Fuel最新文献

{"title":"Pore structure characterization and permeability prediction with fractal theory considering the tortuosity effect","authors":"Fenghe Liu ,&nbsp;Ming Yang ,&nbsp;Kunyu Wu ,&nbsp;Jie Zong ,&nbsp;Hongming Song ,&nbsp;Fuyong Wang","doi":"10.1016/j.fuel.2025.134978","DOIUrl":"10.1016/j.fuel.2025.134978","url":null,"abstract":"<div><div>The Zaoyuan Oilfield, located in the Huanghua Sag, Bohai Bay Basin, China, exemplifies medium-porosity, medium-permeability reservoirs that are critical to China’s oil and gas production. However, accurately predicting permeability and characterizing pore structures in medium-porosity, medium-permeability reservoirs remain challenging due to the complexity of the pore networks and the significant role tortuosity plays in influencing fluid flow. While numerous tortuosity models are available, their individual impact on permeability predictions and the identification of the most suitable model for achieving accurate results remain unclear. This study integrates high-pressure mercury intrusion (HPMI) data with fractal theory to characterize pore structures and systematically evaluates the influence of tortuosity on permeability. Six fractal models are applied to analyze pore structures, identifying the optimal model for medium-porosity, medium-permeability reservoirs. Simultaneously, six tortuosity models are assessed for their permeability prediction accuracy, enabling the selection of the most effective approach. The results demonstrate that a fractal-based permeability model incorporating tortuosity significantly improves permeability predictions by capturing the multiscale pore characteristics and complex fluid pathways inherent in medium-porosity, medium-permeability reservoirs. Among the evaluated models, the three-dimensional capillary bundle model exhibits the highest correlation between fractal dimensions and permeability, indicating that higher fractal dimensions correlate with lower reservoir quality. Furthermore, integrating the fractal permeability model with the tortuosity-based Archie equation produces the most accurate and reliable permeability predictions. This study provides innovative strategies for characterizing and managing medium-porosity, medium-permeability reservoirs, advancing the understanding of reservoir heterogeneity and offering improved tools for optimizing production and reservoir evaluation.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"394 ","pages":"Article 134978"},"PeriodicalIF":6.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637028","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":"Preparation and electrochemical performance of coal-based composite carbon fibers using water-soluble fraction from lignite by thermal dissolution","authors":"Haojie Liu ,&nbsp;Linjing Hao ,&nbsp;Guoli Zhou ,&nbsp;Daoguang Teng ,&nbsp;Peng Li ,&nbsp;Yijun Cao ,&nbsp;Baolin Xing","doi":"10.1016/j.fuel.2025.135085","DOIUrl":"10.1016/j.fuel.2025.135085","url":null,"abstract":"<div><div>Lignite serves as prefer carbon sources for preparation of composite carbon fibers, as the good reactivity of carbon units and good solubility of reaction products. However, low yield of soluble products from lignite at mild condition and high volatility of toxic organic solvent during spinning are not beneficial for the preparation of coal-based composite carbon fiber. In this work, the sodium hydroxide was introduced to enhance the thermal dissolution of lignite with methanol at mild condition. The water-soluble fraction, separated from the thermal dissolution products, was then mixed with certain amount of polyvinyl alcohol to afford a solution. The solution was treated by electrostatic spinning, pre-oxidation, carbonization, acid washing, and activation, ultimately producing the coal-based composite carbon fibers. In these treatment process, acid washing is beneficial for the removal of surface impurities, resulting an increase in the specific surface area and the exposure of active sites on the surface of the composite carbon fibers. The specific capacitance is enhanced from 73.5 F/g to 197.1 F/g at a current density of 1 A/g. The activated coal-based composite carbon fibers were assembled into a symmetric snap capacitor with an energy density of 8.5 Wh/kg at a power density of 250 W/kg. This work explored a new approach for preparation of coal-based composite carbon fibers by electrostatic spinning in aqueous solution system. It is also a value-added and environmentally friendly pathway of carbon fraction from lignite for preparation of supercapacitor electrode materials.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"394 ","pages":"Article 135085"},"PeriodicalIF":6.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636415","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":"Tandem catalytic process for CO2 methanation using ketonization-derived hydrogen over TiOx","authors":"Mohammad Yazdanpanah ,&nbsp;Mohammad Fereidooni ,&nbsp;Victor Márquez ,&nbsp;Pasit Lakmuang ,&nbsp;Pantita Trongjitraksa ,&nbsp;Rafik Rajjak Shaikh ,&nbsp;Mostafa Tarek ,&nbsp;Krittanun Deekamwong ,&nbsp;Rais Ahmad Khan ,&nbsp;Supareak Praserthdam ,&nbsp;Sanchai Prayoonpokarach ,&nbsp;Piyasan Praserthdam","doi":"10.1016/j.fuel.2025.135082","DOIUrl":"10.1016/j.fuel.2025.135082","url":null,"abstract":"<div><div>Carbon dioxide (CO₂) hydrogenation technology has been identified as a promising strategy to mitigate global warming. However, its practical approach faces significant challenges, one of which is the requirement for an external hydrogen supply. One potential solution involves coupling biomass conversion with CO₂ hydrogenation, utilizing the derived hydrogen (H*) for converting CO₂ into value-added products. Ketonization is one of the effective biomass conversion techniques capable of producing ketones and potentially generating hydrogen through hydrogen abstraction from reactants, as proposed by reaction mechanisms. This study investigated the CO₂ hydrogenation utilizing in-situ generated H* from methyl palmitate ketonization over TiO_x catalysts with varying oxygen vacancies (O_v) levels. The results indicated that Bl.TiO_x, possessing the highest O_v level, exhibited superior ketonization activity (70 % conversion), leading to enhanced H* generation, resulting in production of H₂ (100 µmol.min⁻¹) and CH₄ production (357 µmol.min⁻¹). This enhancement is attributed to O_v in facilitating acid-base pairs formation, thereby promoting blue H₂, CH₄, and palmitone production. Interestingly, CO₂ co-feeding enhanced both CH₄ production to 210 μmol.min⁻¹ via CO₂ methanation and blue H₂ generation to 480 μmol.min⁻¹ through accelerated coke dehydrogenation on Bl.TiO_x catalyst, while having little impact on ketone formation. Another surprising advantage of CO₂ co-feeding was the enhanced stability of the catalyst for the ketonization reaction, potentially attributable to the filling of O_v sites with CO₂. The findings of this study highlighted that co-feeding CO₂ into the ketonization process provides a novel strategy for CO₂ methanation using biomass-derived hydrogen, simultaneously enhancing biofuel production and catalyst stability.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"394 ","pages":"Article 135082"},"PeriodicalIF":6.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637039","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":"Interaction between phosphorus and alkali/alkaline earth metals and their effect on ash transformation thermal kinetics during phosphorus-rich biomass and coal co-gasification","authors":"Chaoyue Zhao ,&nbsp;Yonghui Bai ,&nbsp;Wei Zhao ,&nbsp;Yuchen Li ,&nbsp;Xudong Song ,&nbsp;Jiaofei Wang ,&nbsp;Weiguang Su ,&nbsp;Peng Lv ,&nbsp;Guangsuo Yu ,&nbsp;Min Yao","doi":"10.1016/j.fuel.2025.135088","DOIUrl":"10.1016/j.fuel.2025.135088","url":null,"abstract":"<div><div>Co-gasification of phosphorus-rich biomass with coal enables the clean and efficient conversion of both raw materials, but the interaction between phosphorus and alkali/alkaline earth metals (AAEMs) leads to more complex ash conversion. In this work, the release pattern of alkali metals during gasification of coal, blue-green algae (BG), and mixed raw materials was studied in-situ using a self-designed visual fixed bed and laser-induced breakdown spectroscopy system. Quantitative analysis of phosphorus migration and transformation during co-gasification was performed using inductively coupled plasma emission spectroscopy. Various characterization methods and FactSage were used to investigate interactions between phosphorus and AAEMs in the slag along with their thermal kinetic characteristics during ash transformation. The results showed that coal inhibited the release concentration of potassium from biomass during co-gasification and increased the temperature at which the maximum release concentration of alkali metals occurred, promoting the conversion of non-apatite inorganic phosphorus to apatite inorganic phosphorus in the gasification residue. As the BG content increased, the total and maximum weight loss rate of the mixed ashes during ash conversion gradually decreased, raising the ash fusion temperature of the mixed ashes, and the slag system gradually formed alkaline earth-phosphate minerals from potassium and calcium minerals. And co-gasification of coal and phosphorus-rich biomass effectively alleviates the agglomeration issues caused by coal ash and improves the fouling and slagging problems associated with biomass. This work provided a theoretical basis for understanding the interaction between phosphorus and AAEMs and their influence on the thermodynamics of ash transformation during the co-gasification of coal and phosphorus-rich biomass.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"394 ","pages":"Article 135088"},"PeriodicalIF":6.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637030","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 La0.875Ce0.125CoO3 catalyst for Hg0 removal from low-temperature flue gas: H2O and SO2 resistance performance and mechanism","authors":"Jie Gao,&nbsp;Zijun Ran,&nbsp;Jingyu Ran,&nbsp;Xin Huang,&nbsp;Chuan Ma,&nbsp;Yunlin Shao","doi":"10.1016/j.fuel.2025.135074","DOIUrl":"10.1016/j.fuel.2025.135074","url":null,"abstract":"<div><div>The catalysts utilized for low-temperature catalytic oxidation of Hg⁰ from flue gas typically suffer from issues related to H₂O and SO₂ poisoning. This study focused on doping modification of La_0.875Ce_0.125CoO₃ perovskite with promoters and conducted a thorough investigation on the H₂O and SO₂ resistance through characterization and DFT methods. Experimental results demonstrated that the LCeCO/30 wt% ZrO₂ possessed optimal H₂O and SO₂ resistance. Under high sulfur (1500 ppm SO₂) and high humidity (10 % H₂O(g)) conditions, it maintained approximately 91 % Hg⁰ removal efficiency after thermal regeneration cycles. Characterization results indicated that ZrO₂ doping facilitated the formation of three-dimensional macroporous structure and protected active Co³⁺ sites on the surface. Based on DFT calculations, the H₂O poisoning is attributed to competitive adsorption between H₂O(g) and Hg⁰ on the active sites. Also, the SO₂ poisoning occurs due to competitive adsorption of SO₂ and the toxicity of sulfates to the surface active sites. Meanwhile, ZrO₂ doping can lower the adsorption energies of H₂O(g) and SO₂ by modifying their adsorption configuration, thus weakening the competitive adsorption of H₂O(g) and SO₂ with Hg⁰. Overall, LCeCO/ZrO₂ is a promising Hg⁰ removal catalyst with superior H₂O and SO₂ resistance.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"394 ","pages":"Article 135074"},"PeriodicalIF":6.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637034","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":"Simulations of n-dodecane spray flames in a model gas turbine combustor: Low-temperature chemistry effects","authors":"Jinghe Lu ,&nbsp;Enhui Liu ,&nbsp;Xiao Liu ,&nbsp;Chenyang Cao ,&nbsp;Shumeng Xie ,&nbsp;Shuying Li ,&nbsp;Huangwei Zhang","doi":"10.1016/j.fuel.2025.135061","DOIUrl":"10.1016/j.fuel.2025.135061","url":null,"abstract":"<div><div>The <em>n</em>-dodecane spray flames in a tower-staged lean-premixed pre-vaporized (LPP) combustor are studied using the large eddy simulation (LES)/partially stirred reactor (PaSR) model with skeletal chemistry. Simulations of auto-ignition of two-phase <em>n</em>-dodecane/air mixtures with different liquid equivalence ratios (<span><math><msub><mi>ϕ</mi><mi>l</mi></msub></math></span>) and initial droplet diameters (<span><math><msub><mi>d</mi><mrow><mi>p</mi><mo>,</mo><mn>0</mn></mrow></msub></math></span>) are first studied based on the constant pressure condition. Then, four LES cases are studied to reveal the effects of air flow rate and low-temperature chemistry (LTC) on the fuel spray characteristics and flame unsteadiness, and they are featured by stable combustion, weakly stable combustion, blow-off, blow-off without LTC, respectively. The results show that the auto-ignition delay time increases with <span><math><msub><mi>ϕ</mi><mi>l</mi></msub></math></span> in the high-temperature range (e.g., 1200 K), the negative temperature coefficient (NTC) effects become weak at leaner equivalence ratio (e.g., <span><math><msub><mi>ϕ</mi><mi>l</mi></msub></math></span> = 0.5). In the LES of stable combustion case, the chemical explosive mode analysis shows that autoignition regime is dominant in the combustor, particularly near the burner exit and downstream of the primary recirculating zone. Due to the nature of partial mixing combustion, the heat release rate (HRR) peaks do not fully coincide with the <em>iso</em>-lines of stoichiometric mixture fraction. As the air flow rate increases, the droplet diameter and temperature decrease sharply, the volume averaged HRR and interphase rate of mass and energy increases initially and then decreases. It is also found that the LTC can promote droplet evaporation. In the blow-off case, the flame lift-off height and flame length change drastically, and the LTC can initiate the re-ignition and promote the transition of the stable flame into unstable flame. The unstable flame becomes thinner and longer because of larger air flow rate and weakened chemical reactions, which leads to onset of local extinction towards ultimate blow-off.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"394 ","pages":"Article 135061"},"PeriodicalIF":6.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-ionic surfactant influence on peptization of asphaltene agglomerates in heavy oil under hydrothermal conditions in the Na-Fe3O4 catalyst presence","authors":"Temurali Kholmurodov ,&nbsp;Alexey V. Vakhin ,&nbsp;Oybek Mirzaev ,&nbsp;Sergey A. Sitnov ,&nbsp;Liliya Kh. Galiakhmetova ,&nbsp;Yuriy Galyametdinov ,&nbsp;Arsentiy A. Ryazanov ,&nbsp;Sergey V. Tsvetkov ,&nbsp;Ekaterina A. Bakumenko ,&nbsp;Sergey Y. Malaniy","doi":"10.1016/j.fuel.2025.134966","DOIUrl":"10.1016/j.fuel.2025.134966","url":null,"abstract":"<div><div>This research project examines a promising technology involving the combined injection of surfactants and catalysts into reservoirs for the processing of heavy oil via aquathermolysis. Surfactants act as peptizes, facilitating the weakening of asphaltene agglomerates. The weakening of asphaltene agglomerates allows the catalyst to reach the sulphur-containing component with greater ease, thus facilitating its degradation. In order to ascertain the efficacy of the combined introduction, a Na-Fe₃O₄ catalyst precursor was employed, with a non-ionic surfactant serving the function of a peptize. The alteration in the group composition of the heavy oil prior to and following the treatment was determined through the utilization of XRD, FT-IR, 2D GC–MS, and Malvern Instruments. The results demonstrated that the combined injection method resulted in a notable reduction in the heavy fraction content, from 39.7% to 24.4%, while the light fraction increased from 60.3% to 75.5%. One of the principal outcomes of the combined injection method is the complete neutralization of hydrogen sulphide. Additionally, the destruction of asphaltene agglomerates has resulted in a 56% reduction in oil viscosity. The increase in the H/C elemental analysis coefficient from 1.32 to 1.91 is indicative of an improvement in oil quality following the combined injection process. The combined injection of surfactant and catalyst represents a novel and environmentally-friendly technology for the extraction of high-viscosity oil.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"393 ","pages":"Article 134966"},"PeriodicalIF":6.7,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632032","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":"Investigation of methanol steam reforming reactors with different catalyst support structures on hydrogen production efficiency and methanol conversion","authors":"Yuan Li ,&nbsp;Ze-yu Ma ,&nbsp;Zi-yan Qi ,&nbsp;Zhi-an Xue ,&nbsp;Xiao-long Zhou ,&nbsp;Hao Guo","doi":"10.1016/j.fuel.2025.135079","DOIUrl":"10.1016/j.fuel.2025.135079","url":null,"abstract":"<div><div>Hydrogen is known for its high energy density and pollution-free nature, but it faces challenges in storage and transportation. Methanol, as a liquid fuel, offers a promising solution through methanol steam reforming to produce hydrogen. This paper presents an in-depth study of the support structure shape of a methanol steam reforming hydrogen production reactor and employs principal component analysis (PCA) for hydrogen production efficiency analysis. Aligning with various catalyst support optimization objectives, three distinct optimization strategies are proposed. These approaches are designed to enhance the reactor’s overall heat and mass transfer capacities, thereby increasing both the methanol conversion rate and the hydrogen production rate. Through experimental validation of reaction kinetics coupled with comprehensive numerical simulations, our systematic investigation conclusively demonstrates that the “tubular snake flow channel structure” design exhibits superior reaction performance.<!--> <!-->Under the specific snake flow configuration, both the hydrogen production rate and methanol conversion rate reach remarkable levels. To further improve the reactor’s overall performance, a composite support structure reactor is constructed by meticulously combining multiple support structure optimization schemes. The results show that the composite reactor achieves a methanol conversion rate of 88.245% and a hydrogen output of 46.216 L per hour. The study provides a feasible approach for improving hydrogen production efficiency and optimizing the structure of methanol reforming reactors.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"393 ","pages":"Article 135079"},"PeriodicalIF":6.7,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628091","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":"Combustion and emission characteristics of high n-pentanol blends at low load: A pathway to eco-friendly internal combustion engine operation","authors":"Sunday B. Ogunjide ,&nbsp;Wenjun Zhong ,&nbsp;Tamilselvan Pachiannan ,&nbsp;Yizi Zhu","doi":"10.1016/j.fuel.2025.135032","DOIUrl":"10.1016/j.fuel.2025.135032","url":null,"abstract":"<div><div>There is growing interest in alternative fuel blends in various sectors such as road transport, marine and agriculture, driven by the need for cleaner and more efficient fuel combustion to reduce fossil fuel dependence and meet stringent emission regulations. The n-pentanol/diesel fuel blend is a potential alternative that could lower emissions and enhance engine efficiency. n-Pentanol, a second-generation biofuel, shares unique features with diesel compared to lower chain alcohols. Hence, understanding its combustion and emission characteristics especially under low load conditions is crucial. This study investigates the impacts of different blends of n-pentanol (20 %, 40 %, 60 % and 80 % by volume) with diesel at varying injection timings on the performance of a common rail diesel engine. The results show that 60 % volume of n-pentanol achieved 46.71 % thermal efficiency, an equivalent indicated specific fuel consumption of 174.35 g/kWh, 99.49 % reduction in NO_x emissions and 15 % increase in soot compared to pure diesel. The best performance is obtained with 40 % n-pentanol blend, resulting in 47.48 % thermal efficiency, 171.53 g/kWh equivalent indicated specific fuel consumption, 99.73 % reduction in NO_x emissions and 16.1 % increase in soot compared to pure diesel. Nevertheless, the utilisation of 60 % n-pentanol by volume in diesel engines shows significant potentials, meeting the Euro VI emission standards, offering excellent performance and the capacity to overcome the NO_x and soot trade-off without the necessity for engine modifications under low load conditions.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"393 ","pages":"Article 135032"},"PeriodicalIF":6.7,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628178","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":"Carbon footprint assessment and rheological properties of sodium abietate modified alkali-activated gangue backfill slurry","authors":"Jixiong Zhang ,&nbsp;Qiang Guo ,&nbsp;Binbin Huo ,&nbsp;Yachen Xie ,&nbsp;Meng Li ,&nbsp;Nan Zhou","doi":"10.1016/j.fuel.2025.135086","DOIUrl":"10.1016/j.fuel.2025.135086","url":null,"abstract":"<div><div>Alkali-activated gangue-based backfill slurry (AGBS) can be used for CO₂ storage, but the rheological properties of AGBS are weakened after mineralizing and storing CO₂. Sodium abietate (SA) can act as a CO₂ air-entraining agent to optimize the rheological properties and CO₂ storage of AGBS. In this study, the impact of SA dosage on the rheological properties and CO₂ storage capacity of AGBS was explored. The results show that the incorporation of SA into AGBS leads to the formation of a substantial number of bubbles. These bubbles can be used to sequester CO₂ and provide nucleation sites for the generation of calcium carbonate, thereby reducing the viscosity and enhancing the ball lubrication effects. Consequently, the addition of SA significantly improves both the CO₂ storage capacity and rheological properties of AGBS. The results also indicate that the optimal SA dosage for AGBS is 0.4%. At this concentration, the CO₂ storage capacity of AGBS peaks at 1.97%, while the yield stress, plastic viscosity, and hysteresis loop area are minimized. However, an excessive amount of SA can lead to bubble collapse and fusion, thereby reducing the specific surface area and pore volume of AGBS. As a result, both the CO₂ storage capacity and the rheological properties of AGBS decrease. The results of the carbon footprint analysis show that the incorporation of SA can significantly reduce the carbon emissions from the transportation and production of AGBS and achieve the carbon emission reduction target.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"393 ","pages":"Article 135086"},"PeriodicalIF":6.7,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628092","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}