Renewable Energy最新文献_第2页

Effect of fracture geometry characteristics on thermal convection of basin-scale groundwater 裂缝几何特征对盆地地下水热对流的影响

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123446

Yuanzhuo Dong , Yanlong Kong , Yaqian Ren , Yonghui Huang , Zhonghe Pang

{"title":"Effect of fracture geometry characteristics on thermal convection of basin-scale groundwater","authors":"Yuanzhuo Dong , Yanlong Kong , Yaqian Ren , Yonghui Huang , Zhonghe Pang","doi":"10.1016/j.renene.2025.123446","DOIUrl":"10.1016/j.renene.2025.123446","url":null,"abstract":"<div><div>This study investigates fracture geometry impacts on basin-scale groundwater thermal convection, focusing on aperture, length, inclination, and density. A two-dimensional numerical model evaluates interactions between forced and free thermal convection using temperature fields and Rayleigh numbers. In our scenario, larger fracture apertures tend to enhance forced thermal convection, while fractures whose apertures larger than 0.08 m will promote free thermal convection to some extent. Increased length and density expand heat transfer areas, yet rapid fluid flow through preferential pathways may reduce efficiency. Equilibrium occurs at 300 m length and 50 fractures, beyond which forced convection raises the critical Rayleigh number threshold by 2–4 times. Fractures at 45° inhibit free convection by forming \"V\"-shaped channels that enhance forced convection, increasing thresholds by 1.5–3.2 times. Through sensitivity analysis, fracture length and density were identified as the most influential factors among geometric characteristics. Additionally, we defined the heat extraction rate of geothermal systems and found that optimal geothermal targets in fractured karst reservoirs require larger apertures, moderate lengths (300 m), 45° intersections, and moderate densities (50 fractures). These findings provide valuable insights into optimizing geothermal resource exploitation, highlighting the role of fracture networks in shaping groundwater heat transfer dynamics.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123446"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072091","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

Boosting bioelectricity performance in sediment microbial fuel cells with raw bamboo biochar as a sustainable energy source 以竹炭为可持续能源提高沉积物微生物燃料电池的生物电性能

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123457

Nurfarhana Nabila Mohd Noor, Kyunghoi Kim

{"title":"Boosting bioelectricity performance in sediment microbial fuel cells with raw bamboo biochar as a sustainable energy source","authors":"Nurfarhana Nabila Mohd Noor, Kyunghoi Kim","doi":"10.1016/j.renene.2025.123457","DOIUrl":"10.1016/j.renene.2025.123457","url":null,"abstract":"<div><div>Sediment microbial fuel cell (SMFC) is a sustainable technology to generate bioelectricity for bioenergy production. In this study, bamboo biochar is mixed with coastal benthic sediment from oyster farm as conductive aid to optimize SMFC capacity for bioelectricity production. Laboratory-scale SMFCs are constructed with different biochar dosages, including control (SMFC-P0) and biochar cases (SMFC-P5, SMFC-P10 and SMFC-P20), to confirm the effect of biochar on bioelectricity generation and carbon sequestration. Operating SMFCs with a moderate dosage of bamboo biochar in SMFC-P5 (5g biochar) and SMFC-P10 (10g biochar) reduces internal resistance by 29.8 % and 57.5 %, resulting in high output voltage for SMFC-P5 (23 mV) and SMFC-P10 (68 mV), with a 1.3 and 3.2-fold increase, respectively. SMFC-P10 achieves maximum power density of 19.7 mW/m<sup>2</sup> with optimal biochar addition in anodic region, enhancing overall SMFC performance due to reduction in ohmic resistance. SMFC-P10 exhibits the highest redox activity, resulting in the highest current response during initial (10.4 mA) and final (8.22 mA) cyclic voltammetry. High electrode capacitance due to biochar addition minimizes charge transfer resistance, improving electron transfer. Anodic biofilm thrives under moderate biochar dosages below 2 %. Biochar addition reduces sediment CO<sub>2</sub> emissions, indicating that it improves soil quality and effectively sequesters soil carbon.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123457"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948536","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

Experimental analysis of thermal energy variations in parabolic dish solar collector with hybrid heat storage medium 混合蓄热介质抛物盘式太阳能集热器热能变化的实验分析

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123436

Ravi Saravanan , Alagu Karthikeyan , Prajith Prabhakar , N. Poyyamozhi

{"title":"Experimental analysis of thermal energy variations in parabolic dish solar collector with hybrid heat storage medium","authors":"Ravi Saravanan , Alagu Karthikeyan , Prajith Prabhakar , N. Poyyamozhi","doi":"10.1016/j.renene.2025.123436","DOIUrl":"10.1016/j.renene.2025.123436","url":null,"abstract":"<div><div>This study tests a solar thermal system for household hot water, combining a parabolic dish collector with a dual-purpose heat storage medium. It examines how factors like heating fluid flow rate, storage material composition, and cold-water flow rate impact heat transfer efficiency. Distilled water was used as the heat transfer fluid, while a mixture of Erythritol and 1.5 wt % Co<sub>3</sub>O<sub>4</sub> nanoparticles served as the heat storage medium, capturing solar energy during the day and releasing it at night. The system performed best when the solar receiver absorbed 77.5 W of heat at a flow rate of 0.5 l/min. Heat transfer efficiency improved as the flow rate increased to 2 l/min but declined beyond this point. The maximum storage capacity was 220 W using only Erythritol, but adding Co<sub>3</sub>O<sub>4</sub> nanoparticles enhanced efficiency by boosting thermal conductivity. Cold-water flow rates between 0.5 l/min and 2 l/min affected convective heat transfer, with lower rates reducing efficiency. The system's peak performance occurred between 06:00 and 14:00 due to direct solar radiation. While individual components had lower exergy values, the overall system demonstrated a high sustainability index, effectively storing and delivering solar energy for continuous water heating.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123436"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948533","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

Impacts of microbial competition on underground bio-methanation of hydrogen and carbon dioxide: Insights from biogeochemical simulations 微生物竞争对地下氢和二氧化碳生物甲烷化的影响：来自生物地球化学模拟的见解

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123458

Lin Wu , Zhengmeng Hou , Zhifeng Luo

{"title":"Impacts of microbial competition on underground bio-methanation of hydrogen and carbon dioxide: Insights from biogeochemical simulations","authors":"Lin Wu , Zhengmeng Hou , Zhifeng Luo","doi":"10.1016/j.renene.2025.123458","DOIUrl":"10.1016/j.renene.2025.123458","url":null,"abstract":"<div><div>The emerging technology of underground bio-methanation (UBM) from hydrogen (H<sub>2</sub>) and carbon dioxide (CO<sub>2</sub>) enables renewable natural gas production, large-scale renewable energy storage, and carbon utilization and sequestration. However, during the UBM process, acetogens and sulfate-reducing bacteria (SRB) may compete with methanogens for H<sub>2</sub> and CO<sub>2</sub>, affecting methane production. This competition has been relatively less explored. To address this, a microbial kinetic model incorporating environmental effects and spatial constraints was developed to investigate microbial competition in UBM. The study revealed that SRB's H<sub>2</sub> consumption is primarily limited by sulfate availability in formation water, whereas acetogen metabolism can significantly affect conversion efficiency. In the absence of carbonate minerals, pH reduction from acetogen metabolism may even halt the conversion process. Furthermore, increased salinity, particularly above 90 g/L, along with a higher CO<sub>2</sub>/H<sub>2</sub> ratio, can inhibit methanogen activity, potentially leading to more substrate being converted into acetate. The injection ratio for fully consuming both CO<sub>2</sub> and H<sub>2</sub>, accounting for C/H needs in biomass synthesis, is 1:3.78. Additionally, a larger maximum biomass capacity enables methanogens to quickly consume all CO<sub>2</sub> and H<sub>2</sub>, reducing competition from other microbes. The study's findings provide valuable insights for site selection and optimal design in the implementation of UBM.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123458"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941735","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

Electrochemical and mechanical performance degradation mechanisms of solid oxide fuel cell stacks under long-term operation 固体氧化物燃料电池堆长期运行的电化学和力学性能退化机理

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123462

Hongxiang Zheng , Wenchun Jiang , Yun Luo , Ming Song , Xiucheng Zhang , Shan-Tung Tu

{"title":"Electrochemical and mechanical performance degradation mechanisms of solid oxide fuel cell stacks under long-term operation","authors":"Hongxiang Zheng , Wenchun Jiang , Yun Luo , Ming Song , Xiucheng Zhang , Shan-Tung Tu","doi":"10.1016/j.renene.2025.123462","DOIUrl":"10.1016/j.renene.2025.123462","url":null,"abstract":"<div><div>Solid oxide fuel cells (SOFC) are an efficient energy conversion technology that directly convert chemical energy in fuel into electricity. However, the instability of the electrochemical and mechanical performance of SOFC during long-term operation presents a significant challenge to their commercialization. To address this issue, we employ electrochemical impedance spectroscopy, small punching tests and nanoindentation techniques to investigate the evolution of voltage and mechanical performance of SOFC stacks over 5000 h. Our findings indicate an average cell voltage degradation rate of 6.23 %/kh at 300 mA/cm<sup>2</sup> after 5000 h. The contribution of each factor causing voltage degradation is quantitatively evaluated, revealing that ohmic resistance degradation predominates, followed by cathodic-side O<sub>2</sub> surface exchange kinetic and O<sup>2−</sup> diffusion. Furthermore, the high-temperature flexural strength, elastic modulus, and hardness of the single cell exhibit noticeable declines within the initial 10 h, with a 67.72 % reduction in flexural strength after 5000 h. Severe deterioration of nickel particles is observed in the anode, while strontium segregation, chromium poisoning and silver contamination are identified in the cathode. Overall, the quantitative analysis of changes in the performance of the stack is crucial for enhancing the long-term durability of SOFCs and their commercial applications in renewable energy systems.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123462"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941745","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

Speed control and hydrodynamic performance analysis of vertical axis tidal turbine under surge motion 波浪运动下垂直轴潮汐水轮机速度控制及水动力性能分析

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123464

Yonglin Ye , Yuting Lu , Shuqi Wang , Wei Guo , Kai Wang

{"title":"Speed control and hydrodynamic performance analysis of vertical axis tidal turbine under surge motion","authors":"Yonglin Ye , Yuting Lu , Shuqi Wang , Wei Guo , Kai Wang","doi":"10.1016/j.renene.2025.123464","DOIUrl":"10.1016/j.renene.2025.123464","url":null,"abstract":"<div><div>In the actual operation of a floating vertical axis tidal turbine (VATT), the VATT undergoes wave-induced motion with the floating carrier, resulting in a constantly changing relative inflow velocity of the VATT. With the VATT rotating at a fixed speed, the tip speed ratio would vary over time, leading to a lower average energy utilization rate. Therefore, a variable speed control model based on surge velocity is proposed, and a CFD numerical method is presented for a VATT rotating at variable speed under surge motion. The proposed variable speed control model is effective in improving the average energy utilization rate, e.g., by 36.09 % at a surge period of 2.9 s and a surge amplitude of 0.1 m, as compared to fixed speed rotation. Based on this, a rapid forecast method for hydrodynamic loads of the VATT during variable speed rotation and surge motion is established, considering the variation of the damping coefficient during fixed speed rotation and surge motion. Compared with the CFD results, the proposed method can quickly and effectively forecast the VATT's hydrodynamic loads. The findings can provide a reference for the speed control of floating VATT in actual operation and the rapid prediction of the VATT's hydrodynamic load.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123464"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068254","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

Scaling between areas of electrolyzer electrodes and solar modules achieving over 15 % solar to hydrogen conversion efficiency: Silicon and CIGS 电解槽电极和太阳能模块之间的缩放实现超过15%的太阳能到氢转换效率：硅和CIGS

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123454

Oleksii Omelianovych , Ngoc-Anh Nguyen , Liudmila Larina , Inchan Hwang , Kihwan Kim , Byeonggwan Kim , Donghyeop Shin , Ho-Suk Choi

{"title":"Scaling between areas of electrolyzer electrodes and solar modules achieving over 15 % solar to hydrogen conversion efficiency: Silicon and CIGS","authors":"Oleksii Omelianovych , Ngoc-Anh Nguyen , Liudmila Larina , Inchan Hwang , Kihwan Kim , Byeonggwan Kim , Donghyeop Shin , Ho-Suk Choi","doi":"10.1016/j.renene.2025.123454","DOIUrl":"10.1016/j.renene.2025.123454","url":null,"abstract":"<div><div>This study aims to maximize the efficiency of solar-to-hydrogen generation systems by optimizing the relative areas of the electrodes and solar modules. The core objective is to identify the optimal balance between these components to achieve the highest energy conversion efficiency. We conducted a series of experiments using lab-scale silicon and copper indium gallium selenide solar modules, along with platinum on carbon and ruthenium dioxide-based electrocatalyst electrodes. By increasing the area of the water-splitting electrodes while decreasing the solar module area, we achieved solar-to-hydrogen conversion efficiencies of 12.30 % for the silicon module and 15.34 % for the copper indium gallium selenide module. Our findings indicate that the optimal ratio between the electrode and solar module areas depends on the type of solar module. To better understand this relationship, we analyzed the normalized current-voltage characteristics of the solar modules, which allowed us to evaluate the system's potential to reach the maximum theoretical efficiency. Additionally, we introduce the concept of coupling effectiveness to quantify how efficiently the integrated system utilizes captured solar energy. In this study, we achieved a coupling effectiveness of 85.7 %, which is the highest value reported to date for similar systems.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123454"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068505","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

Feasibility analysis of oil shale catalyzed water electrolysis for hydrogen production 油页岩催化电解水制氢可行性分析

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123448

Qing Wang , Chengxu Sun , Da Cui , Jingru Bai , Chunlei Wu , Shuang Wu , Jinghui Zhang

{"title":"Feasibility analysis of oil shale catalyzed water electrolysis for hydrogen production","authors":"Qing Wang , Chengxu Sun , Da Cui , Jingru Bai , Chunlei Wu , Shuang Wu , Jinghui Zhang","doi":"10.1016/j.renene.2025.123448","DOIUrl":"10.1016/j.renene.2025.123448","url":null,"abstract":"<div><div>Carbon-assisted catalytic hydroelectrolysis (CAWE) has been demonstrated to significantly reduce energy consumption and enhance the economic viability of hydrogen production. In this study, BP oil shale was employed as an additive in a sulfuric acid environment for catalytic water electrolysis experiments. The results indicate a pronounced increase in current when the voltage reaches 1.42 V. Analysis reveals that iron ions (Fe<sup>2+</sup>/Fe<sup>3+</sup>) play a dual role in facilitating charge transfer and mediating the redox cycle; however, their catalytic efficiency is constrained by the organo-mineral passivation layer that progressively forms on the surface of the oil shale. Utilizing a solid-liquid phase separation method, comparative analysis shows that the maximum current density of liquid-phase electrolysis reaches 8 mA, which is double that of solid-phase electrolysis. However, the current decays rapidly, and stability duration is reduced by 78 % compared to the solid-phase system. Gas chromatographic characterization of the anode products indicates a partial oxidation pathway involving intermediate hydrocarbons (CnHmXy), rather than corresponding gas formation. This study confirms that optimizing the iron regeneration pathway and inhibiting surface passivation are critical breakthroughs for promoting the engineering application of this technology. These findings provide basic insights into the catalytic hydroelectrolysis of oil shale for hydrogen production.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123448"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068249","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

Leveraging AI for accurate prediction of hydrogen density (in pure/mixed Form): Implications for hydrogen energy transition processes 利用人工智能准确预测氢密度（纯/混合形式）：对氢能转换过程的影响

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123447

Mohammad Behnamnia, Hossein Sarvi, Abolfazl Dehghan Monfared

{"title":"Leveraging AI for accurate prediction of hydrogen density (in pure/mixed Form): Implications for hydrogen energy transition processes","authors":"Mohammad Behnamnia, Hossein Sarvi, Abolfazl Dehghan Monfared","doi":"10.1016/j.renene.2025.123447","DOIUrl":"10.1016/j.renene.2025.123447","url":null,"abstract":"<div><div>The transition to sustainable energy is critical to addressing climate change and growing energy demands. Hydrogen, as a clean energy carrier, supports this transition by stabilizing grids and integrating renewables. Accurate prediction of hydrogen's thermophysical properties, particularly gas density, is crucial for operational safety, efficiency, and hydrogen-dependent processes like transportation, conversion, and utilization. This study develops an artificial intelligence framework to predict hydrogen density in pure form and mixtures with gases such as methane, nitrogen, and carbon dioxide across varying pressure, temperature, and molecular weight conditions. Using 3336 experimental data points, advanced machine learning models—including Decision Tree, Random Forest, Adaptive Boosting, Multilayer Perceptron (MLP), and K-Nearest Neighbors—were applied. The MLP model demonstrated the highest accuracy (R<sup>2</sup> = 0.9956, NRMSE = 1.4147 %). Feature importance analysis identified molecular weight as the most influential factor, followed by pressure, while temperature showed a negative correlation. These findings highlight the potential of AI-driven methods to enhance hydrogen technologies, contributing to efficiency and reliability in hydrogen processes. This research provides valuable insights for advancing clean energy systems and supporting the global shift toward a sustainable energy future.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123447"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948569","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

Biodiesel production by iron oxide supported on light weight expanded clay aggregate (Fe2O3-f-LECA) Catalyst: Box-Behnken design-based optimization and ANFIS modeling with GA and PSO 轻质膨胀粘土骨料（Fe2O3-f-LECA）负载氧化铁制备生物柴油催化剂：基于Box-Behnken设计的优化和基于遗传算法和粒子群算法的ANFIS建模

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-05-12 DOI: 10.1016/j.renene.2025.123466

Ensie Bekhradinassab , Morteza Esfandyari

{"title":"Biodiesel production by iron oxide supported on light weight expanded clay aggregate (Fe2O3-f-LECA) Catalyst: Box-Behnken design-based optimization and ANFIS modeling with GA and PSO","authors":"Ensie Bekhradinassab , Morteza Esfandyari","doi":"10.1016/j.renene.2025.123466","DOIUrl":"10.1016/j.renene.2025.123466","url":null,"abstract":"<div><div>This study presents the synthesis of an iron oxide-supported functionalized lightweight expanded clay aggregate (f-LECA) catalyst via the microwave solution combustion method for biodiesel production. Characterization techniques, including XRD, FESEM, TEM, BET-BJH, and TPD-NH<sub>3</sub>, confirmed the uniform dispersion of iron oxide on f-LECA, leading to enhanced catalytic performance. BET-BJH analysis revealed a specific surface area of 8.35 m<sup>2</sup>/g, an average pore width of 10.47 nm, and a well-developed pore structure conducive to catalytic reactions. The catalyst exhibited strong acidity, as evidenced by ammonia desorption peaks at 346 °C and 390 °C, indicating the presence of medium-strength acidic sites essential for transesterification. A maximum biodiesel conversion of 96.47 % was achieved under optimized conditions: 100 °C, a methanol-to-oil molar ratio of 20, 3 wt% catalyst loading, and 1-h reaction time. Optimization using Response Surface Methodology (RSM) and Adaptive Neuro-Fuzzy Inference System (ANFIS) modeling demonstrated a strong correlation (R<sup>2</sup> > 0.96) between predicted and experimental results. Further refinement using the Particle Swarm Optimization (PSO) algorithm enhanced model accuracy, yielding minimal error values based on MAE, MSE, RMSE, and R<sup>2</sup> metrics. The excellent catalytic activity, economic feasibility, and environmental sustainability of f-LECA-supported iron oxide make it a promising candidate for large-scale biodiesel production from oleic acid.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"251 ","pages":"Article 123466"},"PeriodicalIF":9.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941736","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