Journal of The Energy Institute最新文献

{"title":"Synergistic effect of various nanoparticles infused biodiesel/diesel blends on combustion, performance, and environmental characteristics of a CI engine","authors":"Aqueel Ahmad ,&nbsp;Ashok Kumar Yadav ,&nbsp;Ashok Kumar Dewangan","doi":"10.1016/j.joei.2025.102117","DOIUrl":"10.1016/j.joei.2025.102117","url":null,"abstract":"<div><div>The growing demand for sustainable and green alternatives to conventional diesel has driven the search of biodiesel blends, with nanoparticle additives improving combustion efficiency and emission reduction. This study explores the performance, combustion, and emissions characteristics of a diesel engine using biodiesel-diesel blended with graphene oxide (GO), magnesium oxide (MgO), and multi-walled carbon nanotubes (MWCNT) nanoparticles. The B20 biodiesel blend was prepared with 80 % diesel and 20 % waste cooking oil-driven biodiesel, and the nanoparticles were added at 90 ppm using a water bath sonicator for proper dispersion. Engine tests were conducted under variable load conditions for test blends (B20, B20+GO, B20+MgO, and B20+MWCNT) and compared with baseline diesel (D100). The results exhibited substantial enhancements in engine performance and combustion efficiency for nanoparticle-dispersed biodiesel blends as compared to D100 and B20 blends without nanoparticles. The B20+MWCNT blend achieved a 12.40 % higher BTE and a 9.67 % lower in BSFC compared to baseline diesel. Additionally, this blend presented higher heat release rate (HRR), peak cylinder pressure (PCP), and exhaust gas temperature (EGT). Emission reductions were observed, with CO, CO₂, UBHC, and NO_x emissions decreasing by 60 %, 16 %, 36.84 %, and 9.02 %, respectively, compared to baseline diesel at full load condition. The study emphasizes the potential of nanoparticle-enhanced biodiesel blends to enhance engine efficiency while reducing harmful emissions.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102117"},"PeriodicalIF":5.6,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic catalysis of Ni3P/N@C for efficient hydrodeoxygenation: Unraveling the role of Ni3P-N interactions in hydrogen transfer and C-O bond cleavage","authors":"Yu-Qian Zhang ,&nbsp;Xing Fan ,&nbsp;Zhong-Qiu Liu ,&nbsp;Yang-Chao Zhang ,&nbsp;Yang-Yang Xu ,&nbsp;Jian-Fang Xu ,&nbsp;Hai-Xu Zou ,&nbsp;Xian-Yong Wei","doi":"10.1016/j.joei.2025.102103","DOIUrl":"10.1016/j.joei.2025.102103","url":null,"abstract":"<div><div>The catalytic hydrodeoxygenation (CHDO) of coal-derived oxygenates into high-value aromatic hydrocarbons is pivotal for sustainable coal valorization, yet challenges remain in achieving efficient hydrogen activation and selective C-O bond cleavage. Although the individual catalytic roles of metals and alkaline sites in CHDO are well established, in which metals primarily activate H₂ to form H<strong>^…</strong>H species and alkaline sites facilitate C-O bond cleavage by providing H⁻ species, the structure-activity relationship and hydrogen transfer dynamics in composite catalysts integrating both components remain inadequately understood. This knowledge gap hinders the rational design of catalysts with enhanced performance in CHDO. In this study, a series of Ni₃P/N@C catalysts, integrating both Ni₃P and N-alkaline functionalities, were synthesized via calcination of Ni₃P precursors at 400–800 °C, resulting in integrates metallic Ni₃P nanoparticles with N-doped carbon supports to synergistically enhance hydrogen transfer and deoxygenation. Among these catalysts, Ni₃P/N@C-600 exhibited superior catalytic activity and stability in CHDO reactions, effectively removing oxygen from the oxygen-containing compounds in the sequential thermal dissolution products, converting 91.6 % of O₄-O₆ class species to lower oxygen class (O₃-O₁) compounds. Structural characterization and mechanistic analysis revealed that the synergistic interaction between Ni₃P and N-alkaline sites enhances hydrogen activation, with Ni₃P facilitating H₂ dissociation and N-alkaline sites providing mobile H⁻ and surface-bound H⁺, thereby promoting selective C-O bond cleavage and accelerating CHDO efficiency. This work offers fundamental insights into the cooperative mechanisms of metal-alkaline catalysts and provides a strategic framework for the design of highly efficient catalysts for coal-derived aromatic hydrocarbon production.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102103"},"PeriodicalIF":5.6,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluate the effect of different butanol isomers on engine exhaust soot particles","authors":"Xiaoyu Guo ,&nbsp;Lina Zhang ,&nbsp;Hui Wang ,&nbsp;Haozhong Huang ,&nbsp;Yi Wang ,&nbsp;Kongzhao Xing","doi":"10.1016/j.joei.2025.102104","DOIUrl":"10.1016/j.joei.2025.102104","url":null,"abstract":"<div><div>The chemical properties of soot particles are correlate with the catalytic regeneration efficiency of DPF. The surface chemistry of soot particles generated from the combustion of oxygenated fuels merits focused investigation, especially considering that the particle chemistry among isomer fuels remains insufficiently characterized. In this study, the chemical properties and oxidative activity of soot particles from different butanol isomers were analysed by FT-IR, XPS and TGA. The results indicated that, compared with D100, the O/C ratio of oxygenated fuel particles increased by approximately 159–358 % under 1.2 MPa load, whereas the difference was not significant at 0.6 MPa load. The content of oxygenated functional groups on particle surface increased with the load increase. When the load was increased to 1.2 MPa, the C-O (aliphatics) groups in D100 and TB50 particles were converted to C=O groups, while the corresponding groups in other fuel particles were converted mainly to C-O (aromatics) groups. Moreover, IB50 exhibited the smallest sp3/sp2 ratio (0.15 and 0.22 respectively), indicating a low degree of carbon layer disorder, fewer surface defects, and a lower content of aliphatic/oxygenated functional groups, which consequently led to the highest Ea. Linear analysis revealed a high linear correlation between the O/C ratio and Ea. For instance, NB50 had a high O/C ratio (0.3 and 0.62 respectively), resulting in a lower Ea and higher oxidative activity. Furthermore, changes in engine load altered the particle structure. Some functional groups showed little or no linear relationship with the oxidative activity of soot particles at high loads.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102104"},"PeriodicalIF":5.6,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of temperature-dependent speciation data on the development of HyChem Model for RP-3 kerosene","authors":"Yecheng Song ,&nbsp;Shijie Bai ,&nbsp;Shilong Li ,&nbsp;Minglei Wang ,&nbsp;Shumeng Zhang ,&nbsp;Dongping Chen ,&nbsp;Kun Wang","doi":"10.1016/j.joei.2025.102112","DOIUrl":"10.1016/j.joei.2025.102112","url":null,"abstract":"<div><div>Modeling the combustion chemistry of multi-component liquid fuels, such as RP-3 kerosene, faces intricate challenges. A recently proposed HyChem approach offers a physics-based modeling path, with models constrained by experimental speciation data followed by validation by global combustion properties. Intermediate speciation data obtained under appropriate temperature and/or reaction time are crucial for the HyChem model development, yet their impact has not been fully elucidated. The primary objective of the present study was to investigate the impact of temperature-dependent speciation data on the development of HyChem models. Pyrolysis and oxidation experiments were conducted in a flow reactor system over a temperature range of 1000 K–1355 K to characterize the distribution of critical intermediate species during RP-3 decomposition. Multiple HyChem models were developed based on speciation data obtained from experiments conducted at various temperatures. These models were subsequently validated using global combustion properties, specifically ignition delay time and laminar flame speed. The HyChem models were developed using speciation datasets from various temperatures, resulting in different stoichiometric and rate coefficients in their fuel decomposition submodel. Despite these differences, most models showed remarkably consistent predictions that closely aligned with experimental measurements of global combustion properties. The above findings in the present study may relieve the researchers in the selection and determination of experimental conditions for obtaining speciation data to the development of HyChem models.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102112"},"PeriodicalIF":5.6,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gasification characteristics and kinetics of pyrolysis-derived coal chars under a CH4-containing atmosphere","authors":"Cheng Ma ,&nbsp;Silin Meng ,&nbsp;Yuzhen Zhao ,&nbsp;Yang Zhao ,&nbsp;Chong Zou ,&nbsp;Zongcheng Miao","doi":"10.1016/j.joei.2025.102113","DOIUrl":"10.1016/j.joei.2025.102113","url":null,"abstract":"<div><div>The CO₂ gasification technology of char represents a crucial approach for achieving environmentally sustainable and effective utilization of low-rank coal. Thermogravimetric analysis (TGA) was applied to investigate the CO₂ gasification properties and kinetics of chars prepared by low-rank coal pyrolyzed in the N₂ and CH₄-containing atmospheres. The physicochemical properties of the chars were analyzed through Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), micro-Raman spectroscopy, and CO₂ adsorption techniques. The gasification activation energy (<em>E</em>_<em>α</em>) of chars was determined by the Flynn-Wall-Ozawa (FWO) approach, and the gasification reaction mechanisms were elucidated through the Malek method. The findings suggest that the CH₄-containing atmosphere significantly increased the proportion of graphitic carbon (C-C) structures and enhanced the graphitization degree (<em>A</em>_G/<em>A</em>_All) in char, while reducing its specific surface area. Further analysis revealed that the C-C structure proportion, volatile matter content, <em>A</em>_G/<em>A</em>_All, and specific surface area of char-CH₄ showed strong linear correlations (<em>R</em>² &gt; 0.9) with its gasification reactivity and activation energy. The CH₄-containing atmosphere reduced the gasification activity of char. Additionally, the CO₂ gasification processes of char could be described by the two-dimensional diffusion mechanism (<em>α</em> = 0.2–0.5) and the three-dimensional diffusion model (<em>α</em> = 0.6–0.9), respectively.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102113"},"PeriodicalIF":5.6,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogen production from methane dry reforming on coke-resistant Pr-doped Co/mesoporous alumina catalysts","authors":"Bui T. Thu-Thao ,&nbsp;Ngoc-Dung Lai ,&nbsp;Ponnusamy Senthil Kumar ,&nbsp;Tan Ji Siang ,&nbsp;Thuy-Phuong T. Pham ,&nbsp;Natarajan Rajamohan ,&nbsp;Shams Forruque Ahmed ,&nbsp;G. Abdulkareem-Alsultan ,&nbsp;Aishah Abdul Jalil ,&nbsp;Mohammad Yusuf ,&nbsp;Dai-Viet N. Vo","doi":"10.1016/j.joei.2025.102116","DOIUrl":"10.1016/j.joei.2025.102116","url":null,"abstract":"<div><div>Dry reforming of methane, DRM is largely recognized as a promising route for generating H₂ energy to substitute fossil fuels. In this work, the promotional effect of praseodymium dopant (0-7 wt %) on the performance and coking resistance of mesoporous alumina (MA)-dispersed Co catalysts was investigated at a stoichiometric DRM feed composition and 650–750 °C. Pr promotion considerably reduced Co₃O₄ crystal dimension from 16.8 to 7.8 nm and 5Pr10Co/MA possessed the smallest Co₃O₄ crystallite size. The total basic site concentration was boosted with Pr addition from 66.8 to 169.7 μmol CO₂ <span><math><mrow><msubsup><mi>g</mi><mrow><mi>c</mi><mi>a</mi><mi>t</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msubsup></mrow></math></span>. Stable CH₄ conversion with time-on-stream was evidenced on Pr-promoted catalysts (1 %-5 %Pr) because of enhancing basic site concentration and CO₂ adsorption. Notably, 5Pr10Co/MA achieved the greatest CH₄ (90.91 %) and CO₂ (82.13 %) conversions at 700 °C and exhibited the highest coke resistance with the least carbon deposition percentage (0.87 %) and carbon formation rate (2.42 × 10⁻⁵ <span><math><mrow><msub><mi>g</mi><mrow><mi>c</mi><mi>a</mi><mi>r</mi><mi>b</mi><mi>o</mi><mi>n</mi></mrow></msub><mspace></mspace><msubsup><mi>g</mi><mrow><mi>c</mi><mi>a</mi><mi>t</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msubsup></mrow></math></span> min⁻¹) owing to the smallest Co₃O₄ crystallite size, oxygen vacancy and redox attributes. An enhancement in H₂ yield from 52.52 % to 87.94 % was evidenced on 5Pr10Co/MA with rising temperature from 650 to 750 °C. The two-step mechanism for coke suppression triggered by a redox PrO₂/Pr₂O₃ pair was also elaborated in this study.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102116"},"PeriodicalIF":5.6,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co-pyrolysis of Chlorella pyrenoidosa and polystyrene: kinetics and product distributions","authors":"Dezhi Kong ,&nbsp;Susu Wang ,&nbsp;Yuqi Wang ,&nbsp;Haitao Chen ,&nbsp;Qiangu Yan ,&nbsp;Yijiang Gong ,&nbsp;Rui Li","doi":"10.1016/j.joei.2025.102109","DOIUrl":"10.1016/j.joei.2025.102109","url":null,"abstract":"<div><div>Co-pyrolysis of algae with polystyrene (PS) offers a promising and efficient approach to enhancing the quality of algae-derived bio-oil. This study investigated the thermal decomposition behavior, activation energy, and product distribution during the co-pyrolysis of <em>Chlorella pyrenoidosa</em> (CP) and PS. Thermal decomposition behavior was analyzed using non-isothermal thermogravimetric analysis (TGA) at heating rates of 10–40 °C/min. The activation energies were calculated using the OFW, KAS, and STK methods. Product distributions were examined using Py-GC/MS at 600 °C. TGA results revealed that the co-pyrolysis of CP and PS proceeded through four stages. Increasing CP proportions shifted pyrolysis temperatures toward higher values. The addition of PS significantly reduced the apparent activation energy, with the strongest positive synergistic effect at a CP5PS5 ratio. The average apparent activation energies for CP5PS5 were 180, 179, and 179 kJ/mol, as determined by the OFW, KAS, and STK methods, respectively. Py-GC/MS analysis revealed significant changes in the bio-oil composition with increasing PS content. The yields of MAHs and PAHs increased, while aliphatic hydrocarbons, oxygen-containing compounds, and nitrogen-containing compounds decreased. At a CP5PS5 ratio, MAHs increased to 67.09 %, PAHs increased to 30.22 %, oxygen-containing compounds dropped to 2.05 %, and nitrogen-containing compounds became undetectable. Co-pyrolysis of algae with PS provides a simple, effective, and scalable approach for upgrading bio-oil quality while simultaneously contributing to the management of plastic waste.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102109"},"PeriodicalIF":5.6,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on decoupling of in-cylinder combustion process of diesel/ammonia dual fuel engine","authors":"Li Ruina ,&nbsp;Liu Feifan ,&nbsp;Yang Dahai ,&nbsp;Hu Quan ,&nbsp;Yue Hua ,&nbsp;Meng Yang ,&nbsp;Liu Shuai","doi":"10.1016/j.joei.2025.102106","DOIUrl":"10.1016/j.joei.2025.102106","url":null,"abstract":"<div><div>Ammonia molecules contain no carbon atoms, which is a kind of clean fuel for diesel engines. The dual-fuel mode, combining ammonia and diesel, is an effective way for ammonia used in diesel engine, which complicates the combustion process. In order to decouple the combustion of diesel and ammonia, a bench test was conducted at 2700 rpm and 75 % load, and the in-cylinder pressure and instantaneous heat release at ammonia substitution rates of 0 %, 10 %, and 20 % were measured and analyzed. In addition, a combustion process model for ammonia and diesel fuel was developed, and a method for decoupling combustion characteristics based on consistent starting time of heat release was proposed. The results indicated that in the dual-fuel combustion mode (diesel/ammonia), the heat release curve was changed from a single peak to a double peak. The addition of ammonia reduced the pre-premixed heat release ratio, leading to a decrease in the peak instantaneous heat release rate and an extension of the combustion duration. As the ammonia substitution rate increased, the rate of ammonia consumption at the same crankshaft angle was significantly reduced. The burned mass center of ammonia (M50-NH₃) was delayed by 4.2°CA, and the amount of unburned ammonia escaping was increased. After ammonia was added, the combustion area in the cylinder was extended toward the combustion chamber wall, and the high-temperature area in the center of the combustion chamber was decreased. With the increase in ammonia substitution rate, NH₂+NO₂=H₂NO + NO became the most sensitive reaction, which was the main reaction that promoted ammonia combustion. The maximum ammonia substitution rate was 40 % at the maximum torque condition.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102106"},"PeriodicalIF":5.6,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combustion characteristics in a diesel engine running on a diesel fuel produced by the Fischer-Tropsch synthesis process from lignite","authors":"Mersin Hürpekli ,&nbsp;Ahmet Necati Özsezen","doi":"10.1016/j.joei.2025.102115","DOIUrl":"10.1016/j.joei.2025.102115","url":null,"abstract":"<div><div>In this study, Fischer-Tropsch (FT) diesel produced by the liquefaction synthesis of lignite mined in Türkiye was used as an alternative to conventional diesel and its combustion and emission characteristics were observed. The fuel injection timing was also varied on a diesel engine running on FT diesel and petrol-based diesel to evaluate the effect of fuel injection timing. The findings indicated that the initiation and completion of combustion occurred earlier with FT diesel compared to petroleum-based diesel, resulting in elevated in-cylinder gas temperatures. The advancement of injection timing was observed to enhance the engine's knock tendency for both fuels, while the retardation of injection timing exhibited a mitigating effect on engine knock. The findings indicate that the combination of FT diesel with injection strategies has the potential to reduce emissions of total hydrocarbons, carbon monoxide, carbon dioxide, and soot by 50 %, 48.7 %, 7.8 %, and 50 %, respectively, while only experiencing a slight power reduction of up to 4.6 %. The analysis of its fuel properties, combustion characteristics, knock tendency, and emissions performance indicates that FT diesel is a viable alternative fuel for diesel engines without the necessity for modifications to engine systems. It is also worth noting that the use of FT diesel can lead to a reduction in knock tendency through the optimization of fuel injection strategies.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102115"},"PeriodicalIF":5.6,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Infrared imaging for two-dimensional soot and temperature measurements in laminar premixed and non-premixed flames","authors":"Jiwei Zhou ,&nbsp;Lei Xu ,&nbsp;Jianguo Du ,&nbsp;Liuhao Ma ,&nbsp;Yu Wang","doi":"10.1016/j.joei.2025.102111","DOIUrl":"10.1016/j.joei.2025.102111","url":null,"abstract":"<div><div>Spectral soot emission (SSE) is an effective flame imaging technique for retrieving soot and temperature field. Currently, the application of SSE is focused on the visible to near-infrared range, but the accuracy is strongly related to the complex wavelength-dependence of soot absorption function of <em>E</em>(<em>m</em>)_λ. Our previous study in a premixed flat flame has demonstrated high-fidelity SSE measurements by using an <em>infrared</em> spectral range. Here, we extend previous work to investigate, for the first time, the reliability of SSE-based infrared imaging for <em>two-dimensional</em> temperature measurements in both premixed flat flames and non-premixed coflow flames. The performance of SSE measurements within different wavelength ranges have been evaluated through a cross-comparison with other established techniques and with numerical predictions. It is found that SSE measurements using wavelength in the infrared range of 1100–1400 nm could provide more reliable temperature results in both premixed and non-premixed flames, showing improved accuracy than the visible-SSE measurements in the spectral range of 660–905 nm. The reason could be correlated to the weak (strong) sensitivity of <em>E</em>(<em>m</em>)_λ to spectral variation in the infrared (visible) region, as inferred from the parallel <em>two-dimensional</em> extinction-based soot measurements at different wavelengths of 660–1400 nm. The present study demonstrates the benefits of infrared imaging for accurate extinction-based soot and SSE-based temperature measurements. The results are expected to guide the development of accurate and cost-effective two-dimensional SSE-pyrometry.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102111"},"PeriodicalIF":5.6,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}