International Journal of Hydrogen Energy最新文献

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Dual-function hydrogen selective catalytic reduction (H2-SCR): enabling NOx reduction to ammonia synthesis 双功能氢选择性催化还原(H2-SCR):使NOx还原为氨合成
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-07-01 DOI: 10.1016/j.ijhydene.2025.150183
Mehak Nawaz Khan , Dengchao Peng , Shouyi Hu , Xusheng Wang , Xi Lin , Lupeng Han , Zhigang Hu , Jianxin Zou , Dengsong Zhang
{"title":"Dual-function hydrogen selective catalytic reduction (H2-SCR): enabling NOx reduction to ammonia synthesis","authors":"Mehak Nawaz Khan ,&nbsp;Dengchao Peng ,&nbsp;Shouyi Hu ,&nbsp;Xusheng Wang ,&nbsp;Xi Lin ,&nbsp;Lupeng Han ,&nbsp;Zhigang Hu ,&nbsp;Jianxin Zou ,&nbsp;Dengsong Zhang","doi":"10.1016/j.ijhydene.2025.150183","DOIUrl":"10.1016/j.ijhydene.2025.150183","url":null,"abstract":"<div><div>This review explores the growing promise of hydrogen-selective catalytic reduction (H<sub>2</sub>-SCR) as a dual-function technology for efficient NO<sub>x</sub> mitigation and sustainable ammonia (NH<sub>3</sub>) synthesis. Beyond its exceptional NO<sub>x</sub> conversion efficiency and minimal byproduct formation, H<sub>2</sub>-SCR offers a novel route for green NH<sub>3</sub> generation via catalytic pathways that utilize renewable hydrogen. This emerging strategy challenges the conventional energy-intensive Haber-Bosch process by enabling decentralized and low-carbon NH<sub>3</sub> production under in situ reaction conditions. The review presents an in-depth analysis of the fundamental principles of H<sub>2</sub>-SCR, recent advancements in catalyst design, key operational factors, and integration with existing emission control systems. Particular focus is given to the mechanistic insights underpinning NH<sub>3</sub> formation during NO<sub>x</sub> reduction, emphasizing its role in circular nitrogen management. By aligning environmental remediation with sustainable fertilizer production, H<sub>2</sub>-SCR positions itself as a transformative solution in the context of global decarbonization goals and future green ammonia technologies.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"151 ","pages":"Article 150183"},"PeriodicalIF":8.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517810","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
Laser pyrolysis of biomass: Comparing cellulose-rich and lignin-rich feedstocks for hydrogen rich-gas production 生物质激光热解:比较富纤维素和富木质素原料生产富氢气体
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-07-01 DOI: 10.1016/j.ijhydene.2025.150131
Abderrahman Mellalou , Abderrahman Khorssa , Hubert H. Girault , Abdelkader Outzourhit , Fouad Ghamouss
{"title":"Laser pyrolysis of biomass: Comparing cellulose-rich and lignin-rich feedstocks for hydrogen rich-gas production","authors":"Abderrahman Mellalou ,&nbsp;Abderrahman Khorssa ,&nbsp;Hubert H. Girault ,&nbsp;Abdelkader Outzourhit ,&nbsp;Fouad Ghamouss","doi":"10.1016/j.ijhydene.2025.150131","DOIUrl":"10.1016/j.ijhydene.2025.150131","url":null,"abstract":"<div><div>The increasing global demand for sustainable energy solutions necessitates innovative approaches to hydrogen production. This study investigates the use of laser pyrolysis as a rapid and efficient method for converting biomass into hydrogen-rich gas, biochar, and bio-oil. Olive stones and onion post-harvest waste were chosen as feedstocks due to their abundance, low cost, and distinct chemical compositions. Experiments were conducted under varying laser power levels (25 %, 50 %, and 100 %), from a continuous wave CO<sub>2</sub> laser to achieve high heating rates and rapid decomposition. Comprehensive analyses, including FTIR, GC-MS, and Raman spectroscopy, were employed to characterize the products. The results revealed that hydrogen yield increased with increasing laser power for both biomass samples. Notably, the hydrogen yield was significantly higher for onion waste compared to olive stones, primarily due to the lower cellulose and hemicellulose content in olive stones. The general trend observed for this yield was: Biomass<sub>100 % power</sub> &gt; Biomass<sub>50 % power</sub> &gt; Biomass<sub>25 % power</sub>. Specifically, Hydrogen (H<sub>2</sub>) was the dominant component for onion waste, with its concentration increasing from 31.50 % at 25 % power to 36.18 % at 100 % power, and olive stones exhibited lower hydrogen production, with H<sub>2</sub> concentrations increasing modestly from 14.31 % at 25 % power to 15.78 % at 100 % power. Moreover, the hydrogen yield for onion waste at 100 % power reached 177.72 L/kg, substantially higher than that of olive stones at 100 % power, which yielded 49.78 L/kg. Furthermore, onion waste produced biochar with a more porous structure compared to olive stones. The gaseous products, predominantly hydrogen and methane, showed significant tunability based on feedstock and laser power, highlighting the flexibility of this technique for targeted product optimization. This study reveals the potential of laser pyrolysis as a transformative technology for biomass valorization, offering a sustainable pathway for hydrogen rich-gas production and co-generation of value-added products.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"151 ","pages":"Article 150131"},"PeriodicalIF":8.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517353","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
Techno-economic and GIS mapping of wind-driven hydrogen production in Portugal 葡萄牙风力制氢的技术经济和GIS制图
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-07-01 DOI: 10.1016/j.ijhydene.2025.150157
Mohammed Attiaoui , Salah Eddine Amrani , Hugo Gonçalves Silva , Jorge Neto , Ahmed Alami Merrouni
{"title":"Techno-economic and GIS mapping of wind-driven hydrogen production in Portugal","authors":"Mohammed Attiaoui ,&nbsp;Salah Eddine Amrani ,&nbsp;Hugo Gonçalves Silva ,&nbsp;Jorge Neto ,&nbsp;Ahmed Alami Merrouni","doi":"10.1016/j.ijhydene.2025.150157","DOIUrl":"10.1016/j.ijhydene.2025.150157","url":null,"abstract":"<div><div>The objective of this study is to evaluate the potential of the wind driven-hydrogen production in mainland Portugal from both technical and economic aspects and to create a hydrogen-wind atlas to support decision making for stakeholders and governmental organizations. To this end, large spatial-temporal and high precision wind measurements were gathered from 88 in-situ meteorological stations, strategically distributed locations across the country. These data were used as input to simulate the electricity and hydrogen production from a 20 MWe wind farm. The simulation results were interpolated using GIS tools to create the first comprehensive atlas of hydrogen production in Portugal. Results show that hydrogen production costs revealed promising results, with an LCOH<sub>2</sub> in the best performing regions of around 3.258 €/kg and a yearly total production capacity reaching 2256 tons (with a specific production of 113 kg/kWh/year). These outcomes demonstrate the viability of implementing wind farm-electrolyzer systems for hydrogen production in Portugal and highlight the country's strong potential for both energy export and domestic use.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"151 ","pages":"Article 150157"},"PeriodicalIF":8.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517406","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
Development and thermodynamic analysis of a low-carbon power and synthetic natural gas co-generation plant driven by hybrid biomass-solar energy 生物质-太阳能混合能源驱动的低碳电力与合成天然气热电联产装置的开发与热力学分析
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-07-01 DOI: 10.1016/j.ijhydene.2025.06.156
M. Kouchakkhan, V. Zare, L. Garousi Farshi
{"title":"Development and thermodynamic analysis of a low-carbon power and synthetic natural gas co-generation plant driven by hybrid biomass-solar energy","authors":"M. Kouchakkhan,&nbsp;V. Zare,&nbsp;L. Garousi Farshi","doi":"10.1016/j.ijhydene.2025.06.156","DOIUrl":"10.1016/j.ijhydene.2025.06.156","url":null,"abstract":"<div><div>An innovative low-carbon system based on gasification of wood and solar energy is proposed and analyzed for co-generation of power and synthetic natural gas. Produced synthetic fuel can be directly injected into the natural gas grid or utilized as a promising energy carrier in order to save surplus power to overcome the problem of intermittent nature of generated power by solar energy. The integrated system comprises an externally fired gas turbine cycle, a regenerative steam Rankine cycle, an organic Rankine cycle, proton exchange membrane electrolyzer, methane synthesis unit and photovoltaic solar system. Thermodynamic models are developed to evaluate system proficiency from energy, exergy, and environmental perspectives. Synthetic fuel production rate is evaluated in two different scenarios (solar supported and non-solar supported) under five electrolyzer operating loads as green hydrogen route. when 10 % of the power is allocated to produce the hydrogen required for the methanation process, overall exergy efficiency is obtained 39.19 % and 42.12 % for the solar energy scenarios, respectively. In this case, 1021 t/yr CO<sub>2</sub> is utilized by the solar supported system to produce 380.5 t/yr synthetic fuel with sustainability index of 1.645 while, 804.7 t/yr CO<sub>2</sub> utilized by the non-solar supported system to produce 299.8 t/yr synthetic fuel with sustainability index of 1.728. According to the Sankey diagram, externally fired gas turbine cycle is the primary source of thermodynamic inefficiency, with the gasification unit being the most exergy destructive component.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"151 ","pages":"Article 149966"},"PeriodicalIF":8.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517351","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
Metabolic engineering of Clostridium pasteurianum for enhanced biohydrogen production 巴氏梭菌的代谢工程促进生物制氢
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-07-01 DOI: 10.1016/j.ijhydene.2025.150161
Zhong Li , Jiajie He , Shanshan Zhang , Zhangzhang Xie , Ziyuan Guo , Weijia Geng , Yongqiang Fan , Fanghua Liu , Dake Xu
{"title":"Metabolic engineering of Clostridium pasteurianum for enhanced biohydrogen production","authors":"Zhong Li ,&nbsp;Jiajie He ,&nbsp;Shanshan Zhang ,&nbsp;Zhangzhang Xie ,&nbsp;Ziyuan Guo ,&nbsp;Weijia Geng ,&nbsp;Yongqiang Fan ,&nbsp;Fanghua Liu ,&nbsp;Dake Xu","doi":"10.1016/j.ijhydene.2025.150161","DOIUrl":"10.1016/j.ijhydene.2025.150161","url":null,"abstract":"<div><div>Biohydrogen offers a promising, eco-friendly, and efficient approach to hydrogen production. Metabolic engineering of <em>Clostridium pasteurianum</em> DSM525, a promising biohydrogen-producing strain, is essential to enhance hydrogen yield for practical applications. To overcome the low transformation efficiency, we optimized DNA dosage, methylation, and ultrasound-assisted electroporation, achieving 7.5 × 10<sup>2</sup> CFU/μg DNA—sufficient for genetic engineering. Tunable regulation of hydrogenase was achieved for the first time using a newly constructed expression plasmid, and overexpression of endogenous hydrogenase genes (<em>C00280</em>, C37830, <em>C07060-70</em>, <em>RS16520</em>) significantly enhanced hydrogen production. The optimal additive mix, 25 ppm Fe<sub>3</sub>O<sub>4</sub> nanoparticles, 70 ppm riboflavin, 25 ppm humic acid, 40 ppm Ni<sup>2+</sup>, and 50 ppm Fe<sup>2+</sup>, enhanced hydrogen metabolism. Under these conditions, <em>C. pasteurianum</em> overexpressing hydrogenases C00280 and RS16520 showed the highest hydrogen accumulation amount, with 6.18- and 6.87-fold increases over the wild type. The dual strategy integrating genetic engineering and hydrogen-promoting additives provides a foundation for efficient biohydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"151 ","pages":"Article 150161"},"PeriodicalIF":8.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517350","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
Platinum-palladium catalysts of various composition in the oxygen electroreduction reaction 氧电还原反应中不同组成的铂钯催化剂
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-07-01 DOI: 10.1016/j.ijhydene.2025.150166
Vladimir Guterman , Anastasia Alekseenko , Sergey Belenov , Vladislav Menshikov , Alina Nevelskaya , Angelina Pavlets , Kirill Paperzh , Ilya Pankov
{"title":"Platinum-palladium catalysts of various composition in the oxygen electroreduction reaction","authors":"Vladimir Guterman ,&nbsp;Anastasia Alekseenko ,&nbsp;Sergey Belenov ,&nbsp;Vladislav Menshikov ,&nbsp;Alina Nevelskaya ,&nbsp;Angelina Pavlets ,&nbsp;Kirill Paperzh ,&nbsp;Ilya Pankov","doi":"10.1016/j.ijhydene.2025.150166","DOIUrl":"10.1016/j.ijhydene.2025.150166","url":null,"abstract":"<div><div>Pt<sub>x</sub>Pd/C (x = 3.5, 2.1, 1.4) catalysts with varying compositions and a metal loading of approximately 40 wt% were synthesized using sequential reduction of palladium and platinum precursors in the liquid phase. Their structural, morphological characteristics, and electrochemical behavior in the oxygen reduction reaction (ORR) were investigated. Standardized platinum-palladium catalysts demonstrated a higher electrochemically active surface area (ECSA) and mass activity in ORR compared to a conventional Pt/C catalyst (HiSpec4000, Johnson Matthey). Among the synthesized catalysts, the Pt<sub>3</sub>·<sub>5</sub> Pd/C composition retained the highest ECSA and mass activity after stress testing in a three-electrode cell. Membrane-electrode assemblies of hydrogen-air fuel cells based on Pt<sub>2</sub>·<sub>1</sub> Pd/C and Pt<sub>3</sub>·<sub>5</sub> Pd/C demonstrated practically comparable performance to the MEA based on the conventional Pt/C catalyst. The study revealed that:i) The influence of the platinum-to-palladium ratio in the catalysts on their properties is determined by a combination of factors, including the structural and morphological characteristics of the metal-carbon nanocomposites, the architecture of bimetallic nanoparticles, and the fraction of nanoparticles with optimal microstructure in each synthesized sample; ii) Platinum-palladium electrocatalysts at the cathode of a proton-exchange membrane fuel cell exhibit comparable performance to the Pt/C analogue.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"150 ","pages":"Article 150166"},"PeriodicalIF":8.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518076","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
Optimizing dual fuel engine performance with hydrogen-enriched syngas from co-pyrolysis of biodegradable and non-biodegradable wastes 利用可生物降解和不可生物降解废物共热解的富氢合成气优化双燃料发动机性能
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-07-01 DOI: 10.1016/j.ijhydene.2025.150156
Kalaiarasi Kandasamy , Ratchagaraja Dhairiyasamy , Deepika Gabiriel
{"title":"Optimizing dual fuel engine performance with hydrogen-enriched syngas from co-pyrolysis of biodegradable and non-biodegradable wastes","authors":"Kalaiarasi Kandasamy ,&nbsp;Ratchagaraja Dhairiyasamy ,&nbsp;Deepika Gabiriel","doi":"10.1016/j.ijhydene.2025.150156","DOIUrl":"10.1016/j.ijhydene.2025.150156","url":null,"abstract":"<div><div>This study explores the production of hydrogen-enriched syngas from waste groundnut shells and waste milk covers through a catalyst bed-based co-pyrolysis process. The objective was to develop an efficient method for producing high-quality syngas, enhancing its hydrogen content, and evaluating its performance as a fuel in a compression ignition (CI) engine. The experimental setup involved co-pyrolysis at temperatures between 550 °C and 600 °C using Ni/Al<sub>2</sub>O<sub>3</sub> and La/Al<sub>2</sub>O<sub>3</sub> as catalysts. Gas chromatography analysis revealed that Ni/Al<sub>2</sub>O<sub>3</sub> catalyst produced syngas with a hydrogen concentration of 38.28 % and a total yield of 68 %, while La/Al<sub>2</sub>O<sub>3</sub> resulted in 35.45 % hydrogen with a 65.2 % yield. The CI engine tests demonstrated improved brake thermal efficiency (BTE) in dual fuel mode, reaching 32.20 % with hydrogen-enriched syngas, compared to 30.98 % with syngas without hydrogen enrichment. Specific fuel consumption (SFC) was reduced to 0.28051 kg/kW-hr. Emission analysis showed significant reductions in hydrocarbons (HC) and carbon monoxide (CO) emissions, though nitrogen oxide (NOx) emissions increased. The study concludes that hydrogen-enriched syngas, produced from waste materials, is a viable alternative fuel, offering enhanced engine performance and lower environmental impact, despite the challenge of increased NOx emissions.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"149 ","pages":"Article 150156"},"PeriodicalIF":8.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518742","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
Sustainable urea production via CO2 capture from cement plants: A techno-economic analysis with focus on process heat integration and electrification 通过从水泥厂捕获二氧化碳实现可持续尿素生产:技术经济分析,重点关注过程热集成和电气化
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-06-30 DOI: 10.1016/j.ijhydene.2025.150154
Hossein Asgharian , Albert Pujol Duran , Ali Yahyaee , Valeria Pignataro , Mads Pagh Nielsen , Florin Iov , Vincenzo Liso
{"title":"Sustainable urea production via CO2 capture from cement plants: A techno-economic analysis with focus on process heat integration and electrification","authors":"Hossein Asgharian ,&nbsp;Albert Pujol Duran ,&nbsp;Ali Yahyaee ,&nbsp;Valeria Pignataro ,&nbsp;Mads Pagh Nielsen ,&nbsp;Florin Iov ,&nbsp;Vincenzo Liso","doi":"10.1016/j.ijhydene.2025.150154","DOIUrl":"10.1016/j.ijhydene.2025.150154","url":null,"abstract":"<div><div>Urea, a key derivative of ammonia, is widely used in agriculture and has a significant impact on food security<strong>.</strong> This study evaluates a sustainable urea production pathway that utilizes hydrogen generated from water electrolysis for green ammonia synthesis and CO<sub>2</sub> captured from a cement plant using an MEA-based process. This study employed Aspen Plus V12.1 and MATLAB to develop rigorous system-level models of all subsystems involved in the sustainable urea production process. These subsystems include a cryogenic air separation unit (CASU), a modular system of alkaline electrolysers (AEL), a green Haber-Bosch (HB) process, an MEA-based CO<sub>2</sub> capture system, and the Stamicarbon process. To enhance the energy efficiency and cost-effectiveness of urea production, waste heat generated during green ammonia synthesis in the HB process was integrated into the stripper column of the MEA-based CO<sub>2</sub> capture system for solvent regeneration. A detailed economic analysis was conducted to assess the impact of this heat integration (HI) on reducing the CO<sub>2</sub> capture costs and, consequently, the overall urea production costs. Additionally, several heat supply scenarios were evaluated to meet the heat demand of the CO<sub>2</sub> stripper column in the Stamicarbon process. These included natural gas combustion, a cascade heat pump (HP), and natural gas combustion integrated with a cryogenic CO<sub>2</sub> capture (CCC) system. The results indicated that HI significantly decreases both the energy penalty and costs of the MEA-based CO<sub>2</sub> capture process, reducing the CO<sub>2</sub> capture costs by 41.27 % in 2024 and lowering the energy penalty by 50.40 %. Among the scenarios investigated, the cascade HP with HI proved to be the most cost-effective option for urea production. Additionally, electricity costs for operating the modular alkaline electrolyzers (AEL) dominate the sustainable urea production expenses, with 88.07 %–91.26 % of electricity costs allocated to AEL, depending on the selected production scenario. The modular AEL also represents the largest share of initial investment costs, accounting for 90.62 % of total capital expenditures in the urea production process.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"151 ","pages":"Article 150154"},"PeriodicalIF":8.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517266","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
The effect of ionomer molecular weight on gravimetric water uptake, hydrogen permeability, ionic conductivity and degradation behavior of anion exchange membranes 离子单体分子量对负离子交换膜重量吸水率、氢渗透性、离子电导率及降解行为的影响
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-06-30 DOI: 10.1016/j.ijhydene.2025.150126
Sven Sören Hartmann , Maximilian Schalenbach , Maria Schestakow , Rüdiger-A. Eichel
{"title":"The effect of ionomer molecular weight on gravimetric water uptake, hydrogen permeability, ionic conductivity and degradation behavior of anion exchange membranes","authors":"Sven Sören Hartmann ,&nbsp;Maximilian Schalenbach ,&nbsp;Maria Schestakow ,&nbsp;Rüdiger-A. Eichel","doi":"10.1016/j.ijhydene.2025.150126","DOIUrl":"10.1016/j.ijhydene.2025.150126","url":null,"abstract":"<div><div>Anion-exchange membranes (AEMs) are promising materials for efficient water electrolysis. However, their chemical instability remains a challenge to be solved for large-scale applications. In this study, AEMs of the same structural type but with varying molecular weights are synthesized, employing a polyaryletherketone backbone and quaternary ammonium groups as ion-conducting moieties. Due to strong interdependencies between the properties relevant for AEMs, in addition to chemical stability, water uptake, ionic conductivity, and hydrogen permeability in the fully hydrated state are also investigated as a function of molecular weight. The results show that the degradation of the ion exchange capacity (IEC) of the examined AEMs accelerates at higher KOH concentrations, which is typical for the Hofmann elimination mechanism. However, chemical degradation decreases with increasing molecular weight, without negatively affecting the other investigated membrane properties. As a result, the degradation rate of the high-molecular-weight material was reduced by up to 43 % compared to the low-molecular-weight counterpart.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"151 ","pages":"Article 150126"},"PeriodicalIF":8.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517264","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
Optimization study of green hydrogen fuel production stations in renewable energy hub: A case study in Quang Tri province, Vietnam 可再生能源枢纽绿色氢燃料生产站优化研究——以越南广治省为例
IF 8.1 2区 工程技术
International Journal of Hydrogen Energy Pub Date : 2025-06-30 DOI: 10.1016/j.ijhydene.2025.150204
Phap Vu Minh , Le Ngo Phuong , Nam Nguyen Hoai , Anh Nguyen Hong , Hanh Pham Thi , Tung Nguyen Thanh , Hung Bui Van , Dat Nguyen The , Huong Dinh Thi
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