New & Renewable Energy, Год журнала: 2024, Номер 20(4), С. 26 - 37
Опубликована: Дек. 19, 2024
Язык: Английский
International Journal of Hydrogen Energy, Год журнала: 2024, Номер 78, С. 1449 - 1467
Опубликована: Июль 5, 2024
Язык: Английский
Процитировано
89
International Journal of Hydrogen Energy, Год журнала: 2024, Номер 87, С. 1056 - 1073
Опубликована: Сен. 13, 2024
Язык: Английский
Процитировано
11
Case Studies in Thermal Engineering, Год журнала: 2024, Номер 60, С. 104732 - 104732
Опубликована: Июнь 19, 2024
Carbon-free ammonia and hydrogen have various disadvantages when used individually, which limits their application as clean energies. These can be effectively overcome by combining them ammonia/hydrogen mixtures in a rational manner. In this paper, the combustion of oxygen (the basic form combustion) is experimentally investigated at experimental conditions. The results display that laminar burning velocities ammonia/hydrogen/oxygen increase with increasing fuel ratios. At P0 = 0.5 atm φ 1.0, velocity proliferated from 1.91 m/s to 4.7 ratio 2.0. As equivalence increases, rises first then decreases, highest point appearing 0.8. initial pressure has minimal impact on velocity. x decreased slightly 3.16 2.96 increased 0.1 1.0 atm. empirical correlation among versus given, under varying ratios (0 %–100 %) (0.5–1.5) atmospheric well predicted equations. NO most emitted NOx substance hydrogen/ammonia combustion. amount produced decreases gradually growing ratio. research utilized renew flame data mixture are important for development mixtures.
Язык: Английский
Процитировано
4
Energies, Год журнала: 2024, Номер 17(16), С. 3936 - 3936
Опубликована: Авг. 8, 2024
As the country that emits most carbon in world, China needs significant and urgent changes emission control transportation sector order to achieve goals of reaching peak emissions before 2030 achieving neutrality by 2060. Therefore, promotion new energy vehicles has become key factor these two objectives. For reason comprehensive cost directly affects end customer’s choice heavy truck models, this work compares advantages, disadvantages, economic feasibility diesel, liquefied natural gas (LNG), electric, hydrogen, methanol trucks from a total life cycle end-user perspective under various scenarios. The study results show when prices LNG, electricity, fuels are at their highest, price hydrogen is 35 CNY/kg, five types highest lowest (HHT), (MHT), diesel (DHT), electric (EHT), LNG (LNGHT), ignoring adverse effects cold environments on car batteries. When average or levels, 30 CNY/kg 25 HHT, DHT, MHT, EHT, LNGHT. considering impact environments, even with lower electricity prices, EHT struggle be economical low. If above 1 CNY/kWh, regardless viability than HHT purchase 500,000 CNY CNY/kg. Simultaneously, an exhaustive competitiveness analysis powered diverse sources highlights specific categories ought prioritized for development during periods challenges they confront. Finally, based future trends, corresponding policy recommendations proposed facilitate high decarbonization sector.
Язык: Английский
Процитировано
4
Journal of Renewable and Sustainable Energy, Год журнала: 2025, Номер 17(1)
Опубликована: Янв. 1, 2025
A life-cycle cost model for power-to-fuel technologies, including production, storage, transportation, and refueling processes, was developed to evaluate four types of options: proton exchange membrane electrolysis hydrogen, single-step methanol synthesis, two-step ammonia synthesis. The study compares sensitivity factors (scale, reaction efficiency, electricity price) based on unit calorific value costs. Results indicate that price significantly affects overall costs, with synthesis being the most cost-effective. Single-step has highest due efficiency limitations, but it becomes cheapest when reaches 80% drops 0.05 CNY/kWh. impact transport distance storage costs showed they are lower than suggesting can serve as effective hydrogen carriers, reducing improving safety.
Язык: Английский
Процитировано
0
Energies, Год журнала: 2025, Номер 18(3), С. 741 - 741
Опубликована: Фев. 6, 2025
Hydrogen purity plays a crucial role in the expanding hydrogen economy, particularly applications such as fuel cells and industrial processes. This review investigates relationship between production methods resulting levels, emphasizing differences reforming, electrolysis, biomass-based techniques. Furthermore, it explores state-of-the-art purification technologies, including pressure swing adsorption (PSA), membrane separation, cryogenic distillation, highlighting their effectiveness limitations achieving ultra-pure hydrogen. Analytical gas chromatography, mass spectrometry, cavity ring-down spectroscopy are also discussed terms of accuracy application scope for quality assessment. By integrating findings from global domestic studies, this paper aims to provide comprehensive understanding challenges advancements purity, offering insights into optimizing sustainable energy future.
Язык: Английский
Процитировано
0
International Journal of Hydrogen Energy, Год журнала: 2025, Номер 118, С. 93 - 101
Опубликована: Март 18, 2025
Язык: Английский
Процитировано
0
Materials, Год журнала: 2025, Номер 18(6), С. 1363 - 1363
Опубликована: Март 19, 2025
To develop liner materials with improved toughness, this study combines molecular dynamics simulations and experimental testing to investigate the effect of different mass ratios (10/0, 7/3, 6/4, 4/6, 3/7, 0/10) high-density polyethylene (HDPE)/polyamide 6 (PA6) on their fracture toughness composites. The was quantitatively assessed using J-integral method, while material’s behavior in terms crack propagation during tensile deformation examined at level. results reveal that as HDPE ratio increases, composites also gradually improves. Furthermore, four (PA6, 4HDPE/6PA6, 7HDPE/3PA6, HDPE) tested essential work method. trend observed simulation agreement results, validating reliability simulation.
Язык: Английский
Процитировано
0
Hydrogen, Год журнала: 2025, Номер 6(2), С. 24 - 24
Опубликована: Апрель 10, 2025
Hydrogen energy is essential in the transition to sustainable transportation planning, providing a clean and efficient alternative traditional fossil fuels. As versatile carrier, hydrogen facilitates decarbonization of diverse modes, including passenger vehicles, heavy-duty trucks, trains, maritime vessels. To justify clarify role this study conducts comprehensive techno-economic environmental assessment production USA, Europe, China. Utilizing Shlaer–Mellor method for policy modeling, analysis highlights regional differences offers actionable insights inform strategic decisions frameworks advancing adoption. potential was assessed from solar biomass resources, with results showing that solar-based significantly more efficient, producing 704 tons/yr/km2, compared 5.7 tons/yr/km2 biomass. A Monte Carlo simulation conducted project emissions market share gasoline vehicles 2024 2050. The indicate could achieve near-zero capture approximately 30% by 2050, while will decline 60% higher emissions. Furthermore, using USA yields per capita output 330,513 kg/yr, 6079 kg/yr concludes hydrogen, particularly renewable sources, holds significant reducing greenhouse gas emissions, China focused on addressing dependence, air pollution, technological development sector.
Язык: Английский
Процитировано
0
Sustainability, Год журнала: 2024, Номер 16(13), С. 5569 - 5569
Опубликована: Июнь 29, 2024
This work studies the efficiency and long-term viability of powered hydrogen production. For this purpose, a detailed exploration production techniques has been undertaken, involving data collection, information authentication, organization, analysis. The trends, environmental impact, costs in landscape marked by limited availability were investigated. main contribution is to reduce existing gap field compiling summarizing dispersed data. findings are expected facilitate decision-making process considering regional variations, energy source availability, potential for technological advancements that may further enhance economic electrolysis. results show methods can be identified do not cause significant harm environment. Photolysis stands out as least serious offender, producing 0 kg CO2 per H2, while thermolysis emerges major contributor emissions, with 20 H2 produced.
Язык: Английский
Процитировано
2