International Journal of Hydrogen Energy最新文献_第3页

Influence of N and B doping on advancing hydrogen storage capabilities of 2D polyaramid N和B掺杂对提高二维聚酰胺储氢性能的影响

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.153015

Antara Vaidyanathan , Vaibhav Wagh , Brahmananda Chakraborty

The possibility of enhancing the hydrogen affinity of a 2D carbon-based substrate with substitutional doping using B and N atoms in place of C atoms is explored herein. Density functional theory (DFT) calculations were performed to systematically explore mono-, di-, and tri-substituted B/N/BN atoms in a 2D polymer called 2D polyaramid (2DPA), which bears rich nitrogen functionalities. The hydrogen adsorption energy was used as a metric to develop a doping protocol. Among the studied structures, BBB- and NNB-2DPA gave H₂ adsorption energies exceeding −0.2 eV, satisfying the US Department of Energy's criteria for onboard hydrogen storage in light-duty fuel cell vehicles. Here, BBB-2DPA indicates 2DPA with three atoms substituted for three boron atoms and NNB-2DPA indicates 2DPA with three atoms substituted for two N and one B atoms. The highest H₂ adsorption energy for BBB- and NNB-2DPA was −0.234 and −0.268 eV, respectively—considerably enhanced compared to that in pristine 2DPA (−0.116 eV). Here, BBB- and NNB-2DPA represent 2DPA with three C atoms replaced with three B atoms (BBB) and 2 N and 1B atoms (NNB), respectively. Using electronic structure analysis, synergistic effects of co-doping were revealed, such as increased conductivity and reduced work function, which served to enhance H₂ affinity. Ab initio molecular dynamics and phonon dispersion calculations pointed towards the thermal and dynamical stability of BBB- and NNB-2DPA. This work emphasizes the role of tailored doping strategies in obtaining target H₂ affinities from carbon-based nanomaterials.

本文探讨了用B和N原子取代C原子来增强二维碳基衬底的亲氢性的可能性。通过密度泛函理论（DFT）计算，系统地研究了2D聚酰胺（2DPA）中单取代、二取代和三取代的B/N/BN原子，该聚合物具有丰富的氮官能团。以氢吸附能为指标，制定了掺杂方案。在所研究的结构中，BBB-和NNB-2DPA的H2吸附能超过- 0.2 eV，满足美国能源部对轻型燃料电池汽车车载储氢的标准。其中，BBB-2DPA表示3个原子取代3个硼原子的2DPA， NNB-2DPA表示3个原子取代2个N原子和1个B原子的2DPA。BBB-和NNB-2DPA的H2吸附能最高分别为- 0.234和- 0.268 eV，与原始2DPA （- 0.116 eV）相比有显著提高。这里，BBB-和NNB-2DPA分别表示3个C原子被3个B原子（BBB）和2个N和1B原子（NNB）取代的2DPA。通过电子结构分析，揭示了共掺杂的协同效应，如电导率的提高和功函数的降低，从而增强了H2的亲和力。从头算分子动力学和声子色散计算表明BBB-和NNB-2DPA具有热稳定性和动力学稳定性。这项工作强调了定制掺杂策略在从碳基纳米材料中获得目标H2亲和性方面的作用。

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引用次数: 0

Catalytically active plate heat exchanger for flexible hydrogen release from perhydro benzyltoluene 用于过氢苄基甲苯柔性释氢的催化活性板式换热器

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.153072

P. Nathrath , T. Hein , M. Li , F. Lederle , P. Wasserscheid , E.G. Hübner , P. Schühle

In the future energy system, hydrogen is expected to play an important role as a large-scale energy storage option. The liquid organic hydrogen carrier (LOHC) technology enables safe and long-term hydrogen storage using the existing tank infrastructure available from the current fossil fuel products. On-demand hydrogen release from LOHC systems followed by its use in fuel cells or combined cycle power plants (CCP) can provide green electricity to the grid in a load flexible manner. However, to serve fast load changes in the grid, highly dynamic LOHC dehydrogenation reactors with fast response times are required. In this study, we demonstrate a catalytic plate reactor (CPR) derived from the design of conventional plate heat exchangers for the continuous and dynamic dehydrogenation of perhydro benzyltoluene. The surface of corrugated heat exchanger plates in the size of 15 × 15 cm has been catalytically activated by spray-coating and laser texturing techniques. These activated plates have been investigated in continuous operation under different stationary reaction conditions (290–340 °C; 2.5–5 bar_a and 1–3 g_H12-BT min⁻¹) achieving technical relevant degrees of dehydrogenation (DoDHs) above 80 %, activities up to 0.27 mg_H2 cm⁻² min⁻¹ and stable hydrogen release for several hundred hours of operation. Furthermore, the new CPR exhibited short hysteresis times when feed flow or reaction temperature were dynamically changed demonstrating impressively its suitability for on-demand hydrogen provision. Finally, the CPR was successfully operated following the dynamic load profile of a technical relevant CCP scenario.

在未来的能源系统中，氢有望作为一种大规模的储能选择发挥重要作用。液态有机氢载体（LOHC）技术利用现有的化石燃料产品储罐基础设施，实现了安全和长期的氢储存。从LOHC系统按需释放氢气，然后将其用于燃料电池或联合循环发电厂（CCP），可以以负载灵活的方式为电网提供绿色电力。然而，为了满足电网中负荷的快速变化，需要具有快速响应时间的高动态LOHC脱氢反应堆。在这项研究中，我们展示了一种催化板式反应器（CPR），该反应器源自传统板式换热器的设计，用于过氢苄基甲苯的连续和动态脱氢。采用喷涂和激光变形技术对15 × 15 cm的波纹热交换板表面进行了催化活化。这些活化板在不同的固定反应条件下（290-340°C， 2.5-5 bara和1 - 3 gH12-BT min - 1）连续操作进行了研究，脱氢的技术相关度（DoDHs）超过80%，活度高达0.27 mgH2 cm - 2 min - 1，运行数百小时稳定释氢。此外，当进料流量或反应温度发生动态变化时，新型CPR表现出较短的滞后时间，令人印象深刻地表明其适合按需提供氢气。最后，CPR在技术相关CCP场景的动态负载概况下成功运行。

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引用次数: 0

Roles of activated carbon in fuel cells: A critical review 活性炭在燃料电池中的作用综述

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.153069

Zulfirdaus Zakaria , Ninie Suhana Abdul Manan , Yong Zulina Zubairi , Iesti Hajar Hanapi , Siti Kartom Kamarudin , Mohd Nur Ikhmal Salehmin , Mohd Shahneel Saharudin

Fuel cells are widely recognized as a promising clean energy technology due to their high efficiency, low emissions, and potential integration within future sustainable energy systems. However, their widespread commercialization remains hindered by the high cost and limited scalability of main components, particularly platinum-based catalysts, advanced gas diffusion layers, and polymer electrolyte membranes. Despite extensive progress, conventional carbon materials offer limited multifunctionality across these components, highlighting a critical gap in cost-effective and durable material design. This review addresses this gap by focusing on activated carbon (AC) as a sustainable and multifunctional material platform for fuel cells. It critically analyzes the correlations between AC synthesis routes, structural characteristics, and electrochemical behavior that influences the performance in electrodes, gas diffusion layers, and polymer electrolyte membranes. Recent advances including heteroatom doping, hybrid carbon composites, and engineered biochar are systematically discussed to clarify the mechanisms that enhance conductivity, mass transport, and interfacial stability. The review uniquely integrates circular economy and sustainability perspectives, emphasizing biomass valorization and waste-to-carbon strategies. Overall, this work provides a concise and progressive assessment the potential of AC to advance next-generation, low-cost, and environmentally responsible fuel cell technologies aligned with global decarbonization goals, SDG 7 (Affordable and Clean Energy) and SDG 12 (Responsible Consumption and Production).

燃料电池因其高效、低排放和在未来可持续能源系统中的潜在集成而被广泛认为是一种有前途的清洁能源技术。然而，它们的广泛商业化仍然受到主要组件的高成本和有限的可扩展性的阻碍，特别是铂基催化剂，先进的气体扩散层和聚合物电解质膜。尽管取得了广泛的进展，但传统的碳材料在这些组件上提供的多功能有限，突出了在成本效益和耐用材料设计方面的关键差距。本文将重点介绍活性炭（AC）作为一种可持续和多功能的燃料电池材料平台。它批判性地分析了影响电极、气体扩散层和聚合物电解质膜性能的交流合成路线、结构特征和电化学行为之间的相关性。本文系统地讨论了杂原子掺杂、杂化碳复合材料和工程生物炭等近年来的研究进展，以阐明提高导电性能、质量传递和界面稳定性的机制。该综述独特地整合了循环经济和可持续性的观点，强调生物质价值和废物转化为碳的战略。总的来说，这项工作提供了一个简明而渐进的评估，以推动下一代低成本和环境负责的燃料电池技术，与全球脱碳目标，可持续发展目标7（负担得起的清洁能源）和可持续发展目标12（负责任的消费和生产）相一致。

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引用次数: 0

Low-voltage SEM imaging of the four-phase microstructure of the fuel electrode of a solid oxide electrolysis cell using mixed detector signals to quantify location specific percolated Ni loss 使用混合探测器信号对固体氧化物电解电池燃料电极的四相微观结构进行低压扫描电镜成像，以量化特定位置的渗透镍损失

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.153111

Emily Ghosh , Ayesha Akter , Jillian Rix Mulligan , Srikanth Gopalan , Uday B. Pal , Soumendra N. Basu

Solid oxide electrolysis cells (SOECs) provide promising solutions for grid-scale energy storage and clean hydrogen generation, However, degradation of the Ni-YSZ fuel electrode, primarily through loss of Ni percolation leads to loss in cell performance and decreased cell lifetimes. In this study, a low voltage scanning electron microscopy (SEM) technique using mixed detector signals was developed to separate percolated Ni, unpercolated Ni, pore, and YSZ phases in a single image using contrast. This technique was used to study the evolution of a Ni-YSZ fuel electrode after 500hrs of SOEC operation at 800 °C. The fine-microstructured active layer and a portion of the directly adjacent coarse-microstructured support layer were studied in electrochemically active and electrochemically inactive fuel electrode regions to evaluate relative effects of electrochemical and chemical exposures. The 4-phase microstructural analysis showed that chemical exposure plays a significant role in loss of Ni percolation, especially in the support layer. Furthermore, Ni loss was observed to occur in both active and support layers.

固体氧化物电解电池（soec）为电网规模的储能和清洁制氢提供了有前途的解决方案，然而，Ni- ysz燃料电极的降解，主要是由于Ni渗透的损失，导致电池性能下降和电池寿命缩短。在这项研究中，开发了一种使用混合检测器信号的低压扫描电子显微镜（SEM）技术，通过对比在单个图像中分离出渗过的Ni，未渗过的Ni，孔隙和YSZ相。该技术用于研究Ni-YSZ燃料电极在800°C下SOEC运行500小时后的演变。在电化学活性和电化学非活性燃料电极区域研究了精细微结构活性层和部分直接相邻的粗微结构支撑层，以评估电化学和化学暴露的相对影响。四相显微结构分析表明，化学暴露对镍的渗透损失有显著影响，特别是在支撑层中。此外，在活性层和支撑层中均观察到镍的损失。

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引用次数: 0

The impact of electrolyser allocation on Great Britain's electricity transmission system in 2050 2050年电解槽配置对英国输电系统的影响

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.153097

Spyros Giannelos, Ioannis Konstantelos, Danny Pudjianto, Goran Strbac

Global initiatives to mitigate climate change have spurred significant interest in hydrogen electrolysers, prompting large‐scale deployment worldwide over the coming decades. In this context, this paper investigates the impact of electrolyser spatial distribution on Great Britain's electricity transmission system in the year 2050. Using a mixed-integer linear optimization model based on the Holistic Network Design framework, we conduct sensitivity analyses across six diverse electrolyzer allocation scenarios in which electrolyser capacities vary between 0 and 70 GW and are distributed differently in Great Britain's electricity system in 2050: a baseline without electrolysers connecting in 2050, a "Basic" case with 23 GW in 2050 distributed proportionally to regional demand, a scenario with 70 GW distributed across onshore GB, a case where 23 GW is connected only in Scotland, a "Mixed" onshore-offshore configuration with 60 % offshore and 40 % onshore, and a case where 23 GW is concentrated in southern England. Results demonstrate that electrolyser placement significantly impacts transmission investment needs, with total boundary reinforcements varying from 148 GW to 298 GW across scenarios, and total system costs ranging from £4,160.8 million to £6,242 million for year 2050 (discounted to 2030). Strategic placement near renewable sources can reduce system costs by up to 28 % while producing identical hydrogen volumes, as demonstrated by the "All in Scotland" and "All in South" scenarios. This research provides critical insights for policymakers and system planners by highlighting the complex interdependencies between electrolyser allocation and electricity transmission planning for Great Britain's future energy landscape.

缓解气候变化的全球倡议激发了人们对氢电解槽的极大兴趣，推动了未来几十年在全球范围内的大规模部署。在此背景下，本文研究了2050年电解槽空间分布对英国输电系统的影响。使用基于整体网络设计框架的混合整数线性优化模型，我们对六种不同的电解槽分配方案进行了敏感性分析，其中电解槽容量在0到70吉瓦之间变化，并且在2050年英国电力系统中分布不同：2050年没有电解槽连接的基线，2050年23吉瓦按区域需求比例分配的“基本”情况，70吉瓦分布在陆上GB的情况，23吉瓦仅在苏格兰连接的情况，“混合”陆上-海上配置，60%海上和40%陆上，以及23吉瓦集中在英格兰南部的情况。结果表明，电解槽的放置对输电投资需求有显著影响，在不同情况下，总边界增建从148吉瓦到298吉瓦不等，2050年（折扣到2030年）的总系统成本从41.608亿英镑到62.42亿英镑不等。正如“全苏格兰”和“全南方”方案所证明的那样，在可再生能源附近的战略布局可以在产生相同氢气量的情况下降低高达28%的系统成本。这项研究为政策制定者和系统规划者提供了重要的见解，强调了英国未来能源格局中电解槽分配和电力传输规划之间复杂的相互依赖关系。

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引用次数: 0

Impact of hydrogen and vacancy on the properties of Fe–Cr–Ni austenitic alloys using machine learning potential 利用机器学习势研究氢和空位对Fe-Cr-Ni奥氏体合金性能的影响

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.153089

Shiqiang Hao , Michael C. Gao

Austenitic stainless steels based on the Fe–Cr–Ni alloy system are widely used in industrial applications due to their high strength, good ductility, and exceptional resistance to corrosion, oxidation, and hydrogen embrittlement. Understanding how hydrogen and vacancies influence key mechanical and thermophysical properties such as strength, elastic behavior, and thermal expansion is vital for improving the performance and durability of these materials. In this study, we first present a computational approach that integrates a machine learning (ML) interatomic potential with grand canonical Monte Carlo simulations to explore fundamental characteristics like hydrogen solubility and vacancy concentrations in stainless steels. Our results reveal that hydrogen solubility decreases while vacancy concentration increases with increasing temperature. Building on these findings, molecular dynamics simulations are then employed to accurately assess the impact of hydrogen and vacancies on elastic and thermal properties, including the coefficient of thermal expansion, elastic moduli, and stacking fault energy. The analyses demonstrate that hydrogen stabilizes vacancies and vacancies trap hydrogen and thus contribute to the degradation of these key material properties. The present simulations show that the presence of hydrogen increases the vacancy concentration by almost two orders of magnitude for Fe_0·7Cr_0·19Ni_0.11 at 900 K 100 atm, and lowers both unstable and stable stacking fault energy for the alloy. This thermodynamic investigation offers a practical framework for unraveling the complex mechanisms of hydrogen-induced embrittlement, serving as a foundation for further studies that incorporate kinetic effects and dynamic behaviors. The combined methodology delivers comprehensive insights into how hydrogen and vacancies interact within Fe–Cr–Ni stainless steels, supporting research efforts to enhance alloy design and reliability in demanding industrial environments.

基于Fe-Cr-Ni合金体系的奥氏体不锈钢由于其高强度，良好的延展性以及优异的抗腐蚀，抗氧化和抗氢脆性而广泛应用于工业应用。了解氢和空位如何影响关键的机械和热物理性能，如强度、弹性行为和热膨胀，对于提高这些材料的性能和耐久性至关重要。在这项研究中，我们首先提出了一种计算方法，该方法将机器学习（ML）原子间势与大规范蒙特卡罗模拟相结合，以探索不锈钢中的氢溶解度和空位浓度等基本特征。结果表明，随着温度的升高，氢溶解度降低，空位浓度增加。在这些发现的基础上，分子动力学模拟被用来准确地评估氢和空位对弹性和热性能的影响，包括热膨胀系数、弹性模量和层错能。分析表明，氢稳定了空位，空位捕获了氢，从而导致了这些关键材料性能的退化。模拟结果表明，在900 k100 atm下，氢的存在使Fe0·7Cr0·19Ni0.11的空位浓度提高了近两个数量级，降低了合金的不稳定和稳定层错能。这项热力学研究为揭示氢致脆化的复杂机制提供了一个实用的框架，为进一步研究动力学效应和动力学行为奠定了基础。该组合方法提供了对Fe-Cr-Ni不锈钢中氢和空位如何相互作用的全面见解，支持研究工作，以提高苛刻工业环境下的合金设计和可靠性。

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引用次数: 0

Multi-objective optimization of embedded multi-tube metal hydride hydrogen tank for vehicles 车用嵌入式多管金属氢化物储氢罐多目标优化

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.152984

Mohit B. Bhore , Pratibha Sharma

Metal hydride (MH) systems have been recognized as safe, compact, and relatively low-energy-intensive solutions for hydrogen storage; however, their adoption in vehicular applications remains limited by slow refueling and low gravimetric capacity. The present study provides a comprehensive numerical investigation of an embedded tube metal hydride (MH) tank aimed at enhancing refueling performance and minimizing system weight through optimizing geometric and thermal design. The effects of tube diameter (6–20 mm), tank length (350–1750 mm), heat transfer coefficient (200–3500 W m⁻² K⁻¹), and tube pitch pattern (circumferential, triangular, and square) were systematically examined using COMSOL Multiphysics®. Results show that enhancing the heat transfer coefficient beyond 2000 W m⁻² K⁻¹ has a negligible effect on refueling time. Larger tube diameters (6–18 mm) and longer tanks (350–1500 mm) reduced refueling time by up to 53.67 % and 83.7 %, respectively; however, this was accompanied by an increase in tank weight. Among the studied tube pitch patterns, the circumferential pattern provided the most uniform temperature distribution. It achieved 22.18 % and 16.19 % faster refueling time than the triangular and square patterns, respectively, for an optimized geometric configuration (tube outer diameter: 8 mm and length: 1000 mm). Multi-objective weighted-sum and Pareto optimizations identified the optimal trade-offs between refueling time and system weight, with the optimized configuration achieving sub-3-minute refueling for practical vehicular applications.

金属氢化物（MH）系统被认为是安全、紧凑、相对低能耗的储氢解决方案；然而，它们在车辆应用中的采用仍然受到缓慢的加油和低重量容量的限制。本文对一种嵌入式管式金属氢化物（MH）储罐进行了全面的数值研究，旨在通过优化几何和热设计来提高加氢性能并使系统重量最小化。使用COMSOL Multiphysics®系统地检查了管径（6-20 mm）、槽长（350-1750 mm）、传热系数（200-3500 W m−2 K−1）和管间距模式（周向、三角形和正方形）的影响。结果表明，将换热系数提高到2000 W m−2 K−1以上对换料时间的影响可以忽略不计。更大的管道直径（6-18毫米）和更长的油箱（350-1500毫米）分别减少了53.67%和83.7%的加油时间；然而，这伴随着坦克重量的增加。在所研究的管间距模式中，周向模式的温度分布最均匀。在优化的几何结构（管外径为8毫米，长度为1000毫米）下，它的加油时间分别比三角形和方形模式快22.18%和16.19%。多目标加权和和和Pareto优化确定了加油时间和系统重量之间的最佳权衡，优化后的配置实现了实际车辆应用的加油时间低于3分钟。

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引用次数: 0

Optimal scheduling of an integrated electricity-hydrogen-heat energy system considering electrolyzer flexibility and demand response 考虑电解槽灵活性和需求响应的电-氢-热一体化系统优化调度

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.152845

Minghua Liu , Xiang Zhang , Yuan Zhao , Yangyiming Rong , Shunyi Chen , Xiang Gao

This study develops an optimal scheduling model for an electricity-hydrogen-heat integrated energy system (EHH-IES), featuring detailed electrolyzer operation characteristics and multi-dimensional demand response mechanisms. The model captures the flexible response of electrolyzer arrays to dynamic load conditions and introduces temporal and spatial load adaptability through shiftable and substitutable electric and thermal demands. By minimizing the total operating cost under multi-energy coupling and operational constraints, the model ensures coordinated energy supply and demand. Calculation results over a 24-h horizon indicate that the proposed strategy achieves a 17.6 % reduction in total operating cost compared to a benchmark scenario without demand response or electrolyzer flexibility. The results demonstrate the model's effectiveness in enhancing economic efficiency and system flexibility under fluctuating renewable generation and complex load patterns.

建立了具有详细电解槽运行特征和多维需求响应机制的电-氢-热一体化能源系统（EHH-IES）最优调度模型。该模型捕捉了电解槽阵列对动态负载条件的灵活响应，并通过可移动和可替代的电和热需求引入了时间和空间负载适应性。该模型通过在多能耦合和运行约束下最小化总运行成本，保证了能源供需协调。24小时的计算结果表明，与没有需求响应或电解槽灵活性的基准方案相比，所提出的策略可以降低17.6%的总运营成本。结果表明，该模型能够有效地提高可再生能源发电波动和复杂负荷模式下的经济效率和系统灵活性。

引用次数: 0

Degradation modelling and the impact of intermittent operation on proton exchange membrane electrolyzers 质子交换膜电解槽间歇运行的降解模型及影响

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.152962

Portia Minnah, Kevin Pope

This paper investigates membrane thinning with fluoride release rate as the indicator for chemical degradation in PEM electrolyzers when coupled with intermittent energy sources. Continuous and intermittent operating scenarios are modelled to predict and compare chemical degradation over long-term operation. Predicted degradation is less for continuous operation (with a rate of 2.69 nm h⁻¹), whereas intermittent operation increases the predicted degradation rate to 5.86 nm h⁻¹. Four distinct intermittency patterns over a 48-h period are also investigated, highlighting the role of downtime and scheduling on degradation. Results indicate that differences in cumulative degradation are primarily determined by the length and sequencing of OFF periods. The results provide insights into operational strategies, indicating that accounting for electrolyzer performance degradation in operational planning can mitigate degradation and improve performance in intermittent renewable energy applications.

本文以氟离子释放率作为PEM电解槽中化学降解的指标，研究了间歇能源对膜减薄的影响。对连续和间歇操作情景进行建模，以预测和比较长期操作过程中的化学降解。连续操作预测的降解率较低（为2.69 nm h−1），而间歇操作将预测的降解率提高到5.86 nm h−1。还研究了48小时内的四种不同的间歇模式，突出了停机时间和调度对退化的作用。结果表明，累积降解的差异主要取决于OFF周期的长度和顺序。研究结果为运营策略提供了见解，表明在运营计划中考虑电解槽性能退化可以减轻退化并提高间歇性可再生能源应用的性能。

引用次数: 0

Dynamics of the transition between stabilization regimes of H2/air dual swirl flames at elevated pressure 高压下H2/空气双旋流火焰稳定化过渡的动力学研究

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2025-12-19 DOI: 10.1016/j.ijhydene.2025.153104

Sylvain Marragou , Thibault F. Guiberti

Hydrogen is a promising fuel for low-carbon combustion systems. Yet, its stabilization dynamics under elevated pressures remain poorly understood. This study examines the transition between attached and lifted regimes in dual-swirl partially premixed H

_{2}

/air flames using high-speed OH-PLIF and 2D Raman diagnostics. Three independent criteria consistently identify a smooth, hysteresis-free transition passing through an intermittent regime where the flame alternates between attachment and lift-off. Raman imaging reveals that attached flames confine the hydrogen jet, while lifted flames promote radial expansion and enhanced premixing. Comparing the mean stabilization (attached and lifted) durations with the convective time scale shows that the flame remains in its current regime when the stabilization time exceeds the flow timescale across the flame. These results provide new insight into hydrogen flame stabilization mechanisms at elevated pressure and support the design of future hydrogen-fueled combustors.

氢是一种很有前途的低碳燃烧系统燃料。然而，它在高压下的稳定动力学仍然知之甚少。本研究使用高速OH-PLIF和二维拉曼诊断技术研究了双旋部分预混H2/空气火焰中附著和提升状态之间的转变。三个独立的标准一致地确定了一个平稳的、无迟滞的过渡，通过间歇状态，火焰在附着和起飞之间交替。拉曼成像显示，附着的火焰限制了氢射流，而上升的火焰促进了径向膨胀和增强了预混。将平均稳定化（附着和提升）持续时间与对流时间尺度进行比较表明，当稳定化时间超过火焰的流动时间尺度时，火焰保持在其当前状态。这些结果为高压下氢火焰稳定机制提供了新的见解，并为未来氢燃料燃烧器的设计提供了支持。

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引用次数: 0