International Journal of Hydrogen Energy最新文献

{"title":"Improved momentum exchange theory for a regenerative-type hydrogen recirculation blower in vehicular PEMFCs","authors":"Xu Liang,&nbsp;Huifang Kang,&nbsp;Muhammad Umar,&nbsp;Rui Zeng","doi":"10.1016/j.ijhydene.2025.03.324","DOIUrl":"10.1016/j.ijhydene.2025.03.324","url":null,"abstract":"<div><div>The regenerative blowers, with their compact structure and stable performance at low flow rates, are well-suited for hydrogen recirculation in fuel cells operating under low-power conditions, particularly when paired with ejectors. However, the momentum exchange theory exhibits significant deviations when predicting the blower performance at high flow coefficients. This study investigates the limitations of the momentum exchange theory. Numerical simulations and theoretical analyses were conducted to examine the inlet/outlet area ratio (<span><math><mrow><msub><mi>A</mi><mn>1</mn></msub><mo>/</mo><msub><mi>A</mi><mn>2</mn></msub></mrow></math></span>) and velocity centroids (<span><math><mrow><msub><mi>r</mi><mn>1</mn></msub></mrow></math></span> and <span><math><mrow><msub><mi>r</mi><mn>2</mn></msub></mrow></math></span>) of the circulatory flow, and the effects of operating conditions, vane width, and flow channel width on these parameters were also studied. Two nondimensional parameters, the ratio of vane width to vane height and the ratio of flow channel width to vane height, were introduced to refine the prediction of <span><math><mrow><msub><mi>r</mi><mn>1</mn></msub></mrow></math></span> <span><math><mrow><msub><mi>r</mi><mn>2</mn></msub></mrow></math></span> and <span><math><mrow><msub><mi>A</mi><mn>1</mn></msub><mo>/</mo><msub><mi>A</mi><mn>2</mn></msub></mrow></math></span>, resulting in an improved momentum exchange theory. Validation with experimental data demonstrated enhanced prediction accuracy for flow coefficients above 0.23. Specifically, at flow coefficients of 0.424 and 0.475, the corrected model improved accuracy by 9.39 % and 13.39 %, respectively. Consequently, the overall average prediction accuracy of the corrected theory was improved. This study advances the accurate performance evaluation of similar regenerative blowers.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"121 ","pages":"Pages 132-149"},"PeriodicalIF":8.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725862","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}

{"title":"Corrigendum to “Applying artificial intelligence for forecasting behavior in a liquefied hydrogen unit” [Int J Hydrogen Energy 114 (31) (2025) 1–51]","authors":"Dongmei Jing ,&nbsp;AzherM. Abed ,&nbsp;Pinank Patel ,&nbsp;D.T. Arunkumar ,&nbsp;Damanjeet Aulakh ,&nbsp;Bashir Salah ,&nbsp;Ibrahim Mahariq","doi":"10.1016/j.ijhydene.2025.03.255","DOIUrl":"10.1016/j.ijhydene.2025.03.255","url":null,"abstract":"","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Page 601"},"PeriodicalIF":8.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Constructing Ni/Ln-CeO2 (Ln=La, Pr, Sm, Y) catalysts for low-temperature methane steam reforming (MSR): The remarkable enhancement effect of CeO2 lattice doping","authors":"Jingkang Zhong ,&nbsp;Jiamei Ma ,&nbsp;Yufeng Yang ,&nbsp;Xiangyun He ,&nbsp;Yatian Zeng ,&nbsp;Lei Mao ,&nbsp;Junwei Xu ,&nbsp;Xianglan Xu ,&nbsp;Xiuzhong Fang ,&nbsp;Olga E. Lebedeva ,&nbsp;Xiang Wang","doi":"10.1016/j.ijhydene.2025.03.335","DOIUrl":"10.1016/j.ijhydene.2025.03.335","url":null,"abstract":"<div><div>Environmental pollution caused by fossil energy is becoming more and more stringent, and the utilization of clean energy such as H₂ has attracted more attention. MSR is the main way of industrial hydrogen production at present, and developing more efficient catalysts is still desirable and one of the hot issues. In this study, Ni loaded on CeO₂-based solid solution supports doped by various rare earth ions (Ln = La, Pr, Sm, Y) in the matrix have been fabricated for the reaction. The reaction results have demonstrated that the catalytic performance and anti-coking ability follow the order of Ni/La₁Ce₁₉ &gt; Ni/Pr₁Ce₁₉ &gt; Ni/Sm₁Ce₁₉ &gt; Ni/CeO₂ &gt; Ni/Y₁Ce₁₉. Except for Ni/Y₁Ce₁₉, the number of surface oxygen vacancies, active oxygen, basic sites and Ni active surface of the doped catalysts is improved in comparison with the unmodified Ni/CeO₂. The synergistic interaction of the active oxygen anions, basic sites and the Ni active surface is the intrinsic reason to control the catalytic performance. Ni/La₁Ce₁₉ owns the richest amount of both kinds of active sites and the biggest Ni surface area, thereby exhibiting the best activity, stability, coking resistance and the highest H₂ production rate.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"121 ","pages":"Pages 158-170"},"PeriodicalIF":8.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725858","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}

{"title":"Enhanced stability of ammonia-fed protonic ceramic fuel cells via infiltration of Co–Fe catalyst","authors":"Haoliang Tao ,&nbsp;Wenqiang Tang ,&nbsp;Xueyan Zhao ,&nbsp;Liangzhu Zhu","doi":"10.1016/j.ijhydene.2025.03.312","DOIUrl":"10.1016/j.ijhydene.2025.03.312","url":null,"abstract":"<div><div>In this work, Co–Fe catalysts of different molar ratios are infiltrated into protonic ceramic fuel cell (PCFC) to improve the efficiency of ammonia cracking and cell stability. The degradation rate at 600 °C decreases by as high as 88 % under a current density of 625 mA cm⁻², proving the effectiveness of infiltrating Co–Fe catalysts. The postmortem analysis indicates that the infiltrated Co–Fe trends to accumulate to Ni particles in the anode and the synergism of Ni, Fe, and Co contributes to the improvement of structure integrity and cell stability in ammonia. We find that the structure evolution corresponding to cell degradation started from the regions near the anode functional layer and the separation of electrolyte grains could be regarded as the failure initiation for NH₃-fed PCFC. Both electrochemical stability test and the microstructural observation suggest that a decoration of Co to Fe ratio of 1:1 is more beneficial for NH₃-fed PCFC.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"121 ","pages":"Pages 70-78"},"PeriodicalIF":8.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716168","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}

{"title":"Enhancing the efficiency of hydrogen permeation inhibition by means of the synergistic effects of inorganic and organic inhibitors","authors":"Zhi Wang ,&nbsp;Bob Varela ,&nbsp;Anthony Somers ,&nbsp;Mike Yongjun Tan","doi":"10.1016/j.ijhydene.2025.03.285","DOIUrl":"10.1016/j.ijhydene.2025.03.285","url":null,"abstract":"<div><div>Hydrogen permeation inhibition using chemical inhibitors could be a practical and convenient method for protecting steels from hydrogen embrittlement, but its efficiency remains unsatisfactory for industrial applications. This study explores enhancing hydrogen permeation inhibition by combining chemical inhibitors with different characteristics. Inorganic inhibitors sodium nitrite (NaNO₂) and sodium molybdate (Na₂MoO₄) were found to inhibit hydrogen permeation through mechanisms distinct from the organic inhibitor benzotriazole (BTA). NaNO₂ mitigates hydrogen permeation primarily through its self-reduction reaction, which competes with the hydrogen evolution reaction, reducing hydrogen generation and ingress into steel, achieving an inhibition efficiency of up to 52.5 % at a 0.2 M concentration. Na₂MoO₄ reduces hydrogen permeation by forming a protective molybdenum oxide layer that blocks active sites for hydrogen evolution and hydrogen ingress, with a maximum inhibition efficiency of 50.7 % at a 0.2 M concentration. A synergistic effect was observed between Na₂MoO₄ and BTA, significantly enhancing hydrogen permeation inhibition to 86.2 % by forming a denser, thicker composite film on the steel surface. The molybdenum oxide fills defects in the BTA film and provides additional adsorption sites for BTA. These findings suggest a prospect of developing more efficient hydrogen permeation inhibitors by leveraging the synergistic effects of film-forming inorganic and organic inhibitors.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 529-541"},"PeriodicalIF":8.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Predicting hydrogen production in porous foams for steam methane reforming: A combined approach using computational fluid dynamics and machine learning regression models","authors":"Azadeh Jafarizadeh ,&nbsp;Masoud Panjepour ,&nbsp;Mohsen Davazdah Emami","doi":"10.1016/j.ijhydene.2025.03.334","DOIUrl":"10.1016/j.ijhydene.2025.03.334","url":null,"abstract":"<div><div>This study investigates the steam methane reforming (SMR) process within catalytic porous media through numerical simulations, emphasizing the influence of structural parameters in open-cell foams. The foams were created utilizing the Laguerre-Voronoi tessellation technique, which was chosen for its ability to yield high specific surface area and superior heat transfer capabilities. The key parameters studied include inlet velocity (0.5–4 m/s), foam porosity (between 0.7 and 0.9), and pore diameter (1.65–2 mm). To explore the interactions between reactive flow and heat transfer, computational fluid dynamics (CFD) simulations were employed. The results revealed that the structural properties of the catalytic foams significantly influence fluid-solid interactions, pressure drop, heat transfer efficiency, and hydrogen production. To address the computational challenges associated with complex foam geometries, four machine learning (ML) regression models were introduced to create continuous predictive frameworks based on intrinsic foam properties. Among these, Ordinary Least Squares (OLS) emerged as a reliable model for estimating hydrogen production across various foam configurations, achieving an impressive accuracy of 99 % on both training and test datasets. Additionally, the increase in foam length in samples with larger pore diameters and higher porosity, which typically shows reduced methane conversion, lower hydrogen output, and decreased pressure drops, demonstrated potential performance improvements. This study's pore-scale analysis offers a nuanced understanding of the interplay between foam structure and SMR efficiency, emphasizing the transformative role of porous catalytic media in advancing clean energy technologies.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 422-443"},"PeriodicalIF":8.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705569","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}

{"title":"Roles of Na and SiO2 in improving the ammonia synthesis rate and cycling stability of Mo2N-based nitrogen carriers","authors":"Mengxuan Zhang ,&nbsp;Feiyue Guan ,&nbsp;Tuo Guo ,&nbsp;Man Wu ,&nbsp;Qingjie Guo","doi":"10.1016/j.ijhydene.2025.03.346","DOIUrl":"10.1016/j.ijhydene.2025.03.346","url":null,"abstract":"<div><div>Chemical looping ammonia synthesis (CLAS) is a method for sustainable ammonia production under low temperatures and atmospheric pressure. The key to CLAS lies in the development of an efficient nitrogen carrier (NC). In this study, a composite NC with excellent ammonia synthesis performance and high cycling stability was investigated for CLAS using Na-modified Mo₂N supported on SiO₂. The results show that the Na/Mo₂N/SiO₂ NC achieves an impressive maximum ammonia synthesis rate of 4345 μmol g⁻¹ h⁻¹. The enhanced performance of the Na/Mo₂N/SiO₂ NC is attributed to the role of Na in accelerating the release rate of lattice nitrogen, whereas SiO₂ improves NH₃ selectivity. After 9 cycles under ambient pressure, the ammonia synthesis rate of the Na/Mo₂N/SiO₂ NC remained stable at approximately 854 μmol g⁻¹ h⁻¹ because Na and SiO₂ facilitate the regeneration of Mo₂N. Furthermore, SiO₂ minimises the loss of the active component Na, thereby enhancing cycling stability. This study provides valuable insights into future research on NCs.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 497-506"},"PeriodicalIF":8.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705570","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}

{"title":"Techno-economic and environmental analysis of hybrid SOFC-GT-sCO2 systems for sustainable energy generation","authors":"Anil Kumar Yadav ,&nbsp;Shailendra Sinha ,&nbsp;Anil Kumar","doi":"10.1016/j.ijhydene.2025.03.238","DOIUrl":"10.1016/j.ijhydene.2025.03.238","url":null,"abstract":"<div><div>This study employs a supercritical carbon dioxide (sCO₂) system to recover and repurpose the excess heat from the solid oxide fuel cell (SOFC)-gas turbine (GT) for electricity generation. Thermodynamic, economic, and environmental assessments of integrated power generation using SOFC-GT with three configurations of sCO₂ cycle are reported. The Engineering Equation Solver (EES) software is used to model the system configuration. The compared sCO₂ technologies are recuperation, recompression, and partial heating cycles. Recuperated sCO₂ cycle achieves optimum value of electrical, exergy efficiencies, CO₂ emission, and total cost rate as 61.49 %, 59.15 %, 0.322 kg/kWh, and 4.74 $/h, respectively. Recompression cycle hybrid system achieves electrical, exergy efficiencies, CO₂ emission, and total cost rate of 61.09 %, 58.77 %, 0.324 kg/kWh, and 5.646 $/h, respectively. Preheating cycle achieves the electrical, exergy efficiencies, CO₂ emission, and total cost rate of 61.46 %, 59.12 %, 0.322 kg/kWh, and 5.941 $/h, respectively. LCOE of the recuperated, recompression, and partial heating cycles are 39.4 $/MWh, 42.31$/MWh, and 42.94 $/MWh, respectively.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 558-571"},"PeriodicalIF":8.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705657","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}

{"title":"Influence of pore structure and surface characteristics of balsa wood-derived activated carbon on hydrogen production from methane decomposition","authors":"Haipeng Cui ,&nbsp;Song Hu ,&nbsp;Tao Yang ,&nbsp;Limo He ,&nbsp;Kai Xu ,&nbsp;Long Jiang ,&nbsp;Sheng Su ,&nbsp;Yi Wang ,&nbsp;Jun Xu ,&nbsp;Jun Xiang","doi":"10.1016/j.ijhydene.2025.03.329","DOIUrl":"10.1016/j.ijhydene.2025.03.329","url":null,"abstract":"<div><div>Carbon-based catalysts are highly promising for hydrogen production via methane cracking due to their low cost, high-temperature stability, and resistance to sulfur poisoning. However, their practical application is hindered by several challenges, including difficulty in identifying active sites, complexity in catalyst preparation, and limited stability. In this study, we investigated the effects of surface functional groups and specific surface area on methane adsorption and decomposition using balsa wood-derived activated carbon. Three distinct activation methods were employed to modify the carbon, resulting in variations in surface area and functional group composition. Experimental results demonstrated that optimizing the specific surface area significantly enhances methane conversion, with potassium hydroxide-treated activated carbon achieving a methane conversion rate of 62 % and a hydrogen yield of 57 %, both 20 % points higher than those of unmodified biochar. Molecular dynamics and Monte Carlo simulations revealed that surface oxygen-containing functional groups, particularly carbonyl groups, play a crucial role in promoting methane decomposition by enhancing adsorption and interactions with the catalyst. These findings underscore the importance of optimizing both surface structure and functional groups of activated carbon to improve catalytic performance in methane cracking.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"121 ","pages":"Pages 1-13"},"PeriodicalIF":8.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716234","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}

{"title":"A comparative review of alternative fuels: Diesel-HHO and diesel-hydrogen via enrichment method in diesel engines application","authors":"Wan Nur Izzati Wan Mahdi ,&nbsp;Ahmad Muhsin Ithnin ,&nbsp;Wira Jazair Yahya ,&nbsp;Dhani Avianto Sugeng ,&nbsp;Frendy Rian Saputro ,&nbsp;Muhammad Adib Abdul Rashid","doi":"10.1016/j.ijhydene.2025.03.319","DOIUrl":"10.1016/j.ijhydene.2025.03.319","url":null,"abstract":"<div><div>The growing interest in alternative fuels as the main energy source has become a driving force in many countries as the diminishing fossil fuel has been used in major industrial sectors for economic stability and sustainability. The attention to the use of hydrogen as an alternative energy source has been of interest due to its sustainability, greenness, and cleanliness as one of the energy sources. The combination of diesel and biodiesel fuel with hydrogen crafts a new pathway to achieve less dependency on fossil fuel and less carbon emissions from the application of hydrogen and HHO in diesel engine applications. A comparative analysis of diesel engines enhanced with HHO and hydrogen, focusing on performance, efficiency, and environmental impact in compression ignition (CI) engines through the enrichment method of the intake manifold, examining fuel consumption, exhaust emissions, and combustion characteristics to determine the viability and sustainability of alternative fuels in improving engine efficiency and reducing environmental pollution. The findings reveal that both HHO and hydrogen enrichment improves engine performance and fuel efficiency, with hydrogen showing a more significant reduction in harmful emissions like Carbon Monoxide (CO) and Hydrocarbon (HC) emissions. Hydrogen and HHO enrichment in diesel engines exhibit superior combustion characteristics, leading to cleaner and more efficient fuel utilization. The study concludes that while both HHO and hydrogen are viable for enhancing diesel engine performance, hydrogen offers greater potential for substantial emissions reductions. Thus, this comparison provides valuable insights for future research based on previous studies that have been done and development in sustainable diesel engine technologies, highlighting the importance of integrating greener solutions in the pursuit of environmental sustainability and efficiency in the automotive industry.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 444-472"},"PeriodicalIF":8.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705658","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}