Fuel最新文献

{"title":"The coupling of propane and methanol: enhancing hydrocarbon conversion and stability through integrated catalytic processes","authors":"Sirui Liu ,&nbsp;Jiaxing Zhang ,&nbsp;Limin Ren ,&nbsp;Mengnan Sun ,&nbsp;Xinwei Zhang ,&nbsp;Shuandi Hou ,&nbsp;Chunshan Song ,&nbsp;Xinwen Guo","doi":"10.1016/j.fuel.2025.135373","DOIUrl":"10.1016/j.fuel.2025.135373","url":null,"abstract":"<div><div>The integration of endothermic alkane activation and exothermic methanol conversion presents a promising strategy for enhancing energy efficiency and economic viability in hydrocarbon processing. Herein, we systematically investigate the propane-methanol co-reaction using a ZSM-5 catalyst, focusing on the effects of reaction conditions and the synergistic interactions between propane and methanol. The results reveal that at an optimized temperature of 475 °C and a 1:1 M ratio of propane to methanol, the introduction of methanol substantially enhances propane activation. Notably, the conversion mechanism shifts from monomolecular cleavage to bimolecular hydrogen transfer, effectively reducing the selectivity of by-products methane and ethylene from 66.8 % to 24.4 %, and increasing the selectivity of aromatics from 1.5 % to 25.9 %. Additionally, the co-feeding of propane and methanol extends the catalyst lifetime by promoting alkene-based cycles during methanol conversion. Comprehensive characterization of the spent catalysts indicates that the enhanced catalytic stability is attributed to the suppression of high carbonization and ordered coke species. These findings provide valuable insights into the catalytic mechanisms involved and highlight the potential for optimizing sustainable chemical production pathways.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135373"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"External fuel reforming for compression-ignition engines","authors":"Klyus Oleh ,&nbsp;Szczepanek Marcin ,&nbsp;Cisek Jerzy ,&nbsp;Olszowski Sławomir ,&nbsp;Behrendt Cezary ,&nbsp;Chybowski Leszek","doi":"10.1016/j.fuel.2025.135418","DOIUrl":"10.1016/j.fuel.2025.135418","url":null,"abstract":"<div><div>This paper presents the results of a study on the reduction of toxic exhaust gas emissions from compression-ignition engines by applying a fuel pretreatment. This treatment consists of contacting the fuel with a heterogeneous catalyst in the form of a Cu-Ni alloy applied to the nozzle needle in the fuel injector body. In this case, the pre-treatment of the fuel allows the fuel to reform. As determined in laboratory tests, fuel reforming is presented by an increase in the proportion of the olefin group in the atomised fuel and a decrease in the proportion of the paraffin group, which may indicate the occurrence of a fuel dehydrogenation reaction and the release of free hydrogen on contact with the catalyst. To apply the heterogeneous catalyst by electrospray fusion, the passive part of the atomiser needle was used, connecting the needle’s precision surfaces (its guide and firing cone). Laboratory tests of the atomiser modified in this way showed a change in the hydrocarbon groups of the fuel after contact with the catalyst. Results from bench tests of an experimental compression-ignition engine equipped with a pre-treated fuel injector showed a reduction in nitrogen oxide emissions of up to 30 %. Analysis of the engine process indicator diagrams shows that the achievement of such results is related to the reforming of the fuel, which leads to a reduction in the maximum pressure and heat release values, resulting in a reduction in the combustion temperature in the kinetic phase of the combustion process, responsible for the formation of nitrogen oxides in the engine cylinder. The applied electro-spark alloying method for the deposition of Cu-Ni catalysts on the passive part of the injector nozzle’s needle does not cause thermal distortion of the precision pair of the fuel injector and can be recommended for use both in the production process of injection equipment for compression-ignition engines and during their operation.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135418"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Challenges for accurately predicting the solubilities of Hg0 in various solvents and their impact on modelling the distribution of Hg0 throughout oil and gas infrastructure","authors":"Martin Müller ,&nbsp;Lhiam Paton ,&nbsp;Eleni Panteli ,&nbsp;Peter Crafts ,&nbsp;Eva M. Krupp ,&nbsp;Jörg Feldmann","doi":"10.1016/j.fuel.2025.135370","DOIUrl":"10.1016/j.fuel.2025.135370","url":null,"abstract":"<div><div>Oil and gas operators need to be able to understand how elemental mercury (Hg⁰) is distributed throughout their infrastructure to be able to minimise the cycling of Hg⁰ through their process systems. This is essential to be able to avoid Hg-induced corrosion, embrittlement and to guarantee the safety of their workers. However, determining Hg concentrations directly at high temperatures or pressures is difficult. An alternative is to model the mobility of Hg⁰ by first experimentally determining equilibrium solubilities in relevant solvent mixtures under manageable conditions. The van’t Hoff approximation has often been applied to monitor the quality of produced experimental data. This is possible by plotting the equilibrium solubility against temperature producing an exponential relationship. If the fit is poor, it may suggest an error occurred in the experimental protocol, otherwise the data can be used to predict Hg solubilities at extreme temperatures. Here we present Hg solubility data in various solvents, including methanol, ethylene glycol (MEG), triethylene glycol (TEG), hexane, methylcyclopentane and water, with the aim of highlighting issues extrapolating to high temperatures based on laboratory measurements. To do this we compared the van’t Hoff plot (exponential fit) with a second approach (quadratic fit). This showed that when extrapolating to industrially relevant temperatures, for solvents such as MEG, the Hg⁰ solubility can be 7.8 times higher when applying an exponential fit compared to the quadratic fit. Showcasing the potential for significant error when attempting to model the persistence of Hg across petrochemical infrastructure.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135370"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alum and anaerobic sludge-derived high-performance electrocatalyst for enhanced oxygen reduction reaction in microbial fuel cell","authors":"Lakshmi Pathi Thulluru ,&nbsp;Anil Dhanda ,&nbsp;Makarand M. Ghangrekar ,&nbsp;Shamik Chowdhury","doi":"10.1016/j.fuel.2025.135339","DOIUrl":"10.1016/j.fuel.2025.135339","url":null,"abstract":"<div><div>The present investigation demonstrates the facile synthesis of an inexpensive sludge-derived cathode electrocatalyst for application in microbial fuel cell (MFC). The electrocatalyst is prepared <em>via</em> hydrothermal treatment of a mixture of alum (AL) sludge and anaerobic (AN) sludge, derived from water and wastewater treatment plants, respectively. The as-synthesized catalyst (AL:AN = 2:1) possesses excellent physicochemical properties, along with the presence of pyridinic N and graphitic N moieties in its carbonaceous structure, leading to a superior electrochemical activity. The composite also presents a lower reduction in the relative current response (18.53 %) when subjected to an accelerated sulphide poisoning test compared to Pt/C (44.33 % reduction). Moreover, application of the synthesized catalyst (AL:AN = 2:1) in MFC results in a power density of 11.63 ± 1.61 W m⁻³, organic matter removal of 75.11 ± 3.57 %, and coulombic efficiency of 32.23 ± 0.83 %, which is comparable to the conventional MFC–platinum/carbon system (12.46 ± 0.86 W m⁻³). The results of this investigation endorse the utilization of the as-developed sludge composite as a cathode catalyst for field-scale applications of MFC. It also provides a cost-effective approach for sludge valorization and enhancing the performance of MFC, which is critical from the viewpoint of sustainable development.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135339"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive evaluation of energy consumption in LNG liquefaction plants and investigation of energy saving optimization","authors":"Kunrong Shen,&nbsp;Jin Wang,&nbsp;Linyan Chen","doi":"10.1016/j.fuel.2025.135301","DOIUrl":"10.1016/j.fuel.2025.135301","url":null,"abstract":"<div><div>Small-scale LNG plants play a crucial role in energy conversion but encounter challenges such as unclear energy consumption levels, rising operating costs, and environmental impacts. Despite the accumulation of substantial production data in existing plants, the lack of sophisticated analysis tools hinders the development of a systematic energy consumption evaluation strategy, thereby limiting the effectiveness of optimization measures. Based on a case study of the GY LNG plant with a design capacity of 1 × 10⁶ Nm³/d and actual operational data from 2020 to 2022, this study introduces an intelligent comprehensive evaluation method for the first time, establishing an energy consumption evaluation index system comprising 37 three-level indexes. Through field implementation, the energy consumption indexes are quantitatively assessed using rough set theory and fuzzy subordinate function to determine the energy efficiency level and optimization direction of each process system. The analysis reveals that the unit energy consumption of the plant was initially 0.6173 kW·h/kg, significantly higher than industry benchmarks. Furthermore, a steady-state simulation numerical model of the plant is developed to analyze the impact of key factors on energy consumption and identify energy consumption weaknesses through an analysis method. The study employs a genetic algorithm for parameter optimization, leading to a significant reduction in unit energy consumption and offering a viable pathway and production guidance for energy saving and consumption reduction in similar small-scale LNG plants. The optimization results demonstrate a 9.51 % reduction in unit energy consumption to 0.5586 kW·h/kg, translating to annual operational cost savings of approximately $580,000 with a payback period of 1.6 years. This research systematically evaluates the energy consumption of LNG plants and demonstrates that the implementation of energy consumption optimization measures not only reduces operating costs but also decreases greenhouse gas emissions by approximately 4,800 tonnes annually, thereby promoting the green transformation of small-scale LNG plants.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135301"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 methanation over Ru catalysts: Support engineering on the induction period via tuning metal-support interaction","authors":"Kai Jiang ,&nbsp;Xiaotian Zhou ,&nbsp;Yongzhen Gao ,&nbsp;Tao Yang ,&nbsp;Meng Zhang ,&nbsp;Zhihong Xu ,&nbsp;Zhongyi Liu","doi":"10.1016/j.fuel.2025.135413","DOIUrl":"10.1016/j.fuel.2025.135413","url":null,"abstract":"<div><div>Support engineering on the induction period during CO₂ methanation over Ru catalysts were highlighted. The evaluation at 400 °C illustrated that the initial reaction rate over Ru/CeO₂ (52.3 <span><math><mrow><mi>μ</mi><mi>m</mi><mi>o</mi><msub><mi>l</mi><msub><mrow><mi>CO</mi></mrow><mn>2</mn></msub></msub><mo>·</mo><msubsup><mi>g</mi><mrow><mi>cat</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msubsup><mo>·</mo><msup><mrow><mi>s</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup></mrow></math></span>) was the highest, whereas it showed an obvious proliferation over Ru/γ-Al₂O₃ and Ru/SiO₂ (from 33.0 and 46.3 to 59.9 and 51.8 <span><math><mrow><mi>μ</mi><mi>m</mi><mi>o</mi><msub><mi>l</mi><msub><mrow><mi>CO</mi></mrow><mn>2</mn></msub></msub><mo>·</mo><msubsup><mi>g</mi><mrow><mi>cat</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msubsup><mo>·</mo><msup><mrow><mi>s</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup></mrow></math></span>, respectively). The above three catalysts exhibited high CH₄ selectivity (&gt;96 %). However, Ru/TiO₂ showed the lowest reaction rate (14.0 <span><math><mrow><mi>μ</mi><mi>m</mi><mi>o</mi><msub><mi>l</mi><msub><mrow><mi>CO</mi></mrow><mn>2</mn></msub></msub><mo>·</mo><msubsup><mi>g</mi><mrow><mi>cat</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msubsup><mo>·</mo><msup><mrow><mi>s</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup></mrow></math></span>) with 100 % CO selectivity. The comprehensive characterization demonstrated that the relatively strong metal-support interaction (MSI) led to the difficult-to-reduce Ru<em>^χ</em>⁺ (<em>χ</em> = 3 or 4) species, which were responsible for the occurrence of the induction period. TiO_x overlayer on Ru/TiO₂ due to the overly strong MSI resulted in the absence of Ru⁰ and weak CO bonding, accompanied by the inferior performance and no CH₄ product. The basic sites and oxygen-containing groups on the support were involved in the formation of the intermediates. Furthermore, we discussed the reaction mechanisms over Ru catalysts through <em>in situ</em> DRIFTS technique. This work clearly illustrated the correlation between the induction period and MSI modulated via support engineering, which could provide some meaningful references for the rational design of the highly efficient CO₂ hydrogenation catalysts.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135413"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and simulation study on Compound optimization of water-based mucilage for inhibiting gas desorption from coal","authors":"Wenbin Jin ,&nbsp;Yanpeng Xu ,&nbsp;Duanwei Liu ,&nbsp;Zhi Li ,&nbsp;Tongrui Li ,&nbsp;Xin Wang ,&nbsp;Tianxiang Chen","doi":"10.1016/j.fuel.2025.135355","DOIUrl":"10.1016/j.fuel.2025.135355","url":null,"abstract":"<div><div>Abnormal gas outbursts induced by high-intensity mining operations in coal mines constitute a key factor in triggering underground gas limit exceedance accidents. This study focuses on inhibiting gas desorption from coal by employing a composite thickening agent (PAM + XTG) and a wetting agent (CDEA). Combined with viscosity tests, surface tension and contact angle measurements, as well as gas desorption experiments, we developed a novel, highly efficient water-based Mucilage for gas sealing and suppression in mines. Experimental results indicate that the thickening formulation containing 0.2 % XTG and 0.6 % PAM exhibits the best synergistic thickening performance, while also demonstrating the most significant inhibition of gas desorption. On this basis, the addition of 0.5 % CDEA as a wetting agent not only significantly enhances the coal’s wettability, achieving optimal performance, but also synergizes with the thickening agent to further strengthen the inhibition of gas desorption from the coal. Through molecular dynamics simulations, the superiority of the water-based mucilage formulation was further validated from perspectives such as the relative concentration of water molecules, radial distribution function, and diffusion coefficient, demonstrating its optimal wettability performance. Consequently, the water-based mucilage can rapidly wet the coal body, significantly reducing both the desorption amount and rate of gas within the coal, providing important theoretical support and practical guidance for the prevention and control of gas disasters in coal mines.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135355"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green synthesis of highly efficient and stable Ni@CQD nanoparticles: Experimental and theoretical approach for hydrogen production from dimethyl aminborane and sodium borohydride hydrolysis","authors":"Mehmet Sait Izgi ,&nbsp;Ömer Şahin ,&nbsp;Sultan Faal ,&nbsp;Fatih Ahmet Celik ,&nbsp;Erhan Onat ,&nbsp;Ezman Karabulut","doi":"10.1016/j.fuel.2025.135412","DOIUrl":"10.1016/j.fuel.2025.135412","url":null,"abstract":"<div><div>In this study, four different catalysts (Ni(0), Ni@Urea, Ni@DOT, Ni@MOF-DOT) were synthesized. The first two of these were synthesized by the impregnation method, while the last two were obtained using the hydrothermal method. Hydrogen (H₂) efficiency of catalyses were investigated by hydrolysing sodium borohydride (SBH) and dimethylamine borane (DMAB) hydrogen sources. The HGR values ​​obtained for SBH and DMAB hydrolysis of the best catalysis Ni@MOF-DOT were determined to be 1423 and 642 (mL/min.g.cat), and the TOF values ​​were determined to be 191/hour and 78.6/hour, respectively. Transmission Electron Microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDS), nitrogen adsorption/desorption, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Inductively coupled plasma optical emission spectroscopy (ICP-OES) and X-ray photoelectron spectroscopy (XPS) analyses were used for the characterization study of Ni@CQDs nano-catalyst. In kinetic analyses driven by Arrhenius and Eyring-Polanyi equations, the catalyst in the hydrolysing of DMAB has lower activation parameters while the catalysts have showed stability over six reusability cycles in both hydrogen sources. Also, the average particle size of the (Ni@DOT-MOF) nano catalyst is about 4.6 nm and the presence of Carbon (C), oxygen (O), nitrogen (N) and Ni (Ni) atoms in its structure is confirmed by XPS and ICP analyses. The high density of 2P_1/2 and 2P_3/2 spin states of Ni atoms in the Ni@MOF-DOT catalyst creates Lewis acid regions that increase the catalytic activity. The experimental results were supported by Molecular Dynamics (MD) findings based on extended tight-binding density functional theory (GFN1-xTB).</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135412"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced electrocatalytic hydrogen evolution over a two-dimensional Ti3C2 MXene/FDU-12 templated-nanoporous NiO-decorated carbon paste electrode","authors":"Grandprix T.M. Kadja ,&nbsp;Aninda F. Nuraini ,&nbsp;Ria S. Rahayu ,&nbsp;Agam Pamungkas ,&nbsp;Ferry Iskandar ,&nbsp;Munawar Khalil ,&nbsp;Triati D.K. Wungu ,&nbsp;Qingjun Yu ,&nbsp;Xiaolong Tang ,&nbsp;Honghong Yi ,&nbsp;Muhammad H. Mahyuddin ,&nbsp;Dewi Agustiningsih","doi":"10.1016/j.fuel.2025.135305","DOIUrl":"10.1016/j.fuel.2025.135305","url":null,"abstract":"<div><div>Noble metal-free electrocatalysts have become a crucial component for efficient hyrogen production through the electrochemical hydrogen evolution reaction (HER). Notably, MXene, a unique two-dimensional (2D) transition metal carbide/nitride material,<!--> <!-->has shown several advantageous properties such as, excellent conductivity, stability, and high surface area, which are promising as electrocatalyst for HER, especially in the alkaline electrolytes. Herein, we design an Ti₃C₂ MXene electrocatalyst decorated by the nanoporous nickel(II) oxide (NiO) on the carbon-paste electrode (CPE), coded as CPE-MXene/<em>n</em>-NiO. The electrochemical HER evaluation demonstrates that CPE-MXene/<em>n</em>-NiO has the best performance with an overpotential of 233 mV at a current density of 10 mA cm⁻². Other electrodes, bare CPE, CPE-MXene, and CPE-<em>n</em>-NiO shows lower overpotentials of 630 mV, 415 mV, and 396 mV, respectively, at the same current density. Moreover, CPE-MXene/<em>n</em>-NiO also displays the lowest Tafel slope (24 mV dec⁻¹) with a stable performance after 1000 cycles. The unique combination of MXene’s layered structures with nanoporosity of <em>n</em>-NiO provides seamless difussion, whereas the highly electroconductive properties of MXene are beneficial for fast charge transfer. In addition, the density functional theory (DFT)-based calculations indicate that the balance between H* adsorption and desorption is most optimized at the interface of MXene and NiO, which substantially enhances the hydrogen evolution reaction.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135305"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of anti-oxidative and efficient Ni2Si/SiC/C-based microwave absorption composite by recycling coal hydrogasification residue","authors":"Xiaojie Xue ,&nbsp;Liping Liang ,&nbsp;Xueqin Liu ,&nbsp;Kun Jia ,&nbsp;Kewei Zhang ,&nbsp;Guomin Li","doi":"10.1016/j.fuel.2025.135432","DOIUrl":"10.1016/j.fuel.2025.135432","url":null,"abstract":"<div><div>With the growing demand for advanced microwave absorption (MA) materials in harsh application environments, there is an urgent need to develop efficient absorbent with exceptional high-temperature oxidation resistance. Herein, we successfully fabricated novel Ni₂Si/SiC/C composites with remarkable thermal stability through a combined sol–gel embedding method and high-temperature solid-phase reaction strategy, using coal hydrogasification residue as the carbon matrix. The as-prepared Ni₂Si/SiC/C composite features a unique microstructure comprising a porous carbon skeleton decorated with SiC nanoparticles and spherical Ni₂Si coatings. By precisely tuning the stoichiometric ratios of silicon, carbon, and nickel precursors in the fabrication process, the optimized samples demonstrated outstanding MA performance at room temperature. Notably, 15Ni-SiC/C-5.0 achieved a minimum reflection loss (<em>RL</em>_min) of −31.18 dB with a maximum effective absorption bandwidth (EAB_max) of 4.0 GHz at a thin matching thickness of only 1.5 mm. Meanwhile, 20Ni-SiC/C-5.0 exhibited an even deeper <em>RL</em>_min of −37.30 dB at 5.5 mm, with an impressive broadband EAB covering 14.64 GHz across the entire tested thickness range (1.0–5.5 mm). Remarkably, after undergoing calcination at 600 °C in air for 2 h, the two samples maintained excellent MA performance, with <em>RL</em>_min values of −42.53 dB and −30.72 dB at 4.0 mm, respectively, demonstrating their superior high-temperature thermal stability. Further investigation revealed that the outstanding MA performance stem from an optimal combination of impedance matching, conductive loss, and polarization loss mechanisms, all of which are closely related to the composite’s microstructure. This work not only presents a high-performance, oxidation-resistant carbon-based microwave absorbent but also provides valuable insights for the future development of advanced anti-oxidative microwave absorbents.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"397 ","pages":"Article 135432"},"PeriodicalIF":6.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}