International Journal of Hydrogen Energy最新文献_第6页

Study on the influence mechanism of fin structure on the filling performance of cold adsorption hydrogen storage tank 翅片结构对冷吸附式储氢罐填充性能的影响机理研究

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.130

Jiahao Wang , Daniele Melideo , Lorenzo Ferrari , Paolo Taddei Pardelli , Umberto Desideri

{"title":"Study on the influence mechanism of fin structure on the filling performance of cold adsorption hydrogen storage tank","authors":"Jiahao Wang , Daniele Melideo , Lorenzo Ferrari , Paolo Taddei Pardelli , Umberto Desideri","doi":"10.1016/j.ijhydene.2024.11.130","DOIUrl":"10.1016/j.ijhydene.2024.11.130","url":null,"abstract":"<div><div>Activated carbon cold adsorbed H<sub>2</sub> storage (CAH2) is a promising physical hydrogen storage method. However, conventional storage tanks face problems of local high heat accumulation during the cold adsorption process, leading to low hydrogen storage efficiency and capacity. This study attempts to design high thermal conductivity fins to a conventional CAH2 tank to enhance heat and mass transfer, thereby promoting the hydrogen adsorption process. An accurate mathematical model and finite element method are established to calculate the CAH2 process. The influence mechanism of different fin arrangements, fin length, fin number (spacing), and fin width on the temperature field, adsorption concentration field and storage performance are explored. The results show that adding fins can effectively promote heat transfer and suppress local high temperature and low adsorption concentration areas. When the adsorption mass reaches 0.05 kg, the storage efficiency of the three tank schemes with added fins improves by approximately 40% compared with the original tank. Although extending the fin length will enhance heat conduction, it will also suppress the heat convective transfer effect. The optimal fin length is found to be 30 mm. Increasing the number of fins (reducing spacing) can significantly decrease the areas of local high temperature and low adsorption concentration, but this beneficial effect diminished when the number of fins exceeded 14. Increasing the fin width has a weaker beneficial effect on the temperature field and adsorption concentration field, and also cause a significant reduction in the tank volume, thereby reducing the total hydrogen storage capacity. The findings of this study can provide important guidance for the application of high thermal conductivity fins in CAH2 tanks.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 897-911"},"PeriodicalIF":8.1,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning applications on proton exchange membrane water electrolyzers: A component-level overview 质子交换膜水电解器中的机器学习应用：组件级概述

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.11.188

Abdelmola Albadwi , Saltuk Buğra Selçuklu , Mehmet Fatih Kaya

{"title":"Machine learning applications on proton exchange membrane water electrolyzers: A component-level overview","authors":"Abdelmola Albadwi , Saltuk Buğra Selçuklu , Mehmet Fatih Kaya","doi":"10.1016/j.ijhydene.2024.11.188","DOIUrl":"10.1016/j.ijhydene.2024.11.188","url":null,"abstract":"<div><div>Machine Learning (ML) has emerged as a pivotal force in enhancing Proton Exchange Membrane Water Electrolyzer (PEMWE) devices. These devices are critical for transforming renewable electricity into hydrogen, a key clean energy vector. Despite their prospects, the broader implementation of PEMWE is hindered by cost and efficiency barriers. PEMWEs are inherently complex, involving multi-scale processes such as electrochemical reactions, reactant transportation, and thermo-electrical interactions. This complexity has previously limited optimizations to isolated components like electrocatalysts, membrane electrode assemblies (MEAs), Bipolar plates (BPs), and Gas Diffusion Electrodes (GDEs). ML presents a revolutionary pathway to address these obstacles by enabling system-wide optimization. In this paper, we offer an in-depth review of cutting-edge ML applications for improving PEMWE performance and efficiency. ML's ability to process large datasets and identify intricate patterns accelerates the research and development of PEMWEs, thereby reducing costs and boosting efficiency. We describe a variety of algorithms, such as Artificial Neural Networks (ANN), Deep Learning (DL), Long Short-Term Memory (LSTM), Support Vector Machine (SVM), Categorical Boosting (CatBoost), and Light Gradient Boosting Machine (LightGBM), commonly used in PEMWE applications, highlighting their significance in enhancing PEMWE systems. Additionally, we explore hybrid methods that combine various ML techniques to further improve PEMWE performance and efficiency. The review provides a concise overview and forward-looking perspective on the role of ML in advancing PEMWE technology, marking a significant step towards their cost-effective and scalable deployment.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 806-828"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical and experimental study on the effect of mechanical strain force activated polyhedron on oxygen evolution reaction performance and mechanism 机械应变力激活多面体对氧进化反应性能和机理影响的理论与实验研究

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.11.148

Hao Zhou , Le Chen , Guoyu Hou , Ping He , Xueyang Rui , Sorachon Yoriya , Zaiguo Fu , Peian Li , Kai Sheng , Kai Huang , Jiang Wu , Jia Lin

{"title":"Theoretical and experimental study on the effect of mechanical strain force activated polyhedron on oxygen evolution reaction performance and mechanism","authors":"Hao Zhou , Le Chen , Guoyu Hou , Ping He , Xueyang Rui , Sorachon Yoriya , Zaiguo Fu , Peian Li , Kai Sheng , Kai Huang , Jiang Wu , Jia Lin","doi":"10.1016/j.ijhydene.2024.11.148","DOIUrl":"10.1016/j.ijhydene.2024.11.148","url":null,"abstract":"<div><div>Developing cost-effective and high-performance electrocatalysts is crucial for overcoming the slow oxygen evolution reaction (OER) observed in the process of water splitting. Herein, an exquisite iron-cobalt bimetallic sulfide featuring exposing more crystal faces and stronger crystallinity is manipulated via a mechanical stress strategy, which may offer additional active sites for the OER process. Particularly, the prepared Fe<sub>0.5</sub>Co<sub>0.5</sub>/SNC exhibits notable OER activity, characterized by a low overpotential of 310 mV at a current density of 10 mA cm<sup>−2</sup> and a high current density of 131 mA/cm<sup>2</sup> at a voltage of 1.8 V (versus RHE). Additionally, post-stability tests analysis on the material revealed a reversible oscillation of iron and cobalt valence states between 2<sup>+</sup> and 3<sup>+</sup>, indicating the material's sensitivity to reactive oxygen species, which enhances its OER catalytic performance. The continuous adsorption and desorption of reaction intermediates with the material's matrix perpetually trigger the activation, maintaining the catalytic activity. Theoretical calculations suggest that orbital hybridization among iron, cobalt, and sulfur, along with an appropriate d-band center, enhance the electron exchange rate, facilitating the adsorption and dissociation of intermediates on the material, thereby promoting the OER process. Our findings provide new insights for the design and production of efficient, cost-effective OER electrocatalysts, contributing to the industrialization of OER catalysts.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 726-737"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring sustainable fuel alternatives: The role of NH3–H2–H2O2 blends in enhancing HCCI engine performance 探索可持续燃料替代品：NH3-H2-H2O2 混合物在提高 HCCI 发动机性能方面的作用

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.11.133

Mohamed I. Hassan Ali, Kabbir Ali

{"title":"Exploring sustainable fuel alternatives: The role of NH3–H2–H2O2 blends in enhancing HCCI engine performance","authors":"Mohamed I. Hassan Ali, Kabbir Ali","doi":"10.1016/j.ijhydene.2024.11.133","DOIUrl":"10.1016/j.ijhydene.2024.11.133","url":null,"abstract":"<div><div>This study presents a comprehensive computational analysis of Homogeneous Charge Compression Ignition (HCCI) engines fueled by a carbon-free blend of ammonia (NH<sub>3</sub>), hydrogen (H<sub>2</sub>), and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>). The research aims to explore the potential of this blend in enhancing combustion performance and reducing emissions, addressing the critical challenge of environmental sustainability in internal combustion engines. Through the use of detailed kinetic modeling and three-dimensional computational fluid dynamics (CFD), the impacts of various blend compositions on key engine performance was assessed. The kinetic model is validated with the published literature data. The findings indicate that the addition of H<sub>2</sub>O<sub>2</sub> significantly improves autoignition and the combustion duration of an NH<sub>3</sub>–H<sub>2</sub> blend in an HCCI engine is 17° at 515 K. However, with the addition of 40% H<sub>2</sub>O<sub>2</sub>, the combustion duration reduces to approximately 16°, even at lower temperatures (395 K). The introduction of 40% H<sub>2</sub>O<sub>2</sub> in the NH<sub>3</sub>–H<sub>2</sub> HCCI engine results in a 12.8% increase in output power and a 22.2% decrease in NO<sub>x</sub> emissions due to the reduced operating temperature under Maximum Brake Torque (MBT) conditions. With a fuel blend of NH<sub>3</sub>-0.7, H<sub>2</sub>-0.2, and H<sub>2</sub>O<sub>2</sub>-0.1 at an inlet temperature of 450 K, the combustion duration (CD) is 22°. Increasing hydrogen to 50% and reducing the inlet temperature to about 390 K decreases the CD to 5°. This study demonstrates that the NH<sub>3</sub>–H<sub>2</sub>–H<sub>2</sub>O<sub>2</sub> blend holds significant promise as a viable alternative to conventional fuels, potentially contributing to the advancement of zero-carbon emission combustion technologies in future transportation systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 782-794"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal design of a hydrogen supply chain taking into account economic costs, energy consumption, and carbon emissions-A case study of Shanghai, China 考虑经济成本、能源消耗和碳排放的氢气供应链优化设计--中国上海案例研究

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.11.041

Yining He , Jiaxuan Liu , Xingyu Deng , Yuehua Zhang , Tao Ma

{"title":"Optimal design of a hydrogen supply chain taking into account economic costs, energy consumption, and carbon emissions-A case study of Shanghai, China","authors":"Yining He , Jiaxuan Liu , Xingyu Deng , Yuehua Zhang , Tao Ma","doi":"10.1016/j.ijhydene.2024.11.041","DOIUrl":"10.1016/j.ijhydene.2024.11.041","url":null,"abstract":"<div><div>The problem of global warming is becoming more and more serious, and effective reduction of carbon dioxide emissions has become a focus of attention for countries around the world. In the field of transportation, hydrogen-powered heavy-duty trucks are expected to replace traditional trucks with their low carbon emissions and environmental advantages. Building a hydrogen supply chain optimization model that takes complex urban road conditions and hydrogen data into account can increase economic benefits while reducing carbon emissions. However, such models face challenges of objective optimization and lack of case data. Here, we develop a mixed-integer linear model using a bi-objective optimization approach and an extended ε-constraint approach to optimize the cost, energy consumption, and carbon emissions at different stages of the hydrogen supply chain. The model we developed further reduces the computational complexity while satisfying the 3-objective optimization. In addition, for the first time, we bring the actual data of Shanghai, China into the model to obtain the optimized hydrogen supply chain including the optimal hydrogen station construction and the optimal hydrogen transportation path. Our model provides guidance and inspiration for future hydrogen supply chain optimization in cities with complex transportation environments.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 795-805"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iron-containing sulfur/nitrogen co-doped porous carbons via composite salt modification to promote the oxygen reduction catalysis 通过复合盐改性促进氧还原催化的含铁硫氮共掺多孔碳

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.11.151

Chenyang Shu , Xinru Xu , Jianglin Chen , Hongdian Chen , Jinyan Wu , Rong Jin , Yao Liu , Chaozhong Guo , Chuanlan Xu , Yujun Si

{"title":"Iron-containing sulfur/nitrogen co-doped porous carbons via composite salt modification to promote the oxygen reduction catalysis","authors":"Chenyang Shu , Xinru Xu , Jianglin Chen , Hongdian Chen , Jinyan Wu , Rong Jin , Yao Liu , Chaozhong Guo , Chuanlan Xu , Yujun Si","doi":"10.1016/j.ijhydene.2024.11.151","DOIUrl":"10.1016/j.ijhydene.2024.11.151","url":null,"abstract":"<div><div>Carbon materials with high micropore volume and great specific surface area (SSA) are developed as catalysts for oxygen reduction reaction. Sodium lignosulfonate was used as the primary starting material for effectively doping of iron and nitrogen using ferric chloride hexahydrate and melamine, capitalizing on its robust coordination characteristics. The influences of the magnesium oxide template and composite salt etching on the pore structure and catalytic performance are comprehensively investigated. Modulation of MgO template and composite salt during high-temperature pyrolysis produces the catalyst (Fe-NS-PC) with a hierarchical porous structure and a 1699 m<sup>2</sup> g<sup>−1</sup> of specific surface area. It promotes the exposure of active sites, and mobility of reactants and products during oxygen reduction process. Thus, the Fe-NS-PC catalyst possess an oxygen reduction reaction (ORR) activity (<em>E</em><sub>1/2</sub> = 0.865 V <em>vs</em>. RHE) in alkaline medium, being similar to the Pt/C catalyst. In zinc-air battery (ZAB) testing, the specific energy density is reduced by 6% after ∼120 h of uninterrupted discharge when the negative zinc foil is substituted, demonstrating the exceptional stability. This work presents a practical guide for the subsequent modification of carbon materials using template and composite salts modification.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 716-725"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Technical and economic analysis of hydrogen production, storage and transportation by offshore wind power in different scenarios: A Guangdong case study 不同情况下海上风电制氢、储氢和运氢的技术和经济分析：广东案例研究

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.10.346

Chao Zhang, Pengfei Song, Jianguo Hou, Li Xiao, Xiukang Wang, Fan Yang, Xiulin Wang

{"title":"Technical and economic analysis of hydrogen production, storage and transportation by offshore wind power in different scenarios: A Guangdong case study","authors":"Chao Zhang, Pengfei Song, Jianguo Hou, Li Xiao, Xiukang Wang, Fan Yang, Xiulin Wang","doi":"10.1016/j.ijhydene.2024.10.346","DOIUrl":"10.1016/j.ijhydene.2024.10.346","url":null,"abstract":"<div><div>Hydrogen production from offshore wind power is one of the ways to solve the problem of consumption. Through the comparative analysis of electrolytic, hydrogen storage and transportation technology suitable for offshore wind, taking an offshore wind farm in eastern Guangdong province of China as an example, according to four cases of high-voltage AC transmission, onshore centralized hydrogen production, offshore centralized hydrogen production + submarine hydrogen pipeline transportation, offshore centralized hydrogen production + LOHC-FPSO + ship transportation, the economy of each case is analyzed under different offshore distances and different hydrogen prices, and it is concluded that the cost of offshore wind power is very sensitive to offshore distance. In that three hydrogen production cases, under the condition that the price of hydrogen is 25 CNY/kg, when the offshore distance exceeds about 180 km, it is difficult to make profits, and it is not suitable for hydrogen production. When the offshore distance is less than 80 km, offshore wind power has more advantages in producing hydrogen on land. When the offshore distance exceeds about 80 km, case 3 is lower. When the offshore distance exceeds about 150 km, case 2 and case 3 will be superior to the case 1. When the benchmark hydrogen price is 25 CNY/kg, the economy of each case is poor.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 829-837"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-performance overall water electrolysis enabled by a one-step fabricated bifunctional Pt/NiFe LDH catalyst on iron nickel foam 在铁镍泡沫上一步制备双功能 Pt/NiFe LDH 催化剂，实现高性能整体电解水

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.10.407

Changhui Liang , Yuxin Zhang , Jun Shen , Xiaoqiang Zhang , Huixiang Li , Songhai Xie , Yongxin Li , Z. Conrad Zhang

{"title":"High-performance overall water electrolysis enabled by a one-step fabricated bifunctional Pt/NiFe LDH catalyst on iron nickel foam","authors":"Changhui Liang , Yuxin Zhang , Jun Shen , Xiaoqiang Zhang , Huixiang Li , Songhai Xie , Yongxin Li , Z. Conrad Zhang","doi":"10.1016/j.ijhydene.2024.10.407","DOIUrl":"10.1016/j.ijhydene.2024.10.407","url":null,"abstract":"<div><div>The development of bifunctional electrocatalysts with high efficiency for overall water splitting is still a challenging task. In this work, we introduce a novel one-step synthesis method for Pt/NiFe layered double hydroxide (LDH) on an iron-nickel foam (INF) substrate under mild conditions. This method eliminates the need for additional Ni or Fe ions and facilitates in-situ etching and growth processes under mild conditions, resulting in a higher active surface area, well-dispersed low-loading Pt nanoparticles, and a self-supported electrode without binders. These features collectively enhance electron transfer and catalytic activity for both HER and OER. The Pt/NiFe LDH/INF exhibits remarkable water splitting performance, requiring a cell voltage of only 1.44 V at10 mA cm<sup>−2</sup> when used as both anode and cathode. Additionally, it remains stable at 20 mA cm<sup>−2</sup> for at least 16 h. The exceptional water splitting activity of Pt/NiFe LDH/INF in alkaline solution can be attributed to the synergistic effects of Pt and NiFe LDH, which improve the hydrogen evolution reaction and oxygen evolution reaction efficiencies. The results provide valuable insights into designing bifunctional electrocatalysts with low Pt loading for optimal water splitting performance at low operating cost.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 749-755"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of superhydrophobic TiN-coated SS304 flow field plates via femtosecond laser processing for fuel cell applications 通过飞秒激光加工制造用于燃料电池的超疏水 TiN 涂层 SS304 流场板

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.11.165

Nitika Devi , Chan-Ray Su , Amornchai Arpornwichanop , Yong-Song Chen

{"title":"Fabrication of superhydrophobic TiN-coated SS304 flow field plates via femtosecond laser processing for fuel cell applications","authors":"Nitika Devi , Chan-Ray Su , Amornchai Arpornwichanop , Yong-Song Chen","doi":"10.1016/j.ijhydene.2024.11.165","DOIUrl":"10.1016/j.ijhydene.2024.11.165","url":null,"abstract":"<div><div>Fuel cell systems are potential power sources for transportation applications due to their high energy efficiency, rapid start-up, and low emissions. The bipolar plates, which constitute the major volume of the fuel cell stack, are usually made of graphite. However, the brittle nature of graphite plates makes them unable to resist shock or vibration; as a result, metallic plates are considered as bipolar plates in fuel cell stacks due to their resistance to impact, strength, and cost-effective manufacturing. However, surface corrosion and hydrophobicity are significant challenges that need to be overcome in the fuel cell working environment. In this study, the resistance of SS304 plates to the electrochemical environment is enhanced by coating them with TiN, while the hydrophobic surface of the stainless steel is induced using femtosecond lasers and vacuum treatments. The effects of treatment conditions on surface morphology, contact angle, interfacial resistance, and fuel cell performance are investigated. Results show that linearly polarized lasers with scanning speeds of 20 mm s<sup>−1</sup> and 80 mm s<sup>−1</sup> are the optimum treatments for SS304 and TiN-coated SS304 plates, respectively. The TiN coating greatly improves the performance of SS304 flow field plates, with a maximum power density of 0.9 W cm<sup>−2</sup> compared to 0.44 W cm<sup>−2</sup> without the coating. Fuel cells consisting of laser-processed TiN-coated SS304 flow field plates can also operate durably with hydrogen and oxygen at the anode and cathode, respectively.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 738-748"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of impurities in hydrate formation in H2 pipelines 杂质对 H2 管道中水合物形成的影响

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI: 10.1016/j.ijhydene.2024.11.030

Abbas Rajaei, Nejat Rahmanian

{"title":"Influence of impurities in hydrate formation in H2 pipelines","authors":"Abbas Rajaei, Nejat Rahmanian","doi":"10.1016/j.ijhydene.2024.11.030","DOIUrl":"10.1016/j.ijhydene.2024.11.030","url":null,"abstract":"<div><div>The production of hydrogen as an alternative fuel for combating climate change has been promoted recently during the current energy transition. However, hydrogen, whether blue or green, brown, etc, often involves impurities, potentially leading to gas hydrate formation in transmission pipelines. This study investigates the impact of common impurities, such as CH<sub>4</sub>, C<sub>2</sub>H<sub>6</sub>, C<sub>3</sub>H<sub>8</sub>, and CO<sub>2</sub>, on gas hydrate formation in hydrogen-rich pipelines, crucial for ensuring safe operations. Gas hydrates, notorious for causing high risks of blockages in oil and gas pipelines, pose higher risks in hydrogen pipelines, potentially leading to downtime and economic losses. This work predicts hydrate formation under varying conditions using two different simulation software Aspen HYSYS (v.14) and HydraFlash (v.3.5.8). Results reveal that H<sub>2</sub>S, C<sub>3</sub>H<sub>8</sub>, and C<sub>2</sub>H<sub>6</sub> notably influence hydrate phase curves, respectively, shifting them to higher temperatures. Notably, Aspen HYSYS exhibits stronger correlations with experimental data for multicomponent systems with high hydrogen concentrations. This study underscores the importance of understanding hydrate formation risks in hydrogen pipelines and provides valuable insights for their safe operation and maintenance.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"94 ","pages":"Pages 765-773"},"PeriodicalIF":8.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657204","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}

引用次数: 0