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The effect of potassium mineral transformation on ash fusion characteristics during co-gasification of straw biomass and high-silica-alumina coal 钾矿物转化对秸秆生物质与高硅铝煤共气化过程中灰熔融特性的影响
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-03 DOI: 10.1016/j.fuel.2026.138604
Jinzhe Li, Xia Liu, Xueli Chen, Qinghua Guo, Guangsuo Yu
{"title":"The effect of potassium mineral transformation on ash fusion characteristics during co-gasification of straw biomass and high-silica-alumina coal","authors":"Jinzhe Li,&nbsp;Xia Liu,&nbsp;Xueli Chen,&nbsp;Qinghua Guo,&nbsp;Guangsuo Yu","doi":"10.1016/j.fuel.2026.138604","DOIUrl":"10.1016/j.fuel.2026.138604","url":null,"abstract":"<div><div>Co-gasification of biomass and high-silica-alumina coal not only enhances the gasification reactivity but also mitigates some of the ash-related problems induced by potassium in biomass. However, the influence of potassium mineral transformation on the fusion characteristics of high-silica-alumina ash systems remains poorly investigated. In this study, corn stalk ash (CSA) and synthetic ash (SA, containing only silicon and potassium oxides) were blended with high-silica-alumina Shanxi coal ash (SXCA), while the ash fusion temperature analyzer and high-temperature heating stage coupled with optical microscope (HSOM) were respectively utilized to investigate the fusion properties of the mixed ash. In addition, X-ray diffraction (XRD) and FactSage thermodynamics software were used to explore the mechanism of potassium in changing the fusion characteristics. The results show that the addition of both CSA and SA could reduce the fusion temperatures by promoting the conversion of mullite to orthoclase at low blending ratios. However, when the mass ratio of SiO<sub>2</sub>/K<sub>2</sub>O was lower than 5.55, the transformation of orthoclase into refractory leucite. For higher blending ratios (&gt;80%), the aluminum in the ash became insufficient to fully react with potassium, leading to the presence of excess potassium as K<sub>2</sub>O in the liquid slag, which significantly reduced the fusion temperatures. Therefore, when using straw biomass to regulate the ash fusion characteristics of high-silica-alumina coal, the mass ratio of SiO<sub>2</sub>/K<sub>2</sub>O should be higher than 5.55. In addition, alkaline earth metals in CSA did not influence the form of potassium, but mitigated the influence of potassium minerals on ash fusion characteristics.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138604"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102746","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}
引用次数: 0
Suppression characteristics and mechanisms of five typical powder suppressants in large-scale enclosed spaces for hydrogen-blended natural gas/air explosions 5种典型粉状灭火剂在大型密闭空间对氢气混合天然气/空气爆炸的抑制特性及机理
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-04 DOI: 10.1016/j.fuel.2026.138529
Kaiyuan Zhao, Xueqing Wan, Zhenyi Liu, Shuhong Li, Mingzhi Li, Qiqi Liu, Jianbo Ma, Chenze Xu, Tao Wang
{"title":"Suppression characteristics and mechanisms of five typical powder suppressants in large-scale enclosed spaces for hydrogen-blended natural gas/air explosions","authors":"Kaiyuan Zhao,&nbsp;Xueqing Wan,&nbsp;Zhenyi Liu,&nbsp;Shuhong Li,&nbsp;Mingzhi Li,&nbsp;Qiqi Liu,&nbsp;Jianbo Ma,&nbsp;Chenze Xu,&nbsp;Tao Wang","doi":"10.1016/j.fuel.2026.138529","DOIUrl":"10.1016/j.fuel.2026.138529","url":null,"abstract":"<div><div>The injection of a certain amount of hydrogen into natural gas pipelines has been proven as an efficient hydrogen transportation solution. Numerous valve chambers are generally used in pipeline transportation systems, and leaks or explosions of CH<sub>4</sub>/H<sub>2</sub> mixtures in these valve chambers can have extremely severe consequences. Therefore, it is important to study the explosion suppression characteristics of common suppression materials for CH<sub>4</sub>/H<sub>2</sub> mixtures in large-scale enclosed spaces. In the present study, a 2 m<sup>3</sup> explosion suppression experimental platform was designed to conduct CH<sub>4</sub>/H<sub>2</sub> explosion suppression experiments using five types of pure powder materials: silica (SiO<sub>2</sub>), zeolite, calcium carbonate (CaCO<sub>3</sub>), ammonium di-hydrogen phosphate (NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub>), and sodium bicarbonate (NaHCO<sub>3</sub>). It was found that SiO<sub>2</sub> and zeolite had almost no suppression effect on CH<sub>4</sub>/H<sub>2</sub> explosions in the large-scale enclosed space, whereas NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> and NaHCO<sub>3</sub> both exhibited significant suppression effects. CaCO<sub>3</sub> had no prominent suppression effect on the explosion pressure of CH<sub>4</sub>/H<sub>2</sub>; however, it yielded a certain suppression effect on explosion temperature. The suppression effectiveness of NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> and NaHCO<sub>3</sub> was maximized at their optimal concentrations. Furthermore, the inhibition mechanisms of these experimental materials were analyzed from four aspects: thermal insulation, cooling, dilution, and interruption of chain reactions. It was observed that the CH<sub>4</sub>/H<sub>2</sub> explosion suppression behaviors of the selected inhibitors in the large-scale enclosed space was more complex compared to those in a small-scale space. Some inhibitors exhibited different explosion suppression characteristics from those reported in previous research. The findings of this work provide important guidance for CH<sub>4</sub>/H<sub>2</sub> explosion suppression in industrial enclosed spaces and also offer new insights into the selection and modification of inhibitors.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138529"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186739","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}
引用次数: 0
Surface Tension, Thermal, and Rheological behaviors of Oleic acid-modified MoS2/Hydraulic oil nanofluids 油酸改性MoS2/液压油纳米流体的表面张力、热和流变行为
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-05 DOI: 10.1016/j.fuel.2026.138617
Hadi Pourpasha , Yaghoub Mohammadfam , Jie Yang , Saeed Zeinali Heris , Patrice Estellé
{"title":"Surface Tension, Thermal, and Rheological behaviors of Oleic acid-modified MoS2/Hydraulic oil nanofluids","authors":"Hadi Pourpasha ,&nbsp;Yaghoub Mohammadfam ,&nbsp;Jie Yang ,&nbsp;Saeed Zeinali Heris ,&nbsp;Patrice Estellé","doi":"10.1016/j.fuel.2026.138617","DOIUrl":"10.1016/j.fuel.2026.138617","url":null,"abstract":"<div><div>The main challenge for nanofluids (NFs) is achieving and maintaining the long-term stable dispersion of nanoparticles within the hydraulic oil base stock. This study investigates the synthesis, characterization, stability, and performance evaluation of hydraulic oil-based NFs containing oleic acid-modified MoS<sub>2</sub> (OA-MoS<sub>2</sub>) nanoparticles (NPs). Stable NFs were prepared by dispersing OA-MoS<sub>2</sub> NPs in ISO 46 hydraulic oil at concentrations of 0.02–0.08 wt%. Comprehensive characterization via XRD, XPS, TGA, BET, SEM, EDX, and zeta potential analysis confirmed successful surface modification, enhanced crystallinity, and excellent colloidal stability. Rheological assessments revealed shear-thinning behavior across all concentrations, with optimal viscosity reduction observed at 0.04 wt%. The viscosity index improved significantly at higher nanoparticle loadings, indicating enhanced thermal stability. Thermal conductivity increased by up to 41.8% at 50°C, while surface tension decreased non-monotonically, with a minimum at 0.06 wt%. Flash point and pour point were enhanced by 4.76% and 20%, respectively. The results demonstrate that OA-modified NFs offer improved thermophysical and rheological properties, making them promising candidates for high-performance hydraulic fluids with superior lubrication, thermal management, and energy efficiency.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138617"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186702","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}
引用次数: 0
Molecular dynamics guided design of a dual-functional viscosity reducer to break asphaltene aggregates in heavy oil 分子动力学指导了一种双功能降粘剂的设计,以破坏重油中的沥青质聚集体
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-05 DOI: 10.1016/j.fuel.2026.138565
Saiyi Song , Xiangyu Chen , Xiaojie Feng , Xiaoxiao Wei , Yinghua Sun , Shuqian Xia
{"title":"Molecular dynamics guided design of a dual-functional viscosity reducer to break asphaltene aggregates in heavy oil","authors":"Saiyi Song ,&nbsp;Xiangyu Chen ,&nbsp;Xiaojie Feng ,&nbsp;Xiaoxiao Wei ,&nbsp;Yinghua Sun ,&nbsp;Shuqian Xia","doi":"10.1016/j.fuel.2026.138565","DOIUrl":"10.1016/j.fuel.2026.138565","url":null,"abstract":"<div><div>The depletion of conventional light oil reserves and the escalating global energy crisis have intensified the strategic imperative to develop unconventional heavy oil resources. However, the efficient extraction and transportation of heavy oil are severely hampered by its inherent high viscosity, primarily caused by elevated contents of asphaltenes. In this work, an oil-soluble polymeric viscosity reducer (MPPMO) was pre-designed using molecular dynamics (MD) simulations and realized by grafting polyethylene glycol monomethyl ether (PGME) onto the PMO backbone to integrate polar functionalities with a long-chain structure. Performance evaluation demonstrated that MPPMO achieves a net viscosity-reduction efficiency of 42.51%, markedly outperforming PMO (35.54%) with a relative improvement of about 20% in high-viscosity crude oil (OIL A, 17951 mPa·s) at 50 °C, while maintaining an exceptional stability over 14 h. Molecular dynamics simulations illustrate that introducing polar groups (–COOH and –O–) enables MPPMO to interact more strongly with asphaltenes than PMO, leading to the breakdown of asphaltene aggregates and viscosity reduction, while the long-chain backbone of MPPMO further inhibits their re-aggregation through steric hindrance. Therefore, these findings support a molecular-design strategy that couples long-chain backbones with multiple polar functional groups to improve the dispersion of asphaltene aggregates and enhance heavy-oil flowability.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138565"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186701","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}
引用次数: 0
ScCO2-driven multiscale porosity evolution in coal: Mineral-coupled reconstruction mechanisms and CO2-ECBM implications 煤中scco2驱动的多尺度孔隙演化:矿物耦合重建机制和CO2-ECBM意义
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-10 DOI: 10.1016/j.fuel.2026.138697
Hengyi He , Peng Liu , Baisheng Nie , Xiao Cui , Jingtao Yang , Hao Zhang , Wanjun Chen , Song Bao
{"title":"ScCO2-driven multiscale porosity evolution in coal: Mineral-coupled reconstruction mechanisms and CO2-ECBM implications","authors":"Hengyi He ,&nbsp;Peng Liu ,&nbsp;Baisheng Nie ,&nbsp;Xiao Cui ,&nbsp;Jingtao Yang ,&nbsp;Hao Zhang ,&nbsp;Wanjun Chen ,&nbsp;Song Bao","doi":"10.1016/j.fuel.2026.138697","DOIUrl":"10.1016/j.fuel.2026.138697","url":null,"abstract":"<div><div>Integrating CO<sub>2</sub> storage with coalbed methane extraction through subsurface injection represents a critical carbon-negative strategy, inherently governed by reactive CO<sub>2</sub>-coal interface dynamics. This study deciphers spatiotemporal evolution mechanisms of pore–mineral synergetic interactions in coal and the consequent mechanical weakening process under supercritical CO<sub>2</sub> (ScCO<sub>2</sub>) through integrated Nuclear magnetic resonance (NMR), Low-pressure N<sub>2</sub> adsorption (LP-N<sub>2</sub>GA), X-ray Diffraction (XRD), Electron probe microanalysis (EPMA) and Nanoindentation. The results show that clear two-stage pore-structure kinetics. In the early “rapid activation” stage (0–4 d), porosity increases from 1.24% to 4.31%, followed by a “dynamic equilibrium” stage (&gt;4 d) in which pore growth slows. The basic hierarchy (micropores &gt; mesopores &gt; macropores) is preserved, but micropores are continuously generated; the average pore size decreases; meso- and macropores show only limited fluctuating growth. Pore reconstruction is governed by selective mineral dissolution, with dolomitic carbonates strongly depleted and quartz–feldspar–pyroxene/epidote silicates relatively enriched. The crossover of apparent carbonate and silicate contents marks a shift from a cement-controlled skeleton to a framework-controlled one on day 3. Fractal analysis indicates gradual smoothing of surface roughness (<em>D<sub>1</sub></em>) and a non-monotonic evolution of pore-network complexity (<em>D</em><sub>2</sub>). Within the 0–2 days the coal response evolves from predominantly elastic to increasingly plastic; surface elastic modulus and hardness decrease by about 48% and 46%, respectively, then tend to stabilize in step with pore and mineral evolution. These findings define a coupled “dissolution–pore opening–elastic–plastic competition” framework and provide a mechanistic basis for optimizing CO<sub>2</sub>-ECBM project.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138697"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186692","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}
引用次数: 0
Green and sustainable Metal–Nitrogen–Carbon (M−N−C) electrocatalysts for oxygen reduction in PEM fuel cells: structure–property relationships and design strategies PEM燃料电池中用于氧还原的绿色可持续金属-氮-碳(M−N−C)电催化剂:结构-性能关系和设计策略
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-10 DOI: 10.1016/j.fuel.2026.138663
Jithul KP, Tinku Sharma, Tamilarasi B, Jay Pandey
{"title":"Green and sustainable Metal–Nitrogen–Carbon (M−N−C) electrocatalysts for oxygen reduction in PEM fuel cells: structure–property relationships and design strategies","authors":"Jithul KP,&nbsp;Tinku Sharma,&nbsp;Tamilarasi B,&nbsp;Jay Pandey","doi":"10.1016/j.fuel.2026.138663","DOIUrl":"10.1016/j.fuel.2026.138663","url":null,"abstract":"<div><div>Proton Exchange Membrane Fuel Cells (PEMFCs) are crucial for sustainable energy, but their widespread adoption needs efficient and affordable electrocatalysts for the oxygen reduction reaction (ORR). While platinum-group metals (PGMs) are the benchmark, their high cost and scarcity drive the search for alternatives. Metal-nitrogen-carbon (M−N−C) catalysts have emerged as frontrunners, significantly narrowing the performance gap with PGMs, especially in alkaline media. This review comprehensively explores the fundamental principles for developing durable, cost-effective M−N−C catalysts with high ORR activity, a critical bottleneck for high specific power in PEMFCs. We delve into essential steps for constructing highly active and stable M−N−C catalysts, focusing on meticulous selection of metal species, templates, and optimized pyrolysis conditions. A significant highlight is the exceptional promise of Fe-doped zeolite imidazole framework (ZIF)-derived catalysts. The review thoroughly discusses the profound impact of coordinated atoms on catalytic activity and stability. We also highlight recent breakthroughs in M−N−C catalyst synthesis, with a keen focus on Single Atom Catalysts (SACs) and emerging Double Atom Catalysts (DACs) for ORR. Finally, we provide an in-depth analysis of M−N−C electrocatalyst degradation mechanisms and effective mitigation strategies, essential for their long-term viability.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138663"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186785","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}
引用次数: 0
Mesoporous CeWTiOx catalysts with a wide active temperature window for NH3–SCR 具有宽活性温度窗NH3-SCR介孔CeWTiOx催化剂
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-10 DOI: 10.1016/j.fuel.2026.138710
Youlin Liu , Shihao Li , Chengdong Ma , Weiwei Yu , Xingwen Xi , Yuesong Shen
{"title":"Mesoporous CeWTiOx catalysts with a wide active temperature window for NH3–SCR","authors":"Youlin Liu ,&nbsp;Shihao Li ,&nbsp;Chengdong Ma ,&nbsp;Weiwei Yu ,&nbsp;Xingwen Xi ,&nbsp;Yuesong Shen","doi":"10.1016/j.fuel.2026.138710","DOIUrl":"10.1016/j.fuel.2026.138710","url":null,"abstract":"<div><div>The development of cerium (Ce)-based catalysts with a wide active temperature window and anti-poisoning ability is one of the challenges for the selective catalytic reduction of NO<sub>x</sub> by NH<sub>3</sub> (NH<sub>3</sub>–SCR). Herein, we fabricate novel mesoporous CeWTiO<sub>x</sub> composites via the solvent evaporation–induced self-assembly method. The optimal Ce<sub>1</sub>W<sub>2</sub>Ti<sub>4</sub>O<sub>x</sub> catalyst delivers remarkable NH<sub>3</sub>–SCR deNO<sub>x</sub> performance with a wide active temperature window (&gt;90 % NO<sub>x</sub> conversion at 195 °C–491 °C) and high N<sub>2</sub> selectivity (&gt;90 % at 200 °C–500 °C). The high amount of active oxygen species and strong interaction between Ce, tungsten (W), and titanium (Ti) are instrumental in broadening the active temperature window of the catalyst. Moreover, low hydrophilicity, mesopores, and strong interaction (Ce, W, and Ti) weaken the adsorption of H<sub>2</sub>O and SO<sub>2</sub>, enhancing the anti-poisoning ability of the catalyst. In situ diffuse reflectance infrared Fourier transform spectroscopy analysis indicates that the NH<sub>3</sub>-SCR reaction process over Ce<sub>1</sub>W<sub>2</sub>Ti<sub>4</sub>O<sub>x</sub> follows both the Langmuir–Hinshelwood and Eley–Rideal mechanisms. This strategy becomes a novel method for preparing efficient catalysts for NH<sub>3</sub>–SCR.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138710"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186801","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}
引用次数: 0
Numerical investigation of co-firing of RDF and pulverized coal in precalciners: Impacts on combustion characteristics and pollutant emissions 预分解炉中RDF与煤粉共烧的数值研究:对燃烧特性和污染物排放的影响
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-03 DOI: 10.1016/j.fuel.2026.138647
Zihui Zhang , Shijun Yan , Meiying Huang , Yuxiang Liu , Yumeng Zhang
{"title":"Numerical investigation of co-firing of RDF and pulverized coal in precalciners: Impacts on combustion characteristics and pollutant emissions","authors":"Zihui Zhang ,&nbsp;Shijun Yan ,&nbsp;Meiying Huang ,&nbsp;Yuxiang Liu ,&nbsp;Yumeng Zhang","doi":"10.1016/j.fuel.2026.138647","DOIUrl":"10.1016/j.fuel.2026.138647","url":null,"abstract":"<div><div>Cement production is a major CO<sub>2</sub> emitter, and co-firing refuse-derived fuel (RDF) can reduce coal use while recovering energy from waste. An experimentally validated CFD model was applied to a full-scale precalciner to evaluate RDF and pulverized coal co-combustion at RDF substitution ratios of 0 ∼ 45% under constant total heat input. Axial profiles of velocity, temperature, major species, fuel burnout, raw-meal decomposition, and pollutant emissions were analyzed. The results show that increasing RDF substitution intensified the internal flow and raised the mean outlet velocity from 24.05 to 29.61 m/s, while slightly decreasing the mean outlet temperature from 1321 to 1216 K. High RDF shares reduced burnout and decomposition, but the temperature field remained sufficiently uniform for calcination. Outlet CO<sub>2</sub> emissions, primarily from coal combustion and CaCO<sub>3</sub> decomposition, decline with RDF blending in a quadratic trend, while NO emissions decrease almost linearly due to the lower nitrogen content of RDF. An RDF substitution ratio of 15% provided the best overall performance, maintaining burnout and decomposition above 95% and 90%, respectively, while reducing outlet CO<sub>2</sub> and NO by 1.69% and 7.06%. These results support the technical feasibility of partial coal replacement by RDF in cement precalciners.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138647"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102658","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}
引用次数: 0
Cross-scale flow experiments and establishment of motion equations for shale oil 页岩油跨尺度流动实验及运动方程的建立
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-03 DOI: 10.1016/j.fuel.2026.138571
Yu XIONG , Aoran LENG , Mingqiu LI , Kai YU , Shasha LI , Feng XIONG
{"title":"Cross-scale flow experiments and establishment of motion equations for shale oil","authors":"Yu XIONG ,&nbsp;Aoran LENG ,&nbsp;Mingqiu LI ,&nbsp;Kai YU ,&nbsp;Shasha LI ,&nbsp;Feng XIONG","doi":"10.1016/j.fuel.2026.138571","DOIUrl":"10.1016/j.fuel.2026.138571","url":null,"abstract":"<div><div>Currently, the equation of motion describing the full-scale flow process does not exist yet. This article establishes a cross-scale transport experiment and data processing method based on the principle of conservation of mass with high precision pressure and quality acquisition system. Through this experiment, transport parameters such as liquid film thickness <em>h</em>, slip length <em>l<sub>s</sub></em>, and fluid viscosity <em>μ</em> can be obtained. The transport parameters obtained at the corresponding scales are fitted with the actual flow velocity through multivariate nonlinear fitting, and the unified form of the motion equation is <em>v</em>=<em>K</em>∇<em>P</em>/μ (A+<em>B</em>∇<span><math><mrow><mi>P</mi></mrow></math></span>). A mainly reflects the influence of pore structure characteristics on driving resistance, while B reflects the influence of absorbing, slip and additional pressure gradient results in no-laminar flow when those pore decreasing to Nano-scale. The average relative error between the predicted flow velocity and the actual flow velocity of this equation at the three scales is 10.582%. Sensitivity analysis was ultimately conducted on key parameters ▽P, r<sub>eff</sub>/r, and φ. The motion equation will help for evolution of new theory and method for tight source energy production. Such as productivity prediction, well test interpretation as well as cross scale numerical simulation.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"417 ","pages":"Article 138571"},"PeriodicalIF":7.5,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102659","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}
引用次数: 0
Fabrication of RuCo bimetallic catalyst enabling efficient hydrogen generation via ammonia borane hydrolysis 能通过氨硼烷水解高效产氢的RuCo双金属催化剂的制备
IF 7.5 1区 工程技术
Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-09 DOI: 10.1016/j.fuel.2026.138655
Xianyun Liu , Lu Zhao , Han Wu , Linyan Bian , Yanping Fan , Baozhong Liu
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