Fuel Processing Technology最新文献_第7页

Biomass char gasification for hydrogen production: A thermodynamic equilibrium analysis 生物质炭气化制氢：热力学平衡分析

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-07-06 DOI: 10.1016/j.fuproc.2025.108279

Shaolin Liu, Amine Ben-Abdelwahed, Cécile Gaborieau, Jean Lachaud

{"title":"Biomass char gasification for hydrogen production: A thermodynamic equilibrium analysis","authors":"Shaolin Liu, Amine Ben-Abdelwahed, Cécile Gaborieau, Jean Lachaud","doi":"10.1016/j.fuproc.2025.108279","DOIUrl":"10.1016/j.fuproc.2025.108279","url":null,"abstract":"<div><div>Hydrogen can be produced from biomass via thermochemical conversion, either through direct gasification of raw biomass or a two-step process involving pyrolysis to generate char, followed by char gasification. The latter process reduces tar contamination in syngas and improves gasification efficiency. Chemical equilibrium modeling of char gasification provides valuable estimates of ideal operating conditions, serving as an effective tool for gasifier design and optimization. The analysis focuses on the effects of process parameters on hydrogen yield and efficiency, as well as the determination of optimal thermodynamic conditions for hydrogen production. The chemical composition of wood char at different pyrolysis temperatures was examined using literature data. Char gasification in steam was predicted using Gibbs energy minimization, identifying up to 122 product species. The optimal conditions were identified within a temperature range of 900–1300 °C and a steam-to-char molar ratio (<span><math><mi>m</mi></math></span>) of 0.6–0.9, yielding a hydrogen molar fraction of 0.53 ± 0.01. Under these conditions, the primary gases produced were <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> (0.53) and <span><math><mi>CO</mi></math></span> (0.45). Further optimization of process efficiency suggested that setting the gasification temperature to 800 °C and the steam-to-char molar ratio to 1.3 could achieve a hydrogen molar fraction of 0.5 while maintaining a process efficiency of 55%.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108279"},"PeriodicalIF":7.2,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563093","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

Sintering-driven optimization of multi-ionic SDC-Na2CO3 nanocomposite electrolytes for low-temperature solid oxide cell applications 低温固体氧化物电池用多离子SDC-Na2CO3纳米复合电解质烧结驱动优化

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-07-04 DOI: 10.1016/j.fuproc.2025.108284

Maria Carmenza Diaz Lacharme , Andrea Bartoletti , Katia Monzillo , Riccardo Ceccato , Francesco Parrino , Emanuela Callone , Sandra Dirè , Vincenzo Vaiano , Alessandra Sanson , Angela Gondolini , Alessandro Donazzi

{"title":"Sintering-driven optimization of multi-ionic SDC-Na2CO3 nanocomposite electrolytes for low-temperature solid oxide cell applications","authors":"Maria Carmenza Diaz Lacharme , Andrea Bartoletti , Katia Monzillo , Riccardo Ceccato , Francesco Parrino , Emanuela Callone , Sandra Dirè , Vincenzo Vaiano , Alessandra Sanson , Angela Gondolini , Alessandro Donazzi","doi":"10.1016/j.fuproc.2025.108284","DOIUrl":"10.1016/j.fuproc.2025.108284","url":null,"abstract":"<div><div>Composite electrolytes based on samarium-doped ceria (SDC) and sodium carbonate were synthesized via a single-step coprecipitation method and evaluated for low-temperature solid oxide cell (SOC) applications. The impact of sintering temperature on phase composition, microstructure, conductivity, and stability was systematically studied. X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and solid state nuclear magnetic resonance analyses revealed strong interfacial interactions between SDC and Na<sub>2</sub>CO<sub>3</sub>. Electrochemical impedance spectroscopy in air and 4 % H<sub>2</sub> atmospheres demonstrated multi-ionic conduction with dominant protonic transport under dry reducing conditions. Conductivity values above 20 mS/cm at 600 °C were achieved in samples sintered at 700 °C, although these exhibited significant decay under 72 h exposure to a humidified atmosphere. Samples sintered at 850 and 900 °C showed improved densification (up to 97 %), allowing proton conduction to follow the same hydration-based transport mechanism observed in conventional perovskite proton conductors, independent of the surrounding gas composition. Open-circuit voltage experiments conducted at 600 °C on highly dense pellets revealed values close to the theoretical Nernst potential, confirming gas tightness and low electronic leakage compared to the pure SDC phase. These findings demonstrate that the SDC-Na<sub>2</sub>CO<sub>3</sub> nanocomposite offers promising transport properties for SOC applications, with trade-offs between conductivity and stability driven by sintering-induced microstructural changes.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108284"},"PeriodicalIF":7.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563585","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

Torrefaction of spent coffee grounds for solid fuel production: A review 废咖啡渣焙烧制备固体燃料的研究进展

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-07-03 DOI: 10.1016/j.fuproc.2025.108280

Bassazin Ayalew Mekonnen , Solomon Workneh Fanta , Johan De Greef , Jo Van Caneghem , Maarten Vanierschot

{"title":"Torrefaction of spent coffee grounds for solid fuel production: A review","authors":"Bassazin Ayalew Mekonnen , Solomon Workneh Fanta , Johan De Greef , Jo Van Caneghem , Maarten Vanierschot","doi":"10.1016/j.fuproc.2025.108280","DOIUrl":"10.1016/j.fuproc.2025.108280","url":null,"abstract":"<div><div>Lignocellulosic solid fuels derived from biomass are emerging as a promising alternative to fossil fuels. However, due to a high moisture content, low energy density, and bulky volume, biomass is less favorable in terms of transport, storage, handling, and conversion. Pretreatment of biomass has shown to address these limitations, improving the efficiency of converting biomass into bioenergy. Among various methods, torrefaction is particularly promising, as it produces solid biogenic fuels that show a relatively higher conversion rate into bioenergy (on an equal mass basis) compared to the original biomass from which they are derived. This paper provides a comprehensive review of the state-of-the-art in torrefaction and its role in thermochemical conversion processes. Particularly, the characteristics of spent coffee grounds (SCGs) are examined, together with the potential of torrefaction for solid biofuel production from SCGs. Reactor technologies that may be used for this purpose are explored and the impact of process parameters and operating conditions is discussed. To gain deeper understanding of the reactions and mass & heat transfer phenomena involved in torrefaction, commonly applied reaction kinetics and previously established Computational Fluid Dynamics (CFD) models are reviewed. Challenges associated with scaling up methods for industrial applications and future perspectives of torrefaction in bioenergy production are also discussed. Finally, conclusions are drawn and research needs for further improvement of the torrefaction process are highlighted.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108280"},"PeriodicalIF":7.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535658","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

Ecofriendly and cost-effective biodiesel production from water containing feedstocks through electrolysis- a review 电解含原料水生产生物柴油的研究进展

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-06-27 DOI: 10.1016/j.fuproc.2025.108277

Balaji Panchal, Chia-Hung Su, Chun-Chong Fu, Shao-Jung Wu, Horng-Yi Juan

{"title":"Ecofriendly and cost-effective biodiesel production from water containing feedstocks through electrolysis- a review","authors":"Balaji Panchal, Chia-Hung Su, Chun-Chong Fu, Shao-Jung Wu, Horng-Yi Juan","doi":"10.1016/j.fuproc.2025.108277","DOIUrl":"10.1016/j.fuproc.2025.108277","url":null,"abstract":"<div><div>Biodiesel has the potential to significantly contribute to the elimination of the current global energy and climate change challenges. However, its production and commercialization have been hindered by the diverse nature of feedstocks, and production techniques. This comparative review evaluates the production of biodiesel by electrolysis method with other methods such as (trans)esterification, supercritical transesterification, emulsion or micro-emulsion, and thermal cracking or pyrolysis, microwave-assited transesterification, and photocatalysis in terms of their environmental impact and commercial feasibility. Also, this study focuses on the availability of different biodiesel feedstocks and summarizes their characteristics affect biodiesel properties. It also outlines the criteria for selecting feedstocks for sustainable and low-cost biodiesel production. Waste cooking oil based third-generation feedstocks have been shown to be superior in comparison. Among all biodiesel production processes, electrolysis is the most suitable because it is an eco-friendly method with properties comparable to diesel. Recent research provides an update on the current challenges and opportunities for biodiesel commercialization, taking into account techno-economic and environmental considerations. The review concludes with future perspectives and suggestions regarding the selection criteria of feedstocks and production techniques to make biodiesel production cost-effective, efficient, and environmentally friendly.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108277"},"PeriodicalIF":7.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501025","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

Combustion characterization of benzene-doped, hydrogen-rich coke oven gas surrogate mixtures: H2/CH4/CO/N2/CO2 掺苯富氢焦炉气体H2/CH4/CO/N2/CO2替代混合物的燃烧特性

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-06-26 DOI: 10.1016/j.fuproc.2025.108241

Marianna Cafiero , M. Mustafa Kamal , Saurabh Sharma , Phuc Danh Nguyen , Milena Nowakowska , Axel Coussement , Alessandro Parente

{"title":"Combustion characterization of benzene-doped, hydrogen-rich coke oven gas surrogate mixtures: H2/CH4/CO/N2/CO2","authors":"Marianna Cafiero , M. Mustafa Kamal , Saurabh Sharma , Phuc Danh Nguyen , Milena Nowakowska , Axel Coussement , Alessandro Parente","doi":"10.1016/j.fuproc.2025.108241","DOIUrl":"10.1016/j.fuproc.2025.108241","url":null,"abstract":"<div><div>This experimental study investigates the effects of benzene doping on the combustion and emission characteristics of hydrogen-rich, coke oven gas (COG) surrogate mixture, H<sub>2</sub>/CH<sub>4</sub>/CO/N<sub>2</sub>/CO<sub>2</sub>, to be called hereafter as COGb to distinguish it from and compare it with a different coke oven surrogate mixture, H<sub>2</sub>/CH<sub>4</sub>/CO, to be called hereafter as COGa. Unlike COGa mixture that includes only the major components of the industrial-grade coke oven gas composition, COGb also considers the minor components for the sake of a comprehensive understanding of the chemical and physical phenomena occurring at an industrial scale when burning coke oven gas mixtures. The purpose of benzene (C<sub>6</sub>H<sub>6</sub>) – as representative of benzol (BTX) – doping of the COG mixtures is to investigate the direct and indirect impact of aromatic compounds on NO<sub>x</sub> formation during the hydrogen-rich combustion process. Different levels of benzene (C<sub>6</sub>H<sub>6</sub>) doping (up to 5 % v/v) of industrial-grade, H<sub>2</sub>-rich COGb flames in a semi-industrial scale furnace under varying stoichiometric conditions allowed for collecting extensive data on temperature, exhaust emission, and chemiluminescence signature of important chemical radical species including OH<sup>⁎</sup> and CH<sup>⁎</sup>. The results highlight a benzene-driven, three-way interaction between flame temperature, NO formation, and soot inception in the coke oven gas flames.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108241"},"PeriodicalIF":7.2,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480539","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

Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms 气化对捣固焦和顶充焦原位热强度的影响：孔隙结构、碳结构和断裂机制

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-06-26 DOI: 10.1016/j.fuproc.2025.108281

Wei Wang , Bowen Chen , Xuheng Chen , Jie Wang , Hui Tang , Changyu Li , Kui Zheng , Runsheng Xu

{"title":"Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms","authors":"Wei Wang , Bowen Chen , Xuheng Chen , Jie Wang , Hui Tang , Changyu Li , Kui Zheng , Runsheng Xu","doi":"10.1016/j.fuproc.2025.108281","DOIUrl":"10.1016/j.fuproc.2025.108281","url":null,"abstract":"<div><div>Tamping coking technology has garnered attention in the ironmaking industry due to its resource efficiency and economic benefits. However, its adaptability under blast furnace conditions remains controversial, limiting its widespread application. Previous studies on tamping coke primarily focused on its cold mechanical strength, reactivity, and post-reaction strength, yet the degradation mechanisms of its in-situ thermal strength after gasification and its performance differences compared to top-charging coke under identical conditions remain underexplored. This study simulates blast furnace temperature and atmosphere to compare the thermal tensile strength of gasified tamping coke and top-charging coke via splitting tests. Results indicate that the strength of top-charging coke sharply declines at 1200 °C, while tamping coke retains 51.3 % higher strength. Gasification enhances coke anisotropy and disrupts pore structures, the latter being the primary factor for strength reduction. Fracture analysis reveals two failure modes: brittle overload fracture and defect-induced fracture, with the latter being more prevalent. Tamping coke exhibits fewer structural defects and milder gasification-induced damage, contributing to its superior thermal strength. This study provides new insights for evaluating coke performance under practical blast furnace conditions and supports the industrial adoption of tamping coke.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108281"},"PeriodicalIF":7.2,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491543","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

Solubility and combustion characterization of methanol/jet A-1 blends enhanced with n-octanol and diethyl ether in lean prevaporized premixed burner 正辛醇和乙醚增强甲醇/喷射A-1共混物在稀预混燃烧器中的溶解度和燃烧特性

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-06-26 DOI: 10.1016/j.fuproc.2025.108278

Ahmed I. EL-Seesy , Ahmed S. Attia , Radwan M. EL-Zohairy , Mohamed I. Hassan Ali

{"title":"Solubility and combustion characterization of methanol/jet A-1 blends enhanced with n-octanol and diethyl ether in lean prevaporized premixed burner","authors":"Ahmed I. EL-Seesy , Ahmed S. Attia , Radwan M. EL-Zohairy , Mohamed I. Hassan Ali","doi":"10.1016/j.fuproc.2025.108278","DOIUrl":"10.1016/j.fuproc.2025.108278","url":null,"abstract":"<div><div>This study investigates the stability of mixtures and combustion characteristics of methanol and hydrous methanol blended with Jet A-1 fuel, utilizing n-octanol and diethyl ether (DEE) as co-solvents and ignition boosters in a lean premixed prevaporized (LPP) combustion system. Phase stability studies were performed at ambient temperatures of 10, 20, and 30 °C, revealing that n-octanol efficiently stabilized methanol–Jet A-1 mixtures. The temperature of 30 °C achieved excellent miscibility. Two blends, namely JMOD1 (80 % Jet A-1 + 5 % Methanol+10 % octanol+5 % DEE volume fraction) and JMOD2 (75 % Jet A-1 + 10 % Methanol+10 % octanol+5 % DEE), were subsequently assessed in the LPP combustor alongside pure Jet A-1 (J100) as a reference fuel. The results indicated that JMOD mixes demonstrated more consistent flame patterns, lower peak temperatures, and diminished wall hot spots in comparison to J100. This enhancement is attributable to the elevated oxygen content in methanol, diethyl ether, and n-octanol, which exhibits flame-stabilizing properties. JMOD blends demonstrated a significant capacity to diminish flame peak temperatures and improve combustion uniformity. The results endorse the viability of methanol blends as an alternative fuel for gas turbine applications.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108278"},"PeriodicalIF":7.2,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481154","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

Systematic optimization of the Ni-to-Mo ratio in bimetallic Ni–Mo₂C catalysts for efficient selective hydrogenation of levulinic acid to γ-valerolactone 双金属Ni-Mo₂C催化剂中Ni-Mo比的系统优化，用于乙酰丙酸高效选择性加氢制备γ-戊内酯

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-06-25 DOI: 10.1016/j.fuproc.2025.108276

Ravichanon Sakdee , Sakhon Ratchahat , Chularat Sakdaronnarong , Wanida Koo-amornpattana , Wanwisa Limphirat , Sompin Mahakot , Suttichai Assabumrungrat , Atthapon Srifa

{"title":"Systematic optimization of the Ni-to-Mo ratio in bimetallic Ni–Mo₂C catalysts for efficient selective hydrogenation of levulinic acid to γ-valerolactone","authors":"Ravichanon Sakdee , Sakhon Ratchahat , Chularat Sakdaronnarong , Wanida Koo-amornpattana , Wanwisa Limphirat , Sompin Mahakot , Suttichai Assabumrungrat , Atthapon Srifa","doi":"10.1016/j.fuproc.2025.108276","DOIUrl":"10.1016/j.fuproc.2025.108276","url":null,"abstract":"<div><div>In this investigation, the optimization of Ni-to-Mo ratios in synergistic bimetallic Ni–Mo₂C catalysts was systematically investigated through a co-impregnation method, followed by the transformation of the calcined precursors into carbide structures via a carbothermal reduction process. The catalytic performance was evaluated for the hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL). Comprehensive physical and structural characterizations were carried out to elucidate the structure–activity relationships. In the designed Ni<sub><em>x</em></sub>Mo<sub><em>y</em></sub>C catalysts, a Ni to Mo ratio of 1.0: 1.0, corresponding to the Ni<sub>1.0</sub>Mo<sub>1.0</sub>C catalyst, exhibited the highest activity for hydrogenating LA into GVL. The superior performance of the Ni<sub>1.0</sub>Mo<sub>1.0</sub>C catalyst is attributed to the synergistic interfacial electronic interactions between the metallic Ni<sup>0</sup> and Mo<sub>2</sub>C species, along with the presence of well-ordered carbon layer structures. Under optimized reaction conditions (160 °C, 20 bar H₂ pressure, 8 h reaction time, and 20 wt% catalyst loading), the Ni<sub>1.0</sub>Mo<sub>1.0</sub>C catalyst achieved complete LA conversion and a GVL yield of 97.4 %. This high performance is attributed to its small particle size, improved H<sub>2</sub> adsorption–desorption capacity, and the presence of appropriately distributed acidic sites. These findings highlight the competitive performance of Ni–Mo₂C catalysts for the efficient production of GVL from LA, offering promising applications in sustainable biorefinery processes.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108276"},"PeriodicalIF":7.2,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470719","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

Impact of hydrothermal treatment and activation atmosphere on the porosity development of activated carbon from date pits 水热处理和活化气氛对枣坑活性炭孔隙度发育的影响

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-06-25 DOI: 10.1016/j.fuproc.2025.108264

Gema Gil-Muñoz, Sarra Benguella, Juan Alcañiz-Monge

{"title":"Impact of hydrothermal treatment and activation atmosphere on the porosity development of activated carbon from date pits","authors":"Gema Gil-Muñoz, Sarra Benguella, Juan Alcañiz-Monge","doi":"10.1016/j.fuproc.2025.108264","DOIUrl":"10.1016/j.fuproc.2025.108264","url":null,"abstract":"<div><div>This study explores the production activated carbon from date pits without the use of chemical additives, employing steam and CO<sub>2</sub> as activating agents in accordance with green chemistry principles. A novel activation approach is introduced, integrating both agents to enhance porosity development. The study systematically examines the differences in microporosity formation between CO₂ and steam activation, as well as the influence of hydrothermal pretreatment on the final material properties. Activated carbons with high BET surface areas and distinct pore size distributions were synthesized, including predominantly microporous, materials with both micropores and substantial mesopores, and samples exhibiting a pore network comprising micro-, meso- and macropores. The results demonstrate that hydrothermal pretreatment enhances biochar yield increasing it by approximately 25 %. The evolution of the burn-off was found to be dependent on the pretreatment conditions, carbonization temperature, and the activating agent. Notably, the findings suggest that hydrothermal pretreatment influences biochar reactivity in different ways. Despite the similar surface functional group compositions observed in treated and untreated carbons, hydrothermally treated samples unexpectedly exhibited greater hydrophobicity. Additionally, the combined use of CO₂ and steam agents led to a higher burn-off compared to their individual, highlighting a synergistic effect in the activation process.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108264"},"PeriodicalIF":7.2,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470714","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

Understanding the deposition mechanism burning Fe - rich Zhundong coal in a 0.4 MW pilot-scale facility 了解在0.4 MW中试装置上燃烧富铁准东煤的沉积机理

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-06-24 DOI: 10.1016/j.fuproc.2025.108273

Yongqiang Tian , Xiang He , Weizhi Lv , Dafu Ma , Xu Zhao

{"title":"Understanding the deposition mechanism burning Fe - rich Zhundong coal in a 0.4 MW pilot-scale facility","authors":"Yongqiang Tian , Xiang He , Weizhi Lv , Dafu Ma , Xu Zhao","doi":"10.1016/j.fuproc.2025.108273","DOIUrl":"10.1016/j.fuproc.2025.108273","url":null,"abstract":"<div><div>This study presents a comprehensive investigation of slagging characteristics associated with Fe-rich Zhundong coal (ZDC) combustion utilizing a 0.4 MWth pilot-scale facility. Slag specimens collected from three critical locations - bottom-of-furnace (BOF), superheater, and reheater zones - were systematically characterized through multi-analytical approaches including X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS), complemented by molecular dynamics simulations to elucidate microscopic deposition mechanisms. Key findings reveal that: Distinct melting phenomena were observed across all sampling locations under flue gas temperatures (FGT) ranging from 1000 to 1350 °C, primarily attributed to both the formation of Si<img>Ca low-temperature eutectic phases and fluxing effects of Fe-bearing material. Comparative analysis identified sulfate-induced contamination in reheater deposits at moderate-to-low FGT regimes (1000–1200 °C), demonstrating deposition characteristics analogous to Ca-rich ZDC slag formations. The interaction mechanisms of sulfur in reheater zones promoted Fe<img>Na synergistic effects. The slag produced through low-temperature ashing exhibits lower fusion temperatures. Molecular dynamics simulations further confirmed that elevated combustion temperatures facilitate Si<img>Ca eutectic formation while promoting preferential deposition of Na<sub>2</sub>SO<sub>4</sub>/ CaSO<sub>4</sub> on low-temperature heat exchange surfaces. When using Fe-rich ZDC in the ∏-type boiler, the FGT at the furnace outlet needs to be reduced to at least 1000 °C.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"276 ","pages":"Article 108273"},"PeriodicalIF":7.2,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470864","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