferentially adsorbs on top sites, with its binding strength decreasing at higher coverages due to intermolecular repulsion. Although NH<sub>3</sub> adsorption is progressively unfavored on both facets with increased coverage by co-adsorbed H atoms, facet-dependent effects are observed: while Pt(100) maintains stable NH<sub>3</sub> decomposition energetics even at high H coverages, Pt(111) shows significant inhibition effect with increased reaction barriers and destabilized intermediates. Microkinetic simulations further confirm that Pt(100) exhibits superior catalytic activity, particularly in N–N coupling and N<sub>2</sub> desorption, compared to Pt(111). These findings highlight the critical role of surface structure and hydrogen coverage in modulating NH<sub>3</sub> decomposition kinetics, providing insights for optimizing Pt-based catalysts in NH<sub>3</sub>-based energy systems.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100358"},"PeriodicalIF":5.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acetylene formation via oxidative coupling of methane over monolithic Pt/Al2O3 and Pt/ZrO2 catalysts 单片Pt/Al2O3和Pt/ZrO2催化剂上甲烷氧化偶联生成乙炔

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Applications in Energy and Combustion Science Pub Date : 2025-07-23 DOI: 10.1016/j.jaecs.2025.100357

Sven Schardt , Ahmet Çelik , Simon Bastian , Suchada Sirisomboonchai , Maki Nakamura , Koyo Norinaga , Patrick Lott

{"title":"Acetylene formation via oxidative coupling of methane over monolithic Pt/Al2O3 and Pt/ZrO2 catalysts","authors":"Sven Schardt , Ahmet Çelik , Simon Bastian , Suchada Sirisomboonchai , Maki Nakamura , Koyo Norinaga , Patrick Lott","doi":"10.1016/j.jaecs.2025.100357","DOIUrl":"10.1016/j.jaecs.2025.100357","url":null,"abstract":"<div><div>This study investigates the influence of key operational parameters – including space velocity, feed gas dilution with nitrogen, and the carbon-to-oxygen (C:O) ratio – on monolithic Pt/Al₂O₃ and Pt/ZrO₂ catalysts for the oxidative coupling of methane (OCM). Optimal operating conditions were identified that yielded high C₂ selectivities, with a notably large share of acetylene. Under ideal conditions, a Pt/ZrO₂ catalyst achieved a maximum C₂ selectivity of 11.3 %, with 84 % acetylene contribution and approximately 90 % methane conversion. Zirconia was found to be a superior support material compared to alumina in terms of catalyst stability and longevity. A number of characterization techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) were applied and revealed significant morphological and structural changes in both catalyst types, induced by the harsh reaction conditions with temperatures exceeding 1200 °C. These findings contribute to the advancement of more robust catalyst formulations and optimized process conditions for the OCM reaction.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100357"},"PeriodicalIF":5.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of multi-component evaporation on turbulent spray combustion investigated by Direct Numerical Simulation 直接数值模拟研究了多组分蒸发对湍流喷雾燃烧的影响

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Applications in Energy and Combustion Science Pub Date : 2025-07-23 DOI: 10.1016/j.jaecs.2025.100355

Abouelmagd Abdelsamie , Dominique Thévenin

{"title":"Impact of multi-component evaporation on turbulent spray combustion investigated by Direct Numerical Simulation","authors":"Abouelmagd Abdelsamie , Dominique Thévenin","doi":"10.1016/j.jaecs.2025.100355","DOIUrl":"10.1016/j.jaecs.2025.100355","url":null,"abstract":"<div><div>Spray flame synthesis (SFS) is a widely used technique for producing nanoparticles. To optimize corresponding applications, an accurate prediction of flame behavior and precursor distribution is crucial. This study investigates the influence of evaporation on spray flame dynamics by comparing single-component and multi-component evaporation models in direct numerical simulations (DNS) of ethanol sprays containing titanium isopropoxide (TTIP) as precursor under reactive conditions. Simulations are conducted using different TTIP concentrations to assess the sensitivity of evaporation rates, droplet lifetimes, flame structure, and precursor distribution. Results reveal that the multi-component evaporation model leads to slower droplet evaporation, larger droplet diameters, and a thinner flame located closer to the central axis of the jet compared to the simplified, single-component model. In contrast, the single-component model overestimates the evaporation rate (based solely on ethanol properties), resulting in broader flame zones. Scatter plots and time-averaged fields show significant discrepancies in the gas-phase concentrations of ethanol and TTIP between the two models. These differences have important implications for nanoparticle synthesis, where precursor distribution affects particle growth and morphology. These findings emphasize the importance of multi-component evaporation models for accurate simulations of spray flames involving complex liquid mixtures.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100355"},"PeriodicalIF":5.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Clustering model for Partially Stirred Reactor closures: Application to Cabra jet flames 部分搅拌反应器闭包的聚类模型：在Cabra喷射火焰中的应用

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Applications in Energy and Combustion Science Pub Date : 2025-07-19 DOI: 10.1016/j.jaecs.2025.100352

Min Zhang , Han Li , Salvatore Iavarone , Arthur Péquin , Alessandro Parente , Robert S. Barlow , Zhi X. Chen

{"title":"Clustering model for Partially Stirred Reactor closures: Application to Cabra jet flames","authors":"Min Zhang , Han Li , Salvatore Iavarone , Arthur Péquin , Alessandro Parente , Robert S. Barlow , Zhi X. Chen","doi":"10.1016/j.jaecs.2025.100352","DOIUrl":"10.1016/j.jaecs.2025.100352","url":null,"abstract":"<div><div>In the field of turbulent reacting flows, combustion phenomena, such as the mixing of cold fuel with hot products, propagation of flames, and auto-ignition, are profoundly affected by interactions between turbulence and chemistry, known as turbulence-chemistry interactions (TCI). Accurately modeling these intricate combustion processes requires a closure adept at capturing TCI behavior. Among the existing combustion models, the Partially Stirred Reactor (PaSR) model, as one of the finite-rate chemistry models, has shown significant suitability for modeling TCI within various combustion regimes. The modeling of chemical and mixing time scales is crucial to the performance of the PaSR model. Although numerous studies have extensively explored these aspects in separate efforts, there is a notable lack of a systematic study on employing the PaSR model to turbulent flames with multiple combustion regimes. In the present study, the Cabra flame, a vitiated coflow flame with multiple combustion regimes, is investigated by using large eddy simulations (LES) coupled with the PaSR model. Particular emphasis is placed on evaluating the combinations of the chemical and mixing time scales. Twelve combinations, involving three distinct chemical time scales and four different mixing time scales, are evaluated. The results reveal that both the chemical and mixing time scales significantly influence the model’s predictive accuracy, and various combinations exhibit varied predictive strengths in flame transition and diffusion regions. Based on the findings from these twelve combinations, a clustering model for Partially Stirred Reactor closure is first proposed. The model performance is then assessed, showing a better prediction in mean and root mean square values of temperature and species concentrations, as well as probability density functions of the reaction fraction, as compared to the traditional PaSR models.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100352"},"PeriodicalIF":5.0,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detecting and characterizing thermoacoustic oscillations in an industrial combustor with the spectral proper orthogonal decomposition 用光谱固有正交分解法检测和表征工业燃烧室热声振荡

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Applications in Energy and Combustion Science Pub Date : 2025-07-11 DOI: 10.1016/j.jaecs.2025.100344

H. Gambassi , N. Sekularac , P. Ziade , M.A. Mohamad , X. Fang

{"title":"Detecting and characterizing thermoacoustic oscillations in an industrial combustor with the spectral proper orthogonal decomposition","authors":"H. Gambassi , N. Sekularac , P. Ziade , M.A. Mohamad , X. Fang","doi":"10.1016/j.jaecs.2025.100344","DOIUrl":"10.1016/j.jaecs.2025.100344","url":null,"abstract":"<div><div>This study demonstrates how thermoacoustic oscillations occurring at multiple frequencies in a combustor with mechanical vibrations can be detected and characterized using high-speed chemiluminescence imaging and the time-domain Spectral Proper Orthogonal Decomposition (SPOD). Three turbulent premixed methane-air flames with different morphologies are presented: an M-flame, a Bunsen flame, and a third case featuring a bistable flame that intermittently transitions between these two flame shapes. The analysis of these cases demonstrates how the SPOD can be used to (1) separate the influence of mechanical vibrations on chemiluminescence measurements from other frequency-centered phenomena, (2) characterize heat release rate oscillations in space and time with modes that describe periodic phenomena with both wide- and narrow-band spectral signatures, and (3) reveal deterministic dynamics with a low signal-to-noise ratio that were not easily detectable in the power spectral densities of either the spatially averaged <span><math><msup><mrow><mi>OH</mi></mrow><mrow><mo>∗</mo></mrow></msup></math></span> chemiluminescence intensity or the pressure signal recorded upstream of the flame. In addition, this article also discusses how the SPOD enabled the identification of a correlation between the decay of a thermoacoustic mode and the state of a bistable flame.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100344"},"PeriodicalIF":5.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A numerical study of hydrogen enrichment effects on laminar methane/air flame propagation and emissions in crevices 富氢对裂缝中层流甲烷/空气火焰传播和发射影响的数值研究

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Applications in Energy and Combustion Science Pub Date : 2025-07-08 DOI: 10.1016/j.jaecs.2025.100351

Vili-Petteri Salomaa , Parsa Tamadonfar , Mahmoud Gadalla , Ville Vuorinen , Ossi Kaario

{"title":"A numerical study of hydrogen enrichment effects on laminar methane/air flame propagation and emissions in crevices","authors":"Vili-Petteri Salomaa , Parsa Tamadonfar , Mahmoud Gadalla , Ville Vuorinen , Ossi Kaario","doi":"10.1016/j.jaecs.2025.100351","DOIUrl":"10.1016/j.jaecs.2025.100351","url":null,"abstract":"<div><div>Crevices, i.e. narrow channels, inside combustion devices, have been found to be a major source of emissions, such as unburned hydrocarbons (uHC) and carbon monoxide (CO). In the present 2D model problem, a premixed laminar methane/air flame approaches a narrow enclosure with cold walls. The effects of the crevice height, the hydrogen enrichment, and the equivalence ratio on the flame propagation and formation of pollutants are investigated with direct numerical simulations. For the chosen geometry, the flame experiences a head-on quenching (HOQ), possibly followed by a side-wall quenching (SWQ) and second HOQ, depending on the chosen conditions. The present study concludes that, (I) the quenching Peclet number is a sufficient a priori tool for estimating the methane/hydrogen flame propagation into a crevice, (II) increasing the crevice height, H<sub>2</sub>-enrichment level, and equivalence ratio (up to stoichiometry) improve the flame penetration into a crevice, (III) a reciprocal relationship is observed between the flame penetration distance and the uHC emissions left in the system after combustion, and (IV) both the CO and NO emissions have the same dominant production and consumption reactions, respectively, regardless of the quenching scenario (HOQ or SWQ).</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100351"},"PeriodicalIF":5.0,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A coupled Eulerian–Lagrangian approach with explicit volume diffusion subgrid closures for jet breakup and atomisation 射流破裂和雾化的欧拉-拉格朗日耦合方法及显式体积扩散子网格闭包

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Applications in Energy and Combustion Science Pub Date : 2025-07-07 DOI: 10.1016/j.jaecs.2025.100350

Jiayue Yu , Sebastian Galindo-Lopez , Matthew J. Cleary

{"title":"A coupled Eulerian–Lagrangian approach with explicit volume diffusion subgrid closures for jet breakup and atomisation","authors":"Jiayue Yu , Sebastian Galindo-Lopez , Matthew J. Cleary","doi":"10.1016/j.jaecs.2025.100350","DOIUrl":"10.1016/j.jaecs.2025.100350","url":null,"abstract":"<div><div>A novel, coupled Eulerian–Lagrangian Large Eddy Simulation method is developed to model turbulent jet breakup, atomisation and droplet dispersion applicable to combusting sprays and other two-phase flows. The approach integrates an Eulerian single-fluid representation incorporating Explicit Volume Diffusion (EVD) subgrid closures for the continuous fluids, including the liquid core and interfacial region, which transitions to a two-fluid representation involving Lagrangian Particle Tracking (LPT) of inertial droplets. The Eulerian–Lagrangian transition utilises criteria based on liquid volume fraction thresholds and a critical droplet Weber number. The coupled model (EVD-LPT) is validated against new high-resolution Direct Numerical Simulation (DNS) data of a turbulent round liquid jet and existing experimental and numerical data for a turbulent jet in crossflow. Results demonstrate substantial improvements in droplet size prediction relative to Eulerian-only EVD simulations. In the round jet case, mesh convergence is achieved for droplets larger than <span><math><mrow><mn>5</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>, with low sensitivity to transition parameters. The crossflow simulations also agree closely with DNS and previous Large Eddy Simulation (LES) results, particularly in capturing inertial droplet behaviour. The study reveals that the Lagrangian representation significantly enhances the prediction of droplet size distributions, addressing known limitations of Eulerian-only models in regions dominated by aerodynamic inertial effects. Overall, the coupled EVD-LPT method provides a computationally efficient, accurate approach for atomisation predictions in complex spray systems, laying a foundation for future developments incorporating droplet secondary breakup, non-spherical droplet shapes, and droplet interaction models.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100350"},"PeriodicalIF":5.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large eddy simulation of spray combustion in a lean direct injection combustor using a novel subgrid-scale stress model 基于新型亚网格尺度应力模型的精益直喷燃烧室喷雾燃烧大涡模拟

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Applications in Energy and Combustion Science Pub Date : 2025-07-05 DOI: 10.1016/j.jaecs.2025.100347

Yicun Wang , Kun Luo , Hualin Xiao , Tai Jin , Changxiao Shao , Jianren Fan

{"title":"Large eddy simulation of spray combustion in a lean direct injection combustor using a novel subgrid-scale stress model","authors":"Yicun Wang , Kun Luo , Hualin Xiao , Tai Jin , Changxiao Shao , Jianren Fan","doi":"10.1016/j.jaecs.2025.100347","DOIUrl":"10.1016/j.jaecs.2025.100347","url":null,"abstract":"<div><div>Large eddy simulation (LES) is an important tool for studying turbulent spray combustion and developing next-generation combustion devices. In LES, the subgrid-scale (SGS) stress needs to be modeled with the closure models. Among various SGS stress models, the recently developed flame surface and k-equation-based gradient model (FKGM) has shown sound performance in predicting the SGS stress because it can consider the effect of combustion on turbulence, which is rarely considered in previous studies of SGS modeling. In this study, the LES of spray combustion in the NASA lean direct injection combustor is conducted to further validate the FKGM model and analyze the complex spray flame structure. The FKGM model achieves good agreement with the experimental measurements in terms of gas mean and fluctuating velocities, which indicates the model’s accuracy. Radial profiles of temperature, major combustion products as well as droplet diameters are also well reproduced in the current simulation. The inner recirculation zone, small outer recirculation zones, and three main flame zones are well captured. The flame index is introduced to identify different combustion regimes in the complex spray flame where both premixed and diffusion regimes coexist. Quantitative statistics related to the heat release rate show that the heat release intensity of the premixed flame regime is higher than that of the diffusion regime. Overall, the good agreement with the experimental measurements demonstrates the predictive capability of the FKGM model for SGS stress modeling in turbulent spray combustion.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100347"},"PeriodicalIF":5.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rare earth orthovanadates RVO4 (LaVO4, CeVO4) bifunctional catalyst for the synthesis of fatty acid methyl esters from Sapindus trifoliatus non-edible oil 稀土正钒酸盐RVO4 （LaVO4, CeVO4）双功能催化剂在三叶子非食油合成脂肪酸甲酯中的应用

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Applications in Energy and Combustion Science Pub Date : 2025-06-25 DOI: 10.1016/j.jaecs.2025.100348

Sadaf Khoso , Iftikhar Ahmad , Rajwali Khan , Syed Danish Ali , Mushtaq Ahmad , Amir Waseem

{"title":"Rare earth orthovanadates RVO4 (LaVO4, CeVO4) bifunctional catalyst for the synthesis of fatty acid methyl esters from Sapindus trifoliatus non-edible oil","authors":"Sadaf Khoso , Iftikhar Ahmad , Rajwali Khan , Syed Danish Ali , Mushtaq Ahmad , Amir Waseem","doi":"10.1016/j.jaecs.2025.100348","DOIUrl":"10.1016/j.jaecs.2025.100348","url":null,"abstract":"<div><div>Investigation and enhancement of FAME synthesis from non-edible oil is one of the contemporary means to solve the inadequate amount of conventional raw materials and their high prices. This study aims to synthesize and assess the efficiency of different heterogeneous bifunctional catalysts; CeVO<sub>4</sub> and LaVO<sub>4</sub>, to produce FAME from Sapindus trifoliatus seed oil (SPO), as a non-edible feedstock. The outcomes showed that the CeVO<sub>4</sub> and LaVO<sub>4</sub> catalysts revealed exceptional catalytic performance for simultaneous esterification and transesterification of SPO with a higher percentage yield. The optimum conditions were determined by varying experimental parameters such as catalyst loading, temperature, reaction duration, and the methanol-to-oil molar ratio. The CeVO<sub>4</sub> catalyst produced the highest 98 % SPO conversion to FAME when 8 % weight of the catalyst was used with the reaction time of 100 min, temperature of 60 °C, and the methanol-to-oil ratio of 25:1. The LaVO<sub>4</sub> catalyst produced a 94 % yield when the reaction temperature was 60 °C, the catalyst amount was 8 %, the methanol-to-oil ratio was 25:1 mol, and the reaction time was 110 min. The SPO FAME properties conform to the ASTM6751 standard specification. Besides, the stability and reusability of these heterogenous catalysts were assessed, and it was discovered that the catalysts exhibited good stability, giving the highest biodiesel conversion even after three cycles.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100348"},"PeriodicalIF":5.0,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-time analysis of flame chemiluminescence spectra for equivalence ratio and gas composition using neural network approaches 利用神经网络方法实时分析等效比和气体成分的火焰化学发光光谱

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Applications in Energy and Combustion Science Pub Date : 2025-06-21 DOI: 10.1016/j.jaecs.2025.100345

André Müller, Veysel Ersoy, Jan Menser, Torsten Endres, Christof Schulz

{"title":"Real-time analysis of flame chemiluminescence spectra for equivalence ratio and gas composition using neural network approaches","authors":"André Müller, Veysel Ersoy, Jan Menser, Torsten Endres, Christof Schulz","doi":"10.1016/j.jaecs.2025.100345","DOIUrl":"10.1016/j.jaecs.2025.100345","url":null,"abstract":"<div><div>In response to the expected challenges in gas network operations, where variable gas compositions require robust combustion systems with automatic adaptation, this study explores the application of an artificial neural network (ANN) for real-time recognition of flame feed gas compositions based on spatially integrated flame chemiluminescence in the 285–550 nm spectral range. Operating conditions of a premixed laminar jet flame were dynamically varied in respect of equivalence ratio (<em>ϕ</em>), fuel composition (methane/hydrogen blend), and inert gas composition (carbon dioxide/nitrogen blend). Out of the >300 conditions investigated, 80 % served as training data and the remaining 20 % were analyzed to demonstrate the predictive accuracy. The overall mean absolute error (<span><math><mrow><mi>M</mi><mi>A</mi><mi>E</mi></mrow></math></span>) relative to the ground truth data for <em>ϕ</em> was 0.016, for the methane/hydrogen blend 1.62 %, and for the inert gas variation 0.3 %. To further test the networks performance, the network was also applied to randomly selected spectra from a second dataset acquired under slightly different conditions in respect of gas exit velocity and background illumination. This analysis also achieved low <span><math><mrow><mi>M</mi><mi>A</mi><mi>E</mi><mi>s</mi></mrow></math></span> of 0.04 for <em>ϕ</em>, 4.6 % for the methane/hydrogen, and 0.49 % for inert gas variation. The standardized absolute deviation (<span><math><mrow><mi>S</mi><mi>A</mi><mi>D</mi></mrow></math></span>), showed that there is no correlation between individual operating conditions and the related errors in the data analysis. An analysis time of 10 ms allows the network to be used for real-time application.</div></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"23 ","pages":"Article 100345"},"PeriodicalIF":5.0,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0