International Journal of Hydrogen Energy最新文献

{"title":"Mechanism and experimental study of deformation and permeability of low-permeability coal structures under stress-desorption effects","authors":"Jiansong Peng ,&nbsp;Binwei Xia","doi":"10.1016/j.ijhydene.2025.05.096","DOIUrl":"10.1016/j.ijhydene.2025.05.096","url":null,"abstract":"<div><div>To enhance gas extraction efficiency, it is crucial to elucidate the factors influencing desorption deformation and permeability in low-permeability coal structures, as well as their interrelationships. In this study, using a self-developed triaxial diffusion-permeability device, desorption-apparent permeability experiments were conducted for methane (CH₄) and helium (He) under different gas pressures and confining stress conditions. A method for the determination of apparent desorption permeability was proposed. The relationship between coal structure desorption deformation and gas pressure, confining stress, and gas types was explored. Additionally, the relationship between apparent desorption permeability and coal structure deformation was analyzed, identifying the dominant influencing factor. A strain-apparent desorption permeability model was developed and experimentally validated. The results indicated that under constant stress, decreasing CH₄ desorption pressure initially resulted in radial shrinkage followed by expansion, while axial expansion initially decreased and then increased. The apparent desorption permeability decreased and then increased with decreasing gas pressure, exhibiting a 45.26-fold increase when the gas pressure decreased sixfold. Furthermore, apparent desorption permeability increased exponentially with coal column volumetric strain. Subsequently, under constant gas pressure, radial coal cylinder shrinkage increased linearly with decreasing confining pressure, while axial expansion and volumetric strains increased with decreasing He pressure. At high–pressure stages (1 MPa–3 MPa), CH₄ volumetric strain exhibited an 11.72–fold increase compared with He. However, in the low-pressure phase (1 MPa–0 MPa), the value of the He volumetric strain exhibited a 2.43-fold increase compared with CH₄. This study highlighted adsorption and slip effects as primary controls on desorption deformation in low-permeability coal structures.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"137 ","pages":"Pages 144-159"},"PeriodicalIF":8.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936040","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":"Numerical prediction on thermal performance and emission characteristics of Ammonia fueled swirl stabilized burner toward gas turbine nozzle considering in-situ SNCR with axial multi-staging strategy","authors":"Jonghyun Kim ,&nbsp;Minhyeok Kim ,&nbsp;Jungsoo Park","doi":"10.1016/j.ijhydene.2025.05.062","DOIUrl":"10.1016/j.ijhydene.2025.05.062","url":null,"abstract":"<div><div>Ammonia, as the carbon-free fuel has been considered an alternative energy source in large-scale industrial facilities owing to its high energy density and characteristics of hydrogen carrier. However, Ammonia fuel requires optimized combustion conditions to improve combustion efficiency and NO_x reduction technologies due to its low flame speed and fuel NO_x formation during combustion process. To solve these issues, cascaded role of Ammonia as fuel and reducing agent can be efficiently used during combustion process.</div><div>In the present study, selective non-catalytic reduction (SNCR) is introduced with axial multistaging scheme under ammonia fueled swirl stabilized burner describing gas turbine nozzle. Starting from fundamental combustion test under designed nozzle fueled with methane and ammonia, energy ratio of ammonia could be reached about 80 % maintaining 20 kWth and M-flame to V-flame transition could be achieved having similarity to numerically conducted flame visualization. To predict, thermal performance and emission characteristics, 100 % of ammonia fueled condition was described with numerical approach based on validated model compared to test results. To optimize de-NO_x and NH₃ slip, in-situ SNCR effect could be achieved under axial multi-staging injection. In detail, NO_x reduction was confirmed by applying pulsed multi-staging injection and optimization of NO_x and NH₃ slip was conducted. The results showed that a sufficient oxidant concentration is required to induce efficient NO_x removal. Moreover, reaction pathway of NOx reduction mechanism was conducted based on detailed chemical reaction analysis.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"137 ","pages":"Pages 131-143"},"PeriodicalIF":8.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936234","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 review on computational fluid dynamics modeling of fixed-bed biomass gasifiers: Recent advances and design analysis","authors":"Nathada Ngamsidhiphongsa ,&nbsp;Phantisa Limleamthong ,&nbsp;Phuet Prasertcharoensuk ,&nbsp;Amornchai Arpornwichanop","doi":"10.1016/j.ijhydene.2025.04.176","DOIUrl":"10.1016/j.ijhydene.2025.04.176","url":null,"abstract":"<div><div>Biomass gasifiers, especially fixed-bed type, have been perceived as a promising technology for small-scale power generation from renewable sources. Depending on production capacity and end-use applications, various modifications of fixed-bed gasifiers have emerged to generate clean synthesis gas (syngas) with less waste disposal and higher gasifier efficiency. Recently, H₂-rich and CO₂-free syngas production has been experimented with by modifying operating conditions and gasifier design. Computational fluid dynamics (CFD) modeling, incorporating hydrodynamics, chemical reaction mechanism, reactor development, and process intensification, has been brought to pursue a rigorous investigation of gasifier design and the gasification process. This review presents a recent advance in developing the CFD model of fixed-bed gasifiers. A detailed characterization of the biomass gasification process, including devolatilization, homogeneous gas oxidation and reduction, and heterogeneous char reactions, is highlighted. Design analysis of fixed-bed gasifiers is also discussed. Tar species in the devolatilization reaction and their cracking mechanism are interpreted. In addition, the effects of a gasifier configuration and an equivalence ratio of gasifying agents on the producer gas composition, tar content in the producer gas, and the cold gas efficiency are analyzed as a basis for further improvement of the CFD gasifier models.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 654-671"},"PeriodicalIF":8.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935790","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":"Fluorinated graphene quantum dots-induced defect passivation of perovskite film toward stable and efficient perovskite solar cell","authors":"Yao Chen ,&nbsp;Jiajun Chen ,&nbsp;Xiaorui Wang ,&nbsp;Penglin Deng ,&nbsp;Yijun Shen ,&nbsp;Xiaohong Wang","doi":"10.1016/j.ijhydene.2025.04.329","DOIUrl":"10.1016/j.ijhydene.2025.04.329","url":null,"abstract":"<div><div>Passivation engineering has been considered as an effective strategy to eliminate defects at grain boundaries and interface of perovskite films. Herein, fluorinated graphene quantum dots (FGQDs), as an antisolvent additive, are successfully introduced into perovskite films for defect passivating. FGQDs can regulate the crystallization process of perovskite via chemical bonding with the undercoordinated Pb²⁺. As a result, the high-quality perovskite film with enlarged grain size and reduced defect density can be obtained. FGQDs modified Cs_0.05MA_0.16FA_0.79Pb(I_0.83Br_0.17)₃ device yields a high-power conversion efficiency of 21.74 %, and a higher PCE of 24.12 % is delivered for the device assembled with FA-based perovskite with a composition of Cs_0.05(FA_0.98MA_0.02)_0.95Pb(I_0.98Br_0.02)₃. Due to the excellent hydrophobicity of F atoms, the unencapsulated devices exhibit good long-term stability under 50 % relative humidity condition (85 % efficiency retention after 30 days). Our findings provide a new passivation strategy toward stable and efficient perovskite solar cells.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"137 ","pages":"Pages 107-113"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936228","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":"Effects of methanol and its cracked gas on ammonia consumption and NOx emission under high pressure","authors":"Geyuan Yin,&nbsp;Shujie Shen,&nbsp;Haochen Zhan,&nbsp;Erjiang Hu,&nbsp;Zuohua Huang","doi":"10.1016/j.ijhydene.2025.04.310","DOIUrl":"10.1016/j.ijhydene.2025.04.310","url":null,"abstract":"<div><div>The mole fraction profiles for NH₃/syngas were measured at 5.0 MPa and different blending ratios and compared with NH₃/methanol to understand the effects of methanol and its cracked gas on ammonia oxidation and micro-species behavior. A kinetic model proposed in our previous work is validated against the measured data. The model demonstrates remarkable accuracy in predicting the concentration profiles of NH₃ and NO_x under all conditions. Moreover, a superior performance of methanol control is found at low temperatures, while syngas has a better performance at high temperatures. The onset temperature of methanol is lower than that of syngas. When the temperature reaches 950 K, H₂ can provide more active OH than methanol and accelerate the ammonia consumption through the reaction cycle. Moreover, methanol triggers NO formation at 50 K lower than syngas, and the peak molar concentration of NO is lower than that of syngas at high blending ratios. At a substitution ratio of 50 %, NO generated by an ammonia-methanol mixture exhibits an “N”-shaped trend, while it monotonically increases with temperature with syngas blending. The peak concentrations of N₂O with methanol are higher than those from syngas, especially at substitution ratios of 10 % and 25 %.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"136 ","pages":"Pages 491-500"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931561","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":"Optimization of multiple alkaline water electrolyzers coupled with solar photovoltaic power for green hydrogen production on a large scale","authors":"Yixiang Zhang ,&nbsp;Fanhang Zhang ,&nbsp;Xiangzhe Song ,&nbsp;Rongrong Chen ,&nbsp;Zeyi Chen ,&nbsp;Xiongbo Duan ,&nbsp;Yan Xia","doi":"10.1016/j.ijhydene.2025.05.056","DOIUrl":"10.1016/j.ijhydene.2025.05.056","url":null,"abstract":"<div><div>The integration of intermittent renewable energy with alkaline water electrolyzer (AWE) for green hydrogen production faces challenges such as frequent start-stop cycle, uneven power distribution, and operational inefficiency. To address these issues, this study proposes a collaborative optimization framework combining a hybrid long short-term memory-convolutional neural network (LSTM-CNN) for solar photovoltaic (PV) power prediction and a discrete particle swarm optimization (DPSO) algorithm for dynamic scheduling of multiple alkaline water electrolyzers. The LSTM-CNN model achieves high-precision 15-min interval solar PV power forecasting, with root mean square error (RMSE) values as low as 0.106–2.657 and coefficients of determination (<span><math><mrow><msup><mi>R</mi><mn>2</mn></msup></mrow></math></span>) exceeding 0.95 under various weather conditions. The DPSO algorithm optimizes the states of electrolyzers by setting fitness functions and penalty functions or forcing solution to comply with the constraints. Experimental results demonstrate that the proposed method respectively achieves solar PV power utilization rates of 98.63 %, 96.11 %, and 94.13 % under weathers of Type I, Type II and Type III, outperforming simple start-stop (98.311 %, 96.021 %, and 86.594 %) and rotation algorithms (93.242 %, 96.021 %, and 86.62 %). The operational time discrepancies among electrolyzers are reduced to within 1–5 h, effectively mitigating overload risks and local hotspot effects. Furthermore, the algorithm minimizes daily start-stop cycle to once or twice under different weather types while maintaining uniformly power distribution. This work provides a scalable strategy for dispatching of multiple alkaline water electrolyzers, enhancing renewable energy utilization efficiency and supporting large-scale green hydrogen deployment toward carbon neutrality goals.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"136 ","pages":"Pages 511-532"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931523","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":"Effect of sulfurization: comparative performance of NiMoO4 and MoS2-NixS6 catalysts in overall water splitting","authors":"Yue Mao ,&nbsp;Lili Geng ,&nbsp;Qiangqiang Zhang ,&nbsp;Lulu Zhang ,&nbsp;Yongming Zeng ,&nbsp;Ley Boon Sim","doi":"10.1016/j.ijhydene.2025.05.038","DOIUrl":"10.1016/j.ijhydene.2025.05.038","url":null,"abstract":"<div><div>This study fabricates MoS₂-Ni_xS₆ on nickel foam using a one-step hydrothermal synthesis to investigate the effect of sulfurization on the electrochemical properties and catalytic activity of Ni–Mo based materials for overall water splitting. XRD, HRTEM, EDX, and XPS indicate successful sulfurization. MoS₂-Ni_xS₆/NF shows significant crystal reorganization after OER activation, while HER has a smaller surface effect. SEM reveals an advancement from spherical nanosheets of NiMoO₄/NF to nanorods and nanoclusters of MoS₂-Ni_xS₆/NF. HER activation impacts nanocluster size more than OER. HRTEM highlights ionic conductivity-friendly stacking faults after OER activation and the formation of a heterojunction following HER activation. XPS shows enhanced desired oxidation states after both activations. Signs of material improvement due to activations are reified through LSV comparisons. For overall water splitting, MoS₂-Ni_xS₆/NF demonstrates stable performance around 1.67 V at 10 mA cm⁻² for 120 h with 98.8 % and 99.5 % Faradaic efficiency for OER and HER, respectively.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"137 ","pages":"Pages 95-106"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932217","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":"Effect of microstructure on the hydrogen cracking behavior of bimetallic metallurgical clad pipes: The role of precipitated phases and inclusions","authors":"Guanghu Yao ,&nbsp;Ming Liu ,&nbsp;Wenhui Ye ,&nbsp;Lining Xu ,&nbsp;Jinxu Li ,&nbsp;Lijie Qiao ,&nbsp;Yu Yan","doi":"10.1016/j.ijhydene.2025.05.092","DOIUrl":"10.1016/j.ijhydene.2025.05.092","url":null,"abstract":"<div><div>Bimetallic metallurgical clad pipes are designed to resist corrosion cracking due to hydrogen sulfide. However, they are still susceptible to hydrogen-induced cracking, limiting their safe use in practice. This study investigated the mechanical properties and hydrogen distribution characteristics of alloy 825/L360 bimetallic metallurgical clad pipes through fracture tests and hydrogen distribution experiment. SKPFM and hydrogen microprinting were innovatively combined to characterize local hydrogen distribution in welded materials. This overcame single-scale limits, enabling macro-nano correlation of hydrogen distribution. The fracture behavior of alloy 825/L360 bimetallic clad pipes in a hydrogen environment was explored. Key results: after 133-h hydrogen precharge, specimen elongation loss hit 53 %. Hydrogen cracks started at carbide-containing grain boundaries, with TiN aiding expansion. SKPFM showed M23C6-substrate interfaces had irreversible hydrogen enrichment (6.54 mV–92.84 mV), while TiN inclusions had weak reversible trapping (10 mV fluctuation).</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"137 ","pages":"Pages 13-25"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932222","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 photocatalytic H2 evolution and biological stimulation via the calcination of bulk g-C3N4 under different gases","authors":"Mengying Xu ,&nbsp;Jingyan Zheng ,&nbsp;Pier-Luc Tremblay ,&nbsp;Xiangyang Jiang ,&nbsp;Chun He ,&nbsp;Yujie Wang ,&nbsp;Muhammad Babur Joya ,&nbsp;Tian Zhang","doi":"10.1016/j.ijhydene.2025.05.115","DOIUrl":"10.1016/j.ijhydene.2025.05.115","url":null,"abstract":"<div><div>Amid the pursuit of renewable energy, photocatalytic H₂ evolution (PHE) and biosynthetic processes gained attention. Bulk g-C₃N₄ (CN) was calcined under the atmosphere and various gases (air, CO₂, N₂, and Ar) to achieve ultra-thin nanosheets. Using greenhouse gas CO₂ for the calcination (CN–CO₂) results in a greater PHE rate than in the atmosphere and air, similar to inert gases N₂ and Ar. Under visible light, CN–CO₂ produced H₂ 2.6 times faster than CN. Therefore, CN–CO₂ was chosen to promote polyhydroxybutyrate (PHB) production by <em>Cupriavidus necator</em> H16 in hybrid photosynthetic system. The heterotrophic PHB production was increased to 9.14 g/L, which was 1.9 times higher than without the photocatalyst (4.93 g/L), and 1.1 times more than with CN (8.11 g/L). The autotrophic PHB production was also enhanced by adding CN–CO₂. In summary, the dual benefits of PHE and biological stimulation were achieved by calcining g-C₃N₄ in CO₂.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"136 ","pages":"Pages 501-510"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931524","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":"Numerical study on detonation initiation of aviation kerosene-hydrogen-air mixtures in an obstructed tube under various hydrogen ratios and initial pressures","authors":"Yuxiang Hui ,&nbsp;Zhiwu Wang ,&nbsp;Weifeng Qin ,&nbsp;Jingtao Xiao ,&nbsp;Yongfeng Liu ,&nbsp;Dingming Li ,&nbsp;Man Zhang","doi":"10.1016/j.ijhydene.2025.05.102","DOIUrl":"10.1016/j.ijhydene.2025.05.102","url":null,"abstract":"<div><div>Aviation kerosene mixed with hydrogen provides a promising approach to improve the detonation initiation performance of aviation kerosene. In this study, the detonation initiation processes in an obstructed tube fueled with aviation kerosene/hydrogen mixtures were numerically investigated, covering hydrogen ratios from 0.1 to 0.5 and initial pressures from 0.5 atm to 2 atm. The mechanism of flame acceleration and detonation initiation was analyzed, and the effects of hydrogen ratio and initial pressure on detonation initiation were explored. The results indicated that the detonation initiation process in the obstructed tube could be divided into three stages: flame acceleration, deflagration to detonation transition (DDT), and self-sustaining detonation. The variations in detonation initiation time, detonation initiation distance, DDT run up time, DDT run up distance, the time and distance required for the DDT process under different hydrogen ratios and initial pressures were summarized. Additionally, the effects of hydrogen ratio and initial pressure on detonation velocity were also investigated.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"137 ","pages":"Pages 114-124"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936230","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}