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

The structural design of a metal hydride hydrogen storage reactor enhanced with phase change heat transfer 相变传热强化型金属氢化物储氢反应器结构设计

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153670

Mu Chai, Jin-sheng Wu, Zuo-hong Zhu, Jie Ye, Mian Jiang, Yong Chen, Kuan-fang He

The hydrogen absorption reaction of metal hydrides (MH) is accompanied by a significant thermal effect. Phase change materials (PCMs), known for their superior thermal energy storage capabilities, enable effective thermal management in MH reactors. This study proposes a novel reactor design that integrates PCMs with MHs (MH-PCM). By establishing numerical models of reaction beds with heat exchange fins of different shapes, the effects of fin structure, quantity, different area ratios of upper-lower bases, and different numbers of fin layers on the heat transfer performance and hydrogen absorption efficiency of the reactor are discussed in detail. The results show that the proposed novel MH-PCM reactor significantly improves thermal management by enlarging the heat transfer area, improving the uniformity of temperature distribution, enhancing the upper convection effect, and consequently increases the hydrogen absorption rate. Among all the fin configurations investigated, the quadrilateral fin structure exhibits a 33.17 % increase in hydrogen absorption efficiency compared with the original structure. Specifically, in contrast to the two-fin structure, the five-fin structure reduces the saturated hydrogen absorption time by 26.3 %. In terms of different fin layer numbers, the two-layer fin structure delivers the optimal hydrogen absorption performance, which shortens the time required to reach saturated hydrogen absorption by 5 % compared with the one-layer structure and elevates the hydrogen absorption rate by 65.15 % relative to the original structure. This finding provides valuable guidance for the future optimization and application of MH-PCM reactors.

金属氢化物（MH）的吸氢反应伴随着显著的热效应。相变材料（PCMs）以其优越的热能储存能力而闻名，可以在MH反应堆中进行有效的热管理。本研究提出了一种集成pcm和mh的新型反应器设计（MH-PCM）。通过建立不同形状换热片反应床的数值模型，详细讨论了换热片结构、换热片数量、不同上下基座面积比、不同换热片层数对反应器换热性能和吸氢效率的影响。结果表明，新型MH-PCM反应器通过扩大传热面积，改善温度分布均匀性，增强上部对流效应，从而提高吸氢率，显著改善了热管理。在研究的所有翅片构型中，四边形翅片结构的吸氢效率比原始结构提高了33.17%。具体而言，与双翅片结构相比，五翅片结构可减少26.3%的饱和吸氢时间。在不同翅片层数下，双层翅片结构吸氢性能最佳，达到饱和吸氢所需时间比单层结构缩短5%，吸氢率比原结构提高65.15%。这一发现为今后MH-PCM反应器的优化和应用提供了有价值的指导。

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引用次数: 0

Flexible porous Ni-based electrodes integrated with ZrO2-modified separator for high current density alkaline water electrolysis 柔性多孔镍基电极集成zro2改性分离器用于大电流密度碱性电解

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153618

Liang Ren , Yugang Zhou , Xu Chen, Tao Zhang, Yu Gao, Ruina Zhang, Yanshuo Li, Wei Fang

Renewable alkaline water electrolysis (ALK) is widely regarded as a sustainable and dependable pathway for large-scale green hydrogen production. However, the performance of ALK with zero gap is constrained by limitations in the separator-electrodes, and the damage of the separator is prone to occur under long-term operation due to the friction between commercial nickel mesh electrode and the separator. In this work, we fabricated the flexible porous nickel-polyethersulfone (Ni-PESf) composite electrodes with different casting thickness (400, 800 and 1200 μm) and zirconia-polyethersulfone (ZrO₂-PESf) composite separator via the phase inversion tape casting process. The ZrO₂-PESf separator exhibited remarkable thermal stability (no significant decomposition below 400 °C), as well as good mechanical properties (a maximum elongation of 22.62 % and a tensile strength of 12.55 MPa). Moreover, the ZrO₂-PESf separator showed high hydrophilicity (a contact angle of 45.7°), and possessed a low areal resistance of 0.322 Ω cm⁻². The homemade ALK device based on the ZrO₂-PESf separator integrated with 1200 μm-thickness-Ni-PESf (NP1200) electrodes achieved the highest current density of 1.8 A cm⁻²@2.2 V in a 30 wt% KOH solution at 80 °C. Additionally, a more flexible cell configuration of NP800||ZrO₂-PESf||NP800 demonstrated stable performance by maintaining a voltage of approximately 2 V at 0.8 A cm⁻² for 150 h, enabling straightforward mass manufacturing for high-purity hydrogen.

可再生碱性电解（ALK）被广泛认为是一种可持续、可靠的大规模绿色制氢途径。然而，零间隙ALK的性能受到分离器电极的限制，并且在长期运行下，由于商用镍网电极与分离器之间的摩擦，容易造成分离器的损坏。本文采用相变带铸造工艺制备了不同铸造厚度（400、800和1200 μm）的镍聚醚砜（Ni-PESf）柔性多孔复合电极和锆聚醚砜（ZrO2-PESf）复合隔膜。ZrO2-PESf分离器具有良好的热稳定性（在400℃以下无明显分解）和良好的力学性能（最大伸长率为22.62%，抗拉强度为12.55 MPa）。此外，ZrO2-PESf分离器具有较高的亲水性（接触角为45.7°），面阻低，为0.322 Ω cm−2。基于ZrO2-PESf分离器集成1200 μm厚度的ni - pesf （NP1200）电极的自制ALK器件在30 wt% KOH溶液中，在80°C下获得了1.8 A cm−2@2.2 V的最高电流密度。此外，更灵活的电池配置NP800||ZrO2-PESf||NP800表现出稳定的性能，在0.8 a cm - 2下保持约2 V的电压150小时，使高纯度氢气的直接批量生产成为可能。

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引用次数: 0

Particle size effect of TiO2 on the catalysis of MgH2 TiO2粒径对MgH2催化作用的影响

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153633

Xizhe Lu , Fang Cheng , Gangqiang Wu , Zhendong Yao , Yongfu Cui , Chao Li

MgH₂ is a hydrogen storage material with high hydrogen absorption/release temperatures and poor kinetics. Although a large number of catalysts capable of optimizing the performance of MgH₂ have been developed in recent years, there are relatively few studies focus on its size effect. In this work, TiO₂ particles with the similar morphology but different sizes were synthesized. It shows that reducing particle size within a certain range (from 1.3 μm to 60 nm) can dramatically enhance the catalytic effect of TiO₂ on MgH₂. However, when the catalyst size reduces from 60 to 25 nm, due to the severe agglomeration of nanoparticles, there is a little improvement in the dehydrogenation temperature, but an obvious improvement in dynamics. It can be seen in solid-state catalytic systems, merely considering particle size while ignoring the problem of agglomeration and dispersion form of the catalyst in the matrix cannot achieve the best catalytic effect.

MgH2是一种储氢材料，其吸氢/放氢温度高，动力学差。虽然近年来开发了大量能够优化MgH2性能的催化剂，但对其粒径效应的研究相对较少。本文合成了形貌相似但尺寸不同的TiO2颗粒。结果表明，在一定范围内（1.3 μm ~ 60 nm）减小TiO2的粒径可以显著增强TiO2对MgH2的催化作用。而当催化剂尺寸从60 nm减小到25 nm时，由于纳米颗粒团聚严重，脱氢温度提高不大，但动力学改善明显。可见，在固态催化体系中，仅考虑颗粒大小而忽略催化剂在基体中的团聚和分散形式问题，无法达到最佳的催化效果。

引用次数: 0

Sustainable ammonia production from waste via chemical looping and mechanochemical synthesis: A comparative life cycle and techno-economic analysis 通过化学循环和机械化学合成从废物中可持续生产氨：一个比较的生命周期和技术经济分析

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153712

Jeongjae Oh , Inhye Kim , Minseok Im , Dongwoo Kang , Sunghyun Cho

This study investigates the feasibility of producing ammonia from waste-derived resources through four pathways: the reference incineration process (INCI), the Haber–Bosch route using imported nitrogen (HB), a mechanochemical ball milling process (BM), and an integrated chemical looping–ball milling system (CLBM) that internally supplies hydrogen and nitrogen. All scenarios were conducted at a scale of 2000 kg/day, followed by life cycle assessment using the ReCiPe 2016 Midpoint method and techno-economic analysis that included capital cost, operating cost, carbon tax, and net profit. BM achieved the lowest GWP on a waste-treatment basis (2.330 kg CO₂-eq/kg-waste), while CLBM showed the lowest product-based emissions (5.439 kg CO₂-eq/kg-NH₃). Although none of the routes achieved positive profitability at the evaluated scale, CLBM recorded the smallest annual deficit (−103.6 k$), outperforming HB and BM due to higher ammonia productivity and internal resource generation. Overall, CLBM demonstrated the most favorable balance between environmental and economic performance.

本研究探讨了通过四种途径从废物来源资源中生产氨的可行性：参考焚烧工艺（INCI）、使用进口氮气的Haber-Bosch路线（HB）、机械化学球磨工艺（BM）和内部供应氢气和氮气的集成化学环球磨系统（CLBM）。所有情景均以2000 kg/天的规模进行，随后使用ReCiPe 2016 Midpoint方法进行生命周期评估，并进行技术经济分析，包括资本成本、运营成本、碳税和净利润。BM在废物处理基础上实现了最低的全球变暖潜能值（2.330千克二氧化碳当量/千克废物），而CLBM显示了最低的基于产品的排放量（5.439千克二氧化碳当量/千克nh3）。虽然没有一条航线在评估规模上实现正盈利，但CLBM记录了最小的年度亏损（- 103.6 k$），由于更高的氨生产率和内部资源生成，其表现优于HB和BM。总体而言，CLBM在环境和经济绩效之间表现出最有利的平衡。

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引用次数: 0

Efficient and stable synergistic production of hypochlorous acid and hydrogen from seawater via lattice chlorine participation in BiOCl/TiO2 heterojunction photoanodes 通过晶格氯参与BiOCl/TiO2异质结光阳极从海水中高效稳定地协同生产次氯酸和氢

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153732

Yanmei Xue , Xiaohong Li , Xingzi Bian , Haochen Xie , Yue Li , Lindong Liu , Wanggang Zhang , Jian Wang , Yiming Liu

The simultaneous photoelectrocatalytic production of hypochlorous acid (HClO) and hydrogen (H₂) from seawater represents a promising strategy for water disinfection and clean energy generation. However, developing efficient and stable catalyst systems remains a significant challenge. Herein, we report the construction of a BiOCl/TiO₂ heterojunction photoanode that achieves remarkable synergy for concurrent HClO and H₂ evolution. The composite photoanode demonstrates exceptional performance, yielding 106.0 μmol cm⁻² of hypochlorous acid and 96.9 μmol cm⁻² of hydrogen within 6 h. This enhanced activity is primarily attributed to the synergistic effect of a Type-II heterojunction for spatial charge separation and the unique dynamic cycle of lattice chlorine ions within BiOCl. This cycle, involving the auto-oxidation of lattice Cl⁻ and subsequent vacancy replenishment by environmental Cl⁻, endows the catalyst with superior self-regeneration capability and stability. The synergistic mechanism between heterojunction engineering and lattice chlorine participation unveiled in this work provides a novel design principle for advanced photoelectrochemical (PEC) seawater splitting systems.

从海水中同时光电催化生产次氯酸（HClO）和氢（H2）是一种很有前途的水消毒和清洁能源生产策略。然而，开发高效、稳定的催化剂体系仍然是一个重大挑战。在这里，我们报道了一个BiOCl/TiO2异质结光阳极的构建，它在HClO和H2的同步进化中实现了显著的协同作用。复合光阳极表现出优异的性能，在6 h内产生106.0 μmol cm−2的次氯酸和96.9 μmol cm−2的氢。这种增强的活性主要归因于ii型异质结的空间电荷分离的协同效应和BiOCl中晶格氯离子的独特动态循环。这种循环包括晶格Cl -的自动氧化和随后由环境Cl -补充的空位，赋予催化剂优异的自我再生能力和稳定性。本研究揭示了异质结工程与晶格氯参与之间的协同机制，为先进的光电化学海水分解系统提供了一种新的设计原理。

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引用次数: 0

Tuning hydrogen adsorption through synergy in non-noble bimetallic substrates 调节氢吸附通过协同作用在非贵金属双金属衬底

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153692

Pedro Ivo R. Moraes , Rafael L.H. Freire , Marina Medina , Juliana F. Brito , Lucia H. Mascaro , Juarez L.F. Da Silva

The rational design of non-noble transition-metal bimetallic substrates represents a promising approach for developing efficient and tunable electrocatalysts for the hydrogen evolution reaction. In this work, we employ density functional theory calculations with van der Waals corrections combined with the computational hydrogen electrode model to investigate how hydrogen–substrate interactions govern the Gibbs free energy of hydrogen adsorption (

) on ordered bimetallic surfaces. We investigated ordered bimetallic compounds

,

, and

with varying atomic ratios (3:1, 1:1, and 1:3) to establish adsorption-site environment activity relationships. Our results reveal that

exhibits a nearly linear dependence between

and the substrate ratio, showing that the catalytic activity changes by controlling the ratio of the transition-metal species. This linear scaling behavior provides a predictive framework for the rational design of experiments aimed at improving hydrogen adsorption energetics, which are governed by modulation control of the chemical species directly interfacing with the reaction environment. In contrast, although

and

compounds do not exhibit a linear trend as a function of specific ratios due to the local environment at the adsorption sites, the

and

substrates still demonstrate favorable activity. Moreover, hydrogen exhibits a strong energetic preference for hollow sites, where the adsorption energy, the dominant contribution to the Gibbs free energy, correlates directly with the chemical identity of the local catalytic site environment.

非贵金属过渡金属双金属衬底的合理设计为开发高效、可调的析氢电催化剂提供了一条有前途的途径。在这项工作中，我们采用密度泛函理论计算与范德华校正结合计算氢电极模型来研究氢-底物相互作用如何控制有序双金属表面上氢吸附的吉布斯自由能（）。我们研究了有序双金属化合物，以及不同原子比（3:1,1:1和1:3）的双金属化合物，以建立吸附与环境活性的关系。结果表明，与底物比之间呈近似线性关系，表明通过控制过渡金属的比例可以改变催化活性。这种线性缩放行为为合理设计旨在改善氢吸附能量的实验提供了预测框架，氢吸附能量是由与反应环境直接接触的化学物质的调制控制所控制的。相比之下，尽管由于吸附部位的局部环境，和化合物不表现出作为特定比率函数的线性趋势，但和底物仍然表现出良好的活性。此外，氢对空心位点表现出强烈的能量偏好，其中吸附能（吉布斯自由能的主要贡献）与局部催化位点环境的化学特性直接相关。

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引用次数: 0

An in-situ biosampling device for separating reservoir-associated from wellbore-specific microbial signals in underground gas reservoirs 一种用于分离地下气藏中与储层相关的与井筒特定的微生物信号的原位生物采样装置

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153521

Artur B. Zaduryan , Markus Pichler , Niels Waldmann , Christian Riedl , Karin Müllern , Benedikt Hasibar , Andreas P. Loibner

Conventional microbiological sampling of underground gas reservoirs commonly relies on sump water, which may integrate wellbore-specific signals. As part of Carbon Cycle Economy Demonstration project, we developed a low-cost in-situ biosampling device for separating wellbore-specific from reservoir-associated microbial community signals under reservoir-relevant conditions. The device containing representative rock fragments was deployed for 138 days in the reservoir well above sump and was episodically seeded with fresh reservoir fluids. While sump water sample was enriched with Methanosarcina, a legacy signal of earlier methanol ingress, biosampling device fractions were practically free of it. Notably, the hydrated rock fraction hosted a microbial community almost identical to the pre-disturbance baseline observed four years earlier, whereas non-saturated rock and chamber water reflect more transient, planktonic assemblages. We conclude that rock-associated sampling provides a complementary observational window by decoupling wellbore-specific legacy effects from reservoir-associated microbial structure, advancing subsurface microbial monitoring for underground energy storage technologies.

传统的地下气藏微生物采样通常依赖于储水池水，这可能会整合井筒特定的信号。作为碳循环经济示范项目的一部分，我们开发了一种低成本的原位生物采样装置，用于在油藏相关条件下分离井筒特有的微生物群落信号和油藏相关的微生物群落信号。该装置含有代表性的岩石碎片，在储水池上方的储层中放置了138天，并偶尔注入新鲜的储层流体。虽然污水样品富含甲醇酸，这是早期甲醇进入的遗留信号，但生物取样装置馏分实际上不含甲烷酸。值得注意的是，含水岩石部分的微生物群落与四年前观测到的扰动前基线几乎相同，而非饱和岩石和室内水则反映出更多的瞬态浮游生物组合。我们得出结论，岩石相关采样通过将井眼特定遗留效应与储层相关微生物结构解耦，提供了一个互补的观测窗口，推进了地下储能技术的地下微生物监测。

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引用次数: 0

Hierarchical heterostructure Ce/Co-N-C material as oxygen reduction catalyst for enhancing the electricity generation performance of microbial fuel cell 层次化异质结构Ce/Co-N-C材料作为氧还原催化剂提高微生物燃料电池发电性能

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153733

Demin Jiang , Dan Liao , Tong Yang , Liangjuan Zhu , Dongmei Shi , Mengge Zhao , Kun Xie , Xinrui Yang , Yan Xia , Shuwen Zeng , Xiaolong Cao , Yuan Xie

The sluggish kinetics of oxygen reduction reaction (ORR) greatly restrict the electricity generation performance of microbial fuel cell (MFC). Herein, we introduced Ce atoms in zeolitic-imidazole-framework-67 to construct Ce, Co, and N co-doped carbon (Ce/Co-N-C) catalyst through a practicable pyrolysis procedure. The co-doped Ce/Co atoms constructed bimetallic active centers and mutually regulated their electronic structure to provide an excellent ORR catalytic activity. The synergistic effect between bimetallic atoms promoted the internal carbon atoms outward migration for directional stacking in formation of graphitic carbon fiber nanotubes to interconnect the rhombic dodecahedral particles with each other. The interconnected hierarchical heterostructure enhanced the overall electrical conductivity of Ce/Co-N-C catalyst, which was conducive to facilitating the electrical energy output. The Ce/Co-N-C catalyst achieved a positive half-wave potential of 0.808 V and a low Tafel slope of 54.74 mV·dec⁻¹. The density functional theory calculations indicated that introducing Ce atoms into Co-N-C effectively regulated the electronic structures to break the symmetry of Co 3d orbitals, decrease the d-band center of Co sites, and promote the desorption of ∗OH, resulting in enhancing the ORR catalytic activity. In MFC practical applications, the open circuit voltage (0.767 ± 0.010 V) and maximum power density (4311.32 ± 102.96 mW m⁻²) of Ce/Co-N-C catalyst were higher than those of Pt/C catalyst (0.678 ± 0.044 V and 2987.94 ± 136.16 mW m⁻²), demonstrating an exceptional electricity generation performance. These superior performance highlights the potential advantage of Ce/Co-N-C catalyst in the future MFC large-scale applications.

氧还原反应动力学迟缓严重制约了微生物燃料电池（MFC）的发电性能。在此，我们将Ce原子引入沸石-咪唑-框架-67中，通过可行的热解过程构建Ce， Co和N共掺杂碳（Ce/Co-N- c）催化剂。共掺杂的Ce/Co原子构建了双金属活性中心，并相互调节其电子结构，提供了优异的ORR催化活性。双金属原子之间的协同作用促进了内部碳原子向外迁移，形成石墨碳纤维纳米管，使菱形十二面体粒子相互连接。互连的分层异质结构提高了Ce/Co-N-C催化剂的整体电导率，有利于促进电能输出。Ce/Co-N-C催化剂的正半波电位为0.808 V， Tafel斜率为54.74 mV·dec−1。密度泛函理论计算表明，在Co- n - c中引入Ce原子可有效调节Co三维轨道的电子结构，破坏Co三维轨道的对称性，降低Co位的d带中心，促进* OH的解吸，从而提高ORR催化活性。在MFC实际应用中，Ce/Co-N-C催化剂的开路电压（0.767±0.010 V）和最大功率密度（4311.32±102.96 mW m−2）均高于Pt/C催化剂（0.678±0.044 V和2987.94±136.16 mW m−2），表现出优异的发电性能。这些优异的性能凸显了Ce/Co-N-C催化剂在未来MFC大规模应用中的潜在优势。

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引用次数: 0

Strategic and scalable green ammonia deployment in Africa: Leveraging wind-solar resources and transport networks 在非洲战略性和可扩展的绿色氨部署：利用风能和太阳能资源和运输网络

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153542

Abdoulkader Ibrahim Idriss , Ramadan Ali Ahmed , Hamda Abdi Atteye , Mamadou Simina Drame , Haitham S. Ramadan

Sub-Saharan Africa faces persistent energy deficits despite abundant renewable resources, with the Horn of Africa offering exceptional potential for transformation through green ammonia (NH₃) production. This study presents a comprehensive techno-economic assessment across four strategic sites: Ghoubet (Djibouti), Asmara (Eritrea), Addis Abeba (Ethiopia) and Mogadishu (Somalia). The specific contributions include: (i) comparative analysis of wind- and solar-based production systems, (ii) evaluation of alkaline electrolyzer efficiency impacts (50–66 kWh/kg), (iii) detailed LCOA assessment across investment scenario (2500–3000 kW), (iv) uncertainty and sensitive analysis over a 20-year horizon, (v) spatial mapping of production potential and (vi) multimodal transport logistics evaluation. Wind-based systems demonstrate superior performance, with Ghoubet achieving the highest output (1237 tons/year) at 50 kWh/kg electrolyzer consumption. Asmara leads in solar-based production (402 tons/year). Economic analysis indicates that Mogadishu and Ghoubet achieve the shortest payback periods (1.03 and 1.35 years, respectively). A 50 % production increase could reduce LCOA from 1195 to 438 $/tons in Djibouti. Furthermore, transport logistics significantly influence competitiveness: Ghoubet's multimodal connectivity provides the lowest wind-based export cost (740 $/tons). These results underscore the strategic importance of integrated renewable production and transport infrastructure for enabling cost-effective green ammonia production as a clean fuel, energy carrier and sustainable fertilizer.

尽管可再生资源丰富，但撒哈拉以南非洲地区仍面临持续的能源短缺，非洲之角通过绿色氨（NH3）生产提供了巨大的转型潜力。本研究对四个战略要地：古贝特（吉布提）、阿斯马拉（厄立特里亚）、亚的斯亚贝巴（埃塞俄比亚）和摩加迪沙（索马里）进行了全面的技术经济评估。具体贡献包括：(i)风能和太阳能生产系统的比较分析，（ii）碱性电解槽效率影响的评估（50-66千瓦时/公斤），（iii）跨投资情景（2500-3000千瓦）的详细LCOA评估，（iv） 20年范围内的不确定性和敏感性分析，(v)生产潜力的空间映射和（vi）多式联运物流评估。基于风力的系统表现出卓越的性能，Ghoubet在50千瓦时/公斤电解槽消耗下实现了最高产量（1237吨/年）。阿斯马拉在太阳能生产方面领先（402吨/年）。经济分析表明，摩加迪沙和古贝特的投资回收期最短（分别为1.03年和1.35年）。如果产量增加50%，吉布提的LCOA将从每吨1195美元降至438美元。此外，运输物流显著影响竞争力：古贝特的多式联运提供了最低的风电出口成本（740美元/吨）。这些结果强调了综合可再生生产和运输基础设施对于实现具有成本效益的绿色氨生产作为清洁燃料，能源载体和可持续肥料的战略重要性。

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引用次数: 0

Process integration and optimization of green ammonia synthesis under fluctuating renewable energy supply 波动可再生能源条件下的绿色合成氨工艺集成与优化

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-01-29 DOI: 10.1016/j.ijhydene.2026.153736

Zicheng Xu , Shida Gao , Kangkang Feng , Yefei Liu , Jian Chu , Cuimei Bo

The ammonia industry, characterized by high energy consumption and significant emissions, urgently requires a transition towards low-carbon operations. The green hydrogen-driven pathway is widely recognized as the core approach for its decarbonization. However, this pathway is constrained by the inherent intermittency and volatility of renewable energy, making it difficult to integrate with conventional ammonia synthesis processes. To address this challenge, this study designs a multi-objective integrated optimization framework for a green hydrogen-driven ammonia synthesis process powered by a hybrid wind–solar energy system. Initially, a hydrogen production model was developed, followed by a quantitative analysis of regional wind and solar resource characteristics to establish weighting factors for multiple operational scenarios. Subsequently, a steady-state model of the ammonia synthesis process was constructed, and the reactor configuration was optimized with the objective of maximizing the weighted ammonia conversion rate. The diameters corresponding to reactors R101, R102, and R103 at the maximum weighted conversion rate of 33.378% are 2 m, 2.5 m, and 3 m, respectively, with corresponding lengths of 3.236 m, 4.045 m, and 4.854 m. Then, to address the challenges of renewable energy fluctuations and inevitable process carbon emissions, an optimization model aiming to maximize ammonia production while minimizing carbon emissions was established. The optimal operation parameters under various conditions were determined using the Non-dominated Sorting Genetic Algorithm II (NSGA-II) coupled with a multi-criteria decision-making method that integrates the entropy weight method and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). The results demonstrate that, compared to the default parameters, the optimized process achieved a 33.09% reduction in carbon emissions alongside a 2.45% increase in ammonia production. Finally, control strategies for the dynamic model were designed, and the optimal operating point was applied to the dynamic simulation.

合成氨行业具有高能耗、高排放的特点，迫切需要向低碳运营转型。绿色氢驱动途径被广泛认为是其脱碳的核心途径。然而，这一途径受到可再生能源固有的间歇性和波动性的限制，难以与传统的氨合成工艺相结合。为了解决这一挑战，本研究设计了一个多目标集成优化框架，用于由风能-太阳能混合系统驱动的绿色氢驱动氨合成过程。首先，开发了氢气生产模型，然后对区域风能和太阳能资源特征进行定量分析，以建立多种操作场景的权重因子。随后，建立了氨合成过程的稳态模型，并以加权氨转化率最大化为目标对反应器配置进行了优化。加权转化率最大为33.378%时，反应器R101、R102和R103对应的直径分别为2 m、2.5 m和3 m，对应的长度分别为3.236 m、4.045 m和4.854 m。然后，针对可再生能源波动和不可避免的过程碳排放的挑战，建立了以氨产量最大化、碳排放最小化为目标的优化模型。采用非支配排序遗传算法II （NSGA-II）结合熵权法和TOPSIS （Order Preference by Similarity to Ideal Solution）的多准则决策方法确定各工况下的最优运行参数。结果表明，与默认参数相比，优化后的工艺碳排放量减少了33.09%，氨产量增加了2.45%。最后，设计了动态模型的控制策略，并将最优工作点应用于动态仿真。

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