Journal of The Energy Institute最新文献_第5页

Modeling of sustainable methanol production via integrated co-gasification of rice husk and plastic coupled with its prediction and optimization using machine learning and statistical-based models

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-13 DOI: 10.1016/j.joei.2025.102029

Jamilu Salisu , Ningbo Gao , Cui Quan , Hang Seok Choi , Qingbin Song

{"title":"Modeling of sustainable methanol production via integrated co-gasification of rice husk and plastic coupled with its prediction and optimization using machine learning and statistical-based models","authors":"Jamilu Salisu , Ningbo Gao , Cui Quan , Hang Seok Choi , Qingbin Song","doi":"10.1016/j.joei.2025.102029","DOIUrl":"10.1016/j.joei.2025.102029","url":null,"abstract":"<div><div>To reduce reliance on fossil fuels and mitigate environmental impact, co-gasification of waste materials presents a promising alternative for methanol production. In modeling gasification process, kinetic-based models are predominant but are often complex and lack inherent optimization capabilities. This study couples a kinetic-based model with predictive models, aiming to provide an optimization-embedded and simplified simulation approach. Using Aspen Plus, an integrated model for methanol production via co-gasification of rice husk and plastic was developed. Model prediction and optimization were performed using response surface methodology (RSM) as a statistical approach and artificial neural network-genetic algorithm (ANN-GA) as a machine learning approach. Key input variables, including gasification temperature (GT), steam-to-feed ratio (STF), methanol production temperature (T) and pressure (P), were optimized for both the co-gasification and methanol sections. The integrated co-gasification-methanol model was successfully developed, achieving a root mean square error (RMSE) of 2.31 when validated with experimental data. Predictions using both ANN-GA and RSM methods yielded a coefficient of determination (R<sup>2</sup>) > 0.99, with ANN-GA showing superior prediction accuracy. Statistical analysis of variance (ANOVA) from the RSM results also confirmed the model significance. The optimal methanol yield was 0.6 kg/kg feed under GT = 850 °C, STF = 0.96–1.73, T = 234–255 °C, and P = 114–150 bar. While ANN-GA provided superior optimization across most variables, RSM was more effective for optimizing pressure. These findings demonstrate the effectiveness of integrating machine learning and statistical models with kinetic-based simulations for optimizing an integrated gasification-methanol system.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102029"},"PeriodicalIF":5.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519394","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}

引用次数: 0

A comparative investigation of biomass co-pyrolysis with polymeric wastes using electromagnetic induction heating

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-13 DOI: 10.1016/j.joei.2025.102023

Jannatul Ferdous, Md. Abu Rayhan Bhuiyan, Md. Belal Hossain Jisan, Fuhad Ahmed, Khandakar Akash, Mohammad Rofiqul Islam, Md. Abdul Kader

{"title":"A comparative investigation of biomass co-pyrolysis with polymeric wastes using electromagnetic induction heating","authors":"Jannatul Ferdous, Md. Abu Rayhan Bhuiyan, Md. Belal Hossain Jisan, Fuhad Ahmed, Khandakar Akash, Mohammad Rofiqul Islam, Md. Abdul Kader","doi":"10.1016/j.joei.2025.102023","DOIUrl":"10.1016/j.joei.2025.102023","url":null,"abstract":"<div><div>In this study, co-pyrolysis of biomass and polymeric wastes has been conducted in an electromagnetic induction (EMI)-heated fixed-bed reactor. The biomass feedstocks were water hyacinth (WH) and vegetable waste (VW), whereas the polymeric wastes were scrap tires (ST) and low-density polyethylene (LDPE). The maximum liquid yield of 67 wt.% was obtained with a WH/LDPE blend ratio of 30:70, at 450 °C for 50 min and with particle sizes ranging from 0.5 to 2 mm. The calorific value (CV) of the obtained co-pyrolysis oil was determined to be 40.38 MJ/kg. The co-pyrolysis-oil was characterized using gas chromatography-mass spectrometry (GC-MS) and fourier-transform infrared (FTIR) spectroscopy. The findings demonstrated that the oils had superior properties, such as a higher carbon and hydrogen content, and were mainly composed of aliphatic compounds, such as olefins. The addition of polymeric wastes (LDPE and ST) increased liquid yields even though the oils from VW/ST blends had greater amounts of sulfur and nitrogen. The results showed that the wastes in the study could be transformed into liquid products that could be used as alternatives to petroleum fuels in a variety of ways. It has also been proposed that the liquid product might be a good source of a number of useful chemical compounds.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102023"},"PeriodicalIF":5.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427790","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}

引用次数: 0

Pyrolysis mechanism and gasification characteristics of actual municipal solid waste: A kinetic study through two-stage reaction models

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-11 DOI: 10.1016/j.joei.2025.102026

Ruochen Yang , Lei Jiang , Can Tong , Li Song , Xiong Zhang , Wei Liao , Haiping Yang , Shihong Zhang , Hanping Chen

{"title":"Pyrolysis mechanism and gasification characteristics of actual municipal solid waste: A kinetic study through two-stage reaction models","authors":"Ruochen Yang , Lei Jiang , Can Tong , Li Song , Xiong Zhang , Wei Liao , Haiping Yang , Shihong Zhang , Hanping Chen","doi":"10.1016/j.joei.2025.102026","DOIUrl":"10.1016/j.joei.2025.102026","url":null,"abstract":"<div><div>Municipal solid waste (MSW) gasification technologies represent a novel approach to waste management, while research on the kinetic characteristics and gasification behavior of actual MSW remains limited. In this paper, a new two-step kinetic model combining the segmentation of the main pyrolysis stages of MSW with Coats-Redfern (C-R) method which was more suitable for describing the pyrolysis process of actual MSW was established. Then the pyrolysis mechanism, tar generation process and the interactions among components, were thoroughly investigated based on this kinetic model. The results show the two-stage approach can effectively improve the accuracy of the MSW pyrolysis kinetic model (R<sup>2</sup> > 0.989). The first stage of MSW pyrolysis conforms to the reaction order model, while the second stage aligns with the geometric contraction model. The average activation energies of the two pyrolysis stages are 70.49 and 120.62 kJ/mol, which demonstrated that the two-stage reaction follows different types of reactions. Gasification experiments of MSW, guided by the kinetic model, indicate that higher temperature (T > 700 °C) and equivalence ratios (ER) can promote the gasification of MSW and tar, under the optimized conditions, the H<sub>2</sub> yield increased from 0.08 to 1.82 mmol/g, and the CO yield increased from 0.26 to 1.92 mmol/g. Further increasing the ER (ER > 0.5) can inhibit the conversion of benzene and polycyclic aromatic hydrocarbons (PAHs) by promoting the generation of CO₂. Increasing the ER and employing flue gas combustion to raise the CO₂ concentration during the gasification process is an ideal method for suppressing the formation of benzene and PAHs.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102026"},"PeriodicalIF":5.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437377","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}

引用次数: 0

Experimental study on performance and emission optimization of MgO nanoparticle-enriched 2nd generation biodiesel: A method for employing nanoparticles to improve cleaner diesel combustion 富含氧化镁纳米粒子的第二代生物柴油性能和排放优化实验研究：利用纳米颗粒改善柴油清洁燃烧的方法

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-11 DOI: 10.1016/j.joei.2025.102024

Arif Savaş , Ramazan Şener , Samet Uslu , Oğuzhan Der

{"title":"Experimental study on performance and emission optimization of MgO nanoparticle-enriched 2nd generation biodiesel: A method for employing nanoparticles to improve cleaner diesel combustion","authors":"Arif Savaş , Ramazan Şener , Samet Uslu , Oğuzhan Der","doi":"10.1016/j.joei.2025.102024","DOIUrl":"10.1016/j.joei.2025.102024","url":null,"abstract":"<div><div>An important issue in reducing exhaust emissions and enhancing engine performance is transitioning from conventional fuels to renewable energy-based technologies. This shift is particularly crucial for compression ignition engines, which are widely used in the transportation industries. This study investigates the performance and emission characteristics of a compression ignition engine fueled with second-generation jojoba biodiesel, enhanced using MgO-based nano additives. Experiments were performed under variable load conditions ranging from 0.5 to 3.0 kW, with different concentrations of MgO (50 ppm, 100 ppm and 150 ppm) incorporated into the biodiesel blends. Response Surface Methodology (RSM) was employed to optimize fuel composition and operating conditions for maximum efficiency and minimum emissions. The results indicated a 6.7 % reduction in BSFC and a 7.3 % increase in BTE attributed to the improved combustion efficiency through the addition of 100 ppm MgO. Additionally, CO and HC emissions were reduced by 12.7 % and 30.1 %, respectively. Using RSM, the optimum parameters were found at a load of 1.49 kW and a MgO concentration of 40.9 ppm, achieving a desirability score of 0.7489. This study confirms that jojoba biodiesel with MgO nano additives shows significant potential as an eco-friendly alternative fuel, improving engine performance and reducing emissions. The findings provide valuable insights into its application, particularly in promoting environmental sustainability within the energy sector.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102024"},"PeriodicalIF":5.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422568","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}

引用次数: 0

Catalytic hydrothermal liquefaction of algae biomass for the production of high quality bio-oil: Effects of active metals and reaction process parameters

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-08 DOI: 10.1016/j.joei.2025.102018

Yanfang Zhu, Yibing Qin, Wenqi Song, Xiaoyuan Jin, Yuzhen Zhao

{"title":"Catalytic hydrothermal liquefaction of algae biomass for the production of high quality bio-oil: Effects of active metals and reaction process parameters","authors":"Yanfang Zhu, Yibing Qin, Wenqi Song, Xiaoyuan Jin, Yuzhen Zhao","doi":"10.1016/j.joei.2025.102018","DOIUrl":"10.1016/j.joei.2025.102018","url":null,"abstract":"<div><div>Catalytic hydrothermal liquefaction (HTL) has the potential to convert wet Nannochloropsis algae (NA) biomass waste into high-quality bio-oil. This study systematically investigates the effects of Ni, Ce, and Ce-Ni bimetals supported on ZnAl₂O₄ in enhancing bio-oil yield and quality. The bimetallic Ni-Ce/ZnAl₂O₄ catalyst in HTL of NA, using ethanol as a solvent, produced the highest bio-oil yield (56.8 wt%) compared to methanol (54.0 wt%) and water (43.8 wt%) at 280 °C for a reaction time of 45 min. The obtained bio-oils were characterized using various analytical methods. Compared to non-catalytic liquefaction, the Ni-Ce bimetallic catalysts significantly promoted hydrodeoxygenation and esterification, enhancing bio-oil quality. The highest yields of hydrocarbons (13.52 %) and esters (69.86 %) in the bio-oil were achieved using the Ni-Ce catalyst supported on ZnAl₂O₄. Furthermore, during catalytic liquefaction, the bio-oil exhibited a carbon content of 78.9 wt% and an oxygen content reduced to 13.3 wt%, resulting in a higher HHV of 35.6 MJ/kg bio-oil obtained. The introduction of Ni-Ce bimetallic catalysts also increased the low boiling point to 44.5 % containing function compounds in the bio-oil. The Ni-Ce/ZnAl₂O₄ catalyst demonstrated excellent stability and reusability, maintaining its performance after five cycles. These experimental findings provide valuable insights for future research on the aquatic algae biomass into quality bio-oil production.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102018"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454016","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}

引用次数: 0

Nitrogen migration and transformation in gasification chars prepared from torrefied fiberboard

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-01 DOI: 10.1016/j.joei.2024.101946

Deliang Xu , Ming Zhao , Jun Sun , Lei Shi , Juntao Wei , Xun Hu , Bin Li , Shu Zhang

{"title":"Nitrogen migration and transformation in gasification chars prepared from torrefied fiberboard","authors":"Deliang Xu , Ming Zhao , Jun Sun , Lei Shi , Juntao Wei , Xun Hu , Bin Li , Shu Zhang","doi":"10.1016/j.joei.2024.101946","DOIUrl":"10.1016/j.joei.2024.101946","url":null,"abstract":"<div><div>Low-temperature thermal conversions can efficiently modify nitrogen configurations in biomass. This study focused on nitrogen migration and transformation during the torrefaction and subsequent gasification of fiberboard (FB), a common bioresource sourced from waste furniture, flooring, etc., which is characterized by high nitrogen content. The results indicated that as torrefaction temperatures reached 230 °C, the nitrogen loss rates in FB gradually decreased with further increased temperatures. This trend was primarily attributed the significant nitrogen loss due to the decomposition of urea formaldehyde (UF) before 230 °C. When the temperature rose to higher levels, the pyrolysis of lignocellulose caused the generation of active oxygen-containing groups, facilitating nitrogen re-fixation in chars. Moreover, amide-N in the FB was converted into more stable forms, pyrrole (N-5) and pyridine (N-6), thereby reducing the conversion of nitrogen into volatile compounds. During the gasification process, as torrefaction temperatures increased, the contents of quaternary nitrogen (N-Q) and nitrogen oxide (N-O) increased in the gasification chars from torrefied FB, while the contents of N-5 and N-6 decreased. This study analyzed the nitrogen migration pathways in torrefaction vs. torrefaction-gasification, exploring potential transformation mechanisms such as deamination reactions, Maillard reactions, and ring condensation reactions. These findings provide a crucial theoretical foundation for optimizing the treatment of waste FB and understanding the nitrogen migration and transformation during torrefaction-gasification integral process.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101946"},"PeriodicalIF":5.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176440","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}

引用次数: 0

Efficient hydrodeoxygenation of lignin-derived oxygenates over Ni/Al2O3-C catalyst under mild conditions

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-01 DOI: 10.1016/j.joei.2024.101944

Bowen Luo , Xiaoxin Chen , Yongxiang Guo , Riyang Shu , Chao Wang , Jianping Liu , Junyao Wang , Zhipeng Tian , Ying Chen

{"title":"Efficient hydrodeoxygenation of lignin-derived oxygenates over Ni/Al2O3-C catalyst under mild conditions","authors":"Bowen Luo , Xiaoxin Chen , Yongxiang Guo , Riyang Shu , Chao Wang , Jianping Liu , Junyao Wang , Zhipeng Tian , Ying Chen","doi":"10.1016/j.joei.2024.101944","DOIUrl":"10.1016/j.joei.2024.101944","url":null,"abstract":"<div><div>Hydrodeoxygenation (HDO) is a crucial technique for upgrading biomass-derived compounds, playing a significant role in the advancement of sustainable energy technologies. Under harsh reaction conditions, conventional HDO catalysts often suffer from reduced efficiency due to particle aggregation. This study presents a highly efficient Ni/Al<sub>2</sub>O<sub>3</sub>-C catalyst that mitigates this issue by stabilizing Ni metal particles and enhancing metal-support interactions. Characterization of the catalyst was carried out using XRD, TEM, and CO-TPD, which revealed that the incorporation of Al species improved metal dispersion and reduced the size of the Ni particles. Guaiacol, a phenolic compound derived from lignin, was chosen to evaluate the HDO performance under mild conditions. The optimized Ni/3Al<sub>2</sub>O<sub>3</sub>-5C catalyst achieved a guaiacol conversion of 99.9 % with a cyclohexane selectivity of 99.8 % at 210 °C. The outstanding performance is attributed to the high hydrogenation capacity of the small Ni particles and the acid sites on the carbon surface. Metal-support interactions stabilize the Ni particles, preventing leaching and deactivation. The catalyst has also exhibited comparable effectiveness in the HDO of both lignin-derived compounds and lignin-oils, confirming its adaptability across various substrates. The study demonstrates that Al<sub>2</sub>O<sub>3</sub>-C plays a crucial role in enhancing both the structural stability and catalytic efficiency of HDO catalysts, offering a promising approach for upgrading biomass-derived compounds.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101944"},"PeriodicalIF":5.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176442","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}

引用次数: 0

Study on the kinetics and energy transfer during ignition of methane excited by NRP-SDBD non-equilibrium plasma

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-01 DOI: 10.1016/j.joei.2024.101929

Ziying Xin , Xucong Li , Zhencao Zheng , Yong Hu , Ruijiao Cao , Ao Sun , Feiyang Zhao , Wenbin Yu

{"title":"Study on the kinetics and energy transfer during ignition of methane excited by NRP-SDBD non-equilibrium plasma","authors":"Ziying Xin , Xucong Li , Zhencao Zheng , Yong Hu , Ruijiao Cao , Ao Sun , Feiyang Zhao , Wenbin Yu","doi":"10.1016/j.joei.2024.101929","DOIUrl":"10.1016/j.joei.2024.101929","url":null,"abstract":"<div><div>The energy deposition distribution is crucial factor during plasma assisted ignition (PAI) influenced by streamer morphology, electric field, electron density and gas temperature. This paper presents numerical studies on energy transfer induced by gas heating and kinetic enhancement effect during ignition of lean and stoichiometric CH<sub>4</sub>/O<sub>2</sub>/He mixture excited by NRP-SDBD plasma. The two-dimensional plasma solver PASSKEy is employed to analyze hydrodynamic perturbation in a very small time-spatial scale for CH<sub>4</sub>/O<sub>2</sub>/He mixture with different equivalence ratios. A faster early perturbation response after plasma excitation occurs for stoichiometric CH<sub>4</sub>/O<sub>2</sub>/He mixture owing to more concentrated energy release. The plasma-participant path flux analysis model is newly developed to reveal the kinetic effects of key plasma species, dominant global reaction paths for oxidation of CH<sub>4</sub>. It is highlighted that the important role of CH<sub>4</sub>(v13) and O(1D) enriched at higher PRF by plasma-oriented kinetic reactions on formation of active radical O atoms and key intermediate CH<sub>3</sub>. High PRF is beneficial for release of H atoms along with the reduced consumption for O<sub>2</sub> on the global reaction path of conversion from CH<sub>4</sub> to CO<sub>2</sub>. Ultimately, the energy efficiency of gas heating is discussed from the view of plasma kinetics. The enrichment of O(1D) and charged species owing to improved PRF facilitates increase in the proportion of total discharge energy spent on gas heating attributed to the quenching reactions of O(1D) and recombination reactions of charged particles.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101929"},"PeriodicalIF":5.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176606","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}

引用次数: 0

Characteristics of enhanced plasma in ethanol liquid-phase discharge with a third electrode

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-01 DOI: 10.1016/j.joei.2024.101909

Tonghui Zhu , Qiuying Wang , Zhonglin Yu , Yuanyuan Wang , Xiaomei Zhu , Bing Sun

引用次数: 0

Real-time evolution of the microstructure of coals with different metamorphic degrees during rising-temperature oxidation by synchrotron radiation SAXS-WAXS

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-01 DOI: 10.1016/j.joei.2024.101913

Yingfeng Sun , Shuaipeng Zhu , Ping Chen , Yixin Zhao , Fei Xie , Hui Wang , Changjiang Ji , Zhaoying Chen , Qifei Wang

{"title":"Real-time evolution of the microstructure of coals with different metamorphic degrees during rising-temperature oxidation by synchrotron radiation SAXS-WAXS","authors":"Yingfeng Sun , Shuaipeng Zhu , Ping Chen , Yixin Zhao , Fei Xie , Hui Wang , Changjiang Ji , Zhaoying Chen , Qifei Wang","doi":"10.1016/j.joei.2024.101913","DOIUrl":"10.1016/j.joei.2024.101913","url":null,"abstract":"<div><div>Considering the difficulty of balancing real-time and simultaneous in previous studies on pore structure and microcrystalline structure during coal rising-temperature oxidation, this paper simulated the rising-temperature oxidation of three coals by setting the rising-temperature rate and range based on the sample heating furnace. The synchrotron radiation in-situ small-angle X-ray scattering and wide-angle X-ray scattering (SAXS-WAXS) simultaneous tests were carried out. The results show that as the temperature increases, the pore structure of long-flame coal tends to be simpler and more regular with more abundant macropores, and lean coal is relatively more stable, while anthracite is more active in the early period of rising-temperature oxidation with significant development of mesopores. The changes in mesopores of three coals during the entire rising-temperature oxidation are dominated by pores of 10∼20 nm, while pores of 50∼60 nm, 60∼70 nm, and 70∼80 nm dominate the changes in macropores of long-flame coal, lean coal, and anthracite, respectively. Furthermore, the changes in the microcrystalline structure of three coals show two stages: Physical desorption (20∼200 °C): the removal of water molecules and weakly adsorbed gases causes the carbon skeleton structure to become relatively loose; thermal decomposition (200∼300 °C): the intensification of pyrolysis reactions leads to a much higher polycondensation of aromatic layers.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101913"},"PeriodicalIF":5.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176808","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}

引用次数: 0