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

Techno-economic analysis of green hydrogen production from wind and solar along CPEC special economic zones in Pakistan 巴基斯坦中巴经济走廊经济特区风能和太阳能绿色制氢的技术经济分析

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.140

Joshi Laila , Mustafa Anwar , Muhammad Hassan , Syed Ali Abbas Kazmi , Rizwan Ali , Muhammed Ali S.A. , Muhammad Zeeshan Rafique

Hydrogen-based systems are garnering attention as part of efforts to achieve low-carbon emissions and net-zero targets. In developing countries, natural gas and coal serve as a primary source for hydrogen production, given their accessibility and cost-effectiveness. Green hydrogen presents a promising clean energy solution with significant potential to decarbonize the industrial sector. In this article, a techno-economic analysis has been performed for green hydrogen production using wind and solar as primary energy sources. The analysis is conducted at nine special economic zones (SEZs) and a free zone at Gwadar Sea Port using the Hybrid Optimization of Multiple Energy Resources (HOMER) Pro software. A hybrid energy system has been designed to meet the industrial electrical and hydrogen demand of 600 MWh/day and 60 tonnes H₂ per day, respectively. A comparative analysis of on-grid and off-grid systems across all SEZs is performed for the optimal system. A sensitivity analysis is conducted on different parameters that could impact the levelized cost of hydrogen (LCOH). The results indicate that LCOH varies from 4.19 $/kg to 8.66 $/kg for off-grid and 2.12 $/kg to 4.65 $/kg for on-grid systems which is a competitive cost to other countries. The most feasible economic zones for green hydrogen production are found to be Dhabeji and Port Qasim with the lowest LCOH of 4.19 $/kg and 4.22 $/kg for off-grid, 2.12 $/kg and 2.36 $/kg for the grid-connected system, respectively. Dhabeji also exhibits the lowest CO₂ emissions per year making itself the most feasible location for green hydrogen production. Grid-connected systems are a great opportunity for Pakistan to produce low-cost green hydrogen for industrial decarbonization and the country’s economic growth.

作为实现低碳排放和净零排放目标的一部分，氢基系统正受到关注。在发展中国家，由于天然气和煤炭的可获得性和成本效益，它们是生产氢气的主要来源。绿色氢是一种有前途的清洁能源解决方案，具有使工业部门脱碳的巨大潜力。本文对以风能和太阳能为主要能源的绿色制氢进行了技术经济分析。该分析是在九个经济特区（SEZs）和瓜达尔港的一个自由区使用多种能源混合优化（HOMER） Pro软件进行的。设计了一个混合能源系统，分别满足600兆瓦时/天和60吨H2 /天的工业电力和氢气需求。对所有经济特区的并网和离网系统进行了比较分析，以确定最优系统。对影响氢气平准化成本的不同参数进行了敏感性分析。结果表明，离网系统的LCOH从4.19美元/公斤到8.66美元/公斤不等，并网系统的LCOH从2.12美元/公斤到4.65美元/公斤不等，这对其他国家来说是具有竞争力的成本。最可行的绿色制氢经济区是Dhabeji和Port Qasim，离网系统的LCOH最低，分别为4.19美元/kg和4.22美元/kg，并网系统的LCOH最低，分别为2.12美元/kg和2.36美元/kg。达贝吉每年的二氧化碳排放量也最低，这使它成为绿色氢气生产最可行的地点。并网系统是巴基斯坦为工业脱碳和国家经济增长生产低成本绿色氢的绝佳机会。

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引用次数: 0

Addressing NOX formation mechanisms of NH3/H2 dual-fuel flame under DBD plasma-assisted combustion resolved by intermediate radicals analysis 用中间自由基分析解决DBD等离子体辅助燃烧下NH3/H2双燃料火焰NOX形成机理

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.346

Kai Deng , Aidi He , Shiheng Ye , Wentao Lin , Weiwei Kang , Qinglu Lin , Junjie Zhu , Zhirong Liang

In order to attain carbon-neutrality, the implementation of zero-carbon fuel containing ammonia (NH₃)/hydrogen (H₂) has become more and more practically popular. This work focuses on addressing the combustion performance and nitrogen oxide (NO_X) formation mechanisms of dielectric barrier discharge (DBD) plasma-assisted NH₃/H₂ dual-fuel flames at varied plasma voltages (V_AC) and hydrogen ratios (Z_H2), which were resolved by PLIF and chemiluminescence techniques concurrently. The analytical results obtained show that V_AC had positive effectiveness on contributing to NO_X emissions with a threshold of V_AC = 11 kV found for triggering NO_X formation. With V_AC increased from 11 kV to 12.5 kV constantly, NO_X grew dramatically by 8.3%–12.3% (Z_H2 elevated from 0.2 to 0.3). This phenomenon was mainly because of the growing propagation of OH radicals being faster than that of NH₂ radicals. Besides, three NO_X formation regions, including low-formation region, medium-formation region and high-formation region were determined, which essentially reflected that hydrogen ratio predominated over discharge voltage on forming NOx. Moreover, the inter-relationship between flame surface density (FSD, revealing combustion intensity) and NO_X has been comprehensively explored. And high DBD-V_AC (with low hydrogen blending ratio) was found to significantly promote the FSD resulting in better combustion intensity, but caused inappreciable NO_X formation. In upcoming future application, high voltage of DBD plasma could be utilized for replacing high hydrogen blending ratio in ammonia/hydrogen combustion, to obtain promotional combustion intensity with effective NO_X control.

为了实现碳中和，采用含氨(NH3)/氢（H2）的零碳燃料在实践中越来越受欢迎。本文重点研究了介质阻挡放电（DBD）等离子体辅助NH3/H2双燃料火焰在不同等离子体电压（VAC）和氢比（ZH2）下的燃烧性能和氮氧化物（NOX）形成机制，并利用PLIF和化学发光技术同时解决了这一问题。得到的分析结果表明，VAC对NOX排放有积极的促进作用，其触发NOX形成的阈值为VAC = 11 kV。随着VAC从11 kV不断增加到12.5 kV， NOX急剧增长8.3% ~ 12.3% （ZH2从0.2增加到0.3）。这种现象主要是由于OH自由基的生长传播速度快于NH2自由基。此外，还确定了低生成区、中生成区和高生成区三个NOX生成区域，本质上反映了氢气比对NOX生成的影响大于放电电压。此外，火焰表面密度（FSD，暴露燃烧强度）与NOX之间的相互关系也得到了全面的探讨。高DBD-VAC（低配氢比）显著促进了FSD，燃烧强度较好，但NOX生成不明显。在未来的应用中，可以利用DBD等离子体的高电压来取代氨氢燃烧中的高掺氢比，以获得有效控制NOX的促进燃烧强度。

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引用次数: 0

Anaerobic decomposition of substandard pet food as a raw material source for producing hydrogen from methane 对不合格宠物食品进行厌氧分解，作为甲烷制氢的原料来源

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.306

S.N. Gaydamaka , M.A. Gladchenko , I.V. Kornilov , M.N. Ryazanov , M.A. Gerasimov , A.A. Kornilova

A potential raw material for producing hydrogen (the main carrier for the accumulation, storage and transportation of energy) is methane from biogas. An approach to producing biogas with a high methane content (69–72%) from waste commercial dry and wet food for dogs and cats under mesophilic conditions has been demonstrated. For 27–28 days under anaerobic conditions, the degree of biotransformation of waste was 60–88%. As a result of mineralization of watered organic waste, the content of ammonium nitrogen and phosphorus in the form of phosphates amounted to 676–887 mgNH₄⁺/l and 77–160 mgPO₄^3-/l, respectively. In anaerobically treated effluent, accumulation of sulfide ions up to 22 mg/l was observed. The solid sediment and anaerobically treated effluent (liquid fraction) obtained upon completion of the biotransformation of pet food waste are a potential organic fertilizer for agricultural needs, and methane from biogas is a raw material for producing hydrogen and pure carbon for the needs of the nanoindustry.

生产氢气（能量积累、储存和运输的主要载体）的潜在原料是沼气。在中温环境下，利用商业干湿食物废料为狗和猫生产甲烷含量高（69-72%）的沼气的方法已经得到证实。在厌氧条件下27 ~ 28 d，废弃物的生物转化率为60 ~ 88%。水处理有机废弃物由于矿化，以磷酸盐形式存在的铵态氮和磷含量分别为676 ~ 887 mgNH4+/l和77 ~ 160 mgPO43-/l。在厌氧处理的废水中，观察到硫化物离子的积累高达22毫克/升。在完成宠物食品垃圾的生物转化后获得的固体沉积物和厌氧处理的废水（液体部分）是农业需求的潜在有机肥料，沼气中的甲烷是生产氢和纯碳的原料，用于纳米工业的需求。

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引用次数: 0

Advanced iridium catalysts on multi-porous tantalum oxide supports for efficient proton exchange membrane water electrolysis 多孔氧化钽载体上的先进铱催化剂用于高效质子交换膜电解

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.405

Je Yeon Choi, Jong Gyeong Kim, Hyung Joo Lee, Chanho Pak

Reducing the loading of precious metals such as Ir and Pt while maintaining the performance of membrane electrode assembly (MEA) with highly active oxygen evolution reaction (OER) catalysts is a significant challenge in the development of efficient proton exchange membrane water electrolyzers (PEMWEs). This study presents a highly active and cost-effective catalyst consisting of iridium supported on multi-porous tantalum oxide (M−Ta₂O₅), which integrates both macropores and mesopores. The iridium nanostructures supported on the M−Ta₂O₅ enhance the utilization of Ir and exhibit larger electrochemical surface areas. With a 30 wt% Ir loading, the Ir/M−Ta₂O₅ catalyst demonstrates an overpotential of 290.4 ± 3.5 mV at a current density of 10 mA cm⁻² and a mass activity of 730.5 ± 44.6 A g_Ir⁻¹ at 1.55 V_RHE. Consequently, Ir/M−Ta₂O₅ can be effectively utilized to fabricate MEA with an Ir loading of 0.2 mg cm⁻² and Nafion® 115 membrane. At the single-cell level, this catalyst achieves a current density of 2.5 A cm⁻² at 1.89 V, underscoring the potential of Ir/M−Ta₂O₅ as a highly efficient and cost-affordable OER catalyst. This work highlights the promise of Ir/M−Ta₂O₅ in reducing the reliance on precious metals, thereby contributing to the economic and environmental sustainability of PEMWEs.

如何在保持膜电极组件（MEA）性能的同时减少Ir和Pt等贵金属的负载，是开发高效质子交换膜水电解槽（PEMWEs）面临的重大挑战。本研究提出了一种高活性和经济高效的催化剂，由铱支撑在多孔氧化钽（M - Ta₂O₅）上，它集成了大孔和介孔。在M−Ta2O5上负载的铱纳米结构提高了Ir的利用率，并表现出更大的电化学表面积。Ir负载为30 wt%时，Ir/M - Ta₂O₅催化剂在电流密度为10 mA cm⁻2时的过电位为290.4±3.5 mV，在1.55 VRHE时的质量活度为7305±44.6 a gIr⁻1。因此，Ir/M - Ta2O5可以有效地用于制备Ir负载为0.2 mg cm - 2的MEA和Nafion®115膜。在单电池水平上，该催化剂在1.89 V下达到2.5 a cm⁻2的电流密度，强调了Ir/M−Ta2O5作为高效且经济实惠的OER催化剂的潜力。这项工作突出了Ir/M - Ta₂O₅在减少对贵金属的依赖方面的承诺，从而有助于PEMWEs的经济和环境可持续性。

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引用次数: 0

Kinetic study of microwave heating-assisted chemical looping dry reforming of methane over magnetite 微波加热辅助甲烷在磁铁矿上化学环干重整的动力学研究

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.358

Mohammad Khodabandehloo , Jaber Shabanian , Jean-Phillipe Harvey , Jamal Chaouki

Dry reforming of methane carried out via the chemical looping concept and employing microwave heating is a sustainable syngas (a mixture comprising hydrogen and carbon monoxide) production technology. Understanding the intrinsic reaction kinetics of reduction and oxidation is essential for successful scale-up of this technology. By employing magnetite as a microwave absorber oxygen carrier, we investigated the reaction kinetics at bulk temperatures in the range of 650–800 °C for reduction and 500–650 °C for oxidation. Results indicated both reactions followed a phase-boundary controlled (contracting sphere) reaction mechanism. Upon developing the reaction kinetics based on solid temperature relevant to microwave-heated particles, we estimated the activation energy to be 85 kJ/mol for the reduction reaction and 22 kJ/mol for the oxidation reaction. By developing the reaction kinetic of the reduction under microwave heating and based on bulk temperature, we estimated 68 kJ/mol as the activation energy of the reduction reaction. Comparing these values with the activation energy of magnetite reduction by methane under conventional heating (around 90 kJ/mol) indicated that microwave irradiation apparently decreased the activation energy. Consequently, by developing the reaction kinetics based on an appropriate temperature, i.e., solid temperature, we demonstrated that microwave primarily had a thermal effect in our study, increasing the reaction rate constant, rather than a non-thermal effect, like altering the activation energy.

通过化学循环概念和微波加热进行的甲烷干重整是一种可持续的合成气（由氢和一氧化碳组成的混合物）生产技术。了解还原和氧化的内在反应动力学是成功扩大该技术规模的必要条件。采用磁铁矿作为微波吸收体氧载体，研究了在本体温度650 ~ 800℃还原和500 ~ 650℃氧化条件下的反应动力学。结果表明，两种反应均符合相界控制（收缩球）反应机理。根据微波加热颗粒的固体温度对反应动力学的影响，我们估计还原反应的活化能为85 kJ/mol，氧化反应的活化能为22 kJ/mol。通过对微波加热下还原反应动力学的研究，以体温为基础，估计还原反应的活化能为68 kJ/mol。与传统加热条件下甲烷还原磁铁矿的活化能（约90 kJ/mol）相比，微波辐照明显降低了磁铁矿的活化能。因此，通过建立在适当温度（即固体温度）基础上的反应动力学，我们证明了微波在我们的研究中主要具有热效应，增加反应速率常数，而不是非热效应，如改变活化能。

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引用次数: 0

Investigation of oxygen transport in porous transport layer with different porosity gradient configurations using phase field method 用相场法研究不同孔隙度梯度配置的多孔输运层中氧的输运

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.260

Shengyong Zhao , Peng Li , Siyuan Huang , Yingshuang Yan , Zilong Liu , Zhengpeng Duan , Lanlan Cai

Minimizing oxygen accumulation in the porous transport layer (PTL) is crucial for reducing mass transfer losses in proton exchange membrane (PEM) electrolyzer. This study develops a two-dimensional transient model of gas-liquid two-phase flow at the anode of PEM electrolyzer using the phase field method. The model investigates the mechanisms of oxygen transport and the interactions among various oxygen paths in PEM electrolyzer. We explore the impact of porosity gradient configurations in the PTL and the presence of a surface microporous layer (MPL) on oxygen transport. The findings indicate that for PTL with an average porosity of 60%, forward gradient configuration—where porosity increases from the catalyst layer (CL) towards the channel (CH)—promotes the merging of bubble sites and path contraction, thereby reducing oxygen saturation. The optimal gradient configuration, with porosities of 50% at the CL and 70% at the CH, achieves a 29.5% reduction in oxygen saturation. Conversely, reverse gradient configuration, with decreasing porosity from CL to CH, results in increased oxygen saturation. The addition of surface MPL further lowers oxygen saturation and shortens oxygen breakthrough time; smaller MPL particle sizes correspond to lower oxygen saturation and shorter breakthrough times. This study provides valuable insights for the optimal design of PTL structures in PEM electrolyzers.

在质子交换膜（PEM）电解槽中，减少多孔传输层（PTL）中的氧积累是降低传质损失的关键。采用相场法建立了PEM电解槽阳极气液两相流动的二维瞬态模型。该模型研究了PEM电解槽中氧的输运机制以及各种氧路径之间的相互作用。我们探索了PTL中孔隙度梯度配置和表面微孔层（MPL）的存在对氧传输的影响。研究结果表明，对于平均孔隙度为60%的PTL，正向梯度结构（孔隙度从催化剂层（CL）向通道（CH）增加）促进了气泡位点的合并和路径收缩，从而降低了氧饱和度。在最佳梯度配置下，低碳层的孔隙率为50%，低碳层的孔隙率为70%，氧饱和度降低了29.5%。相反，相反的梯度结构，从CL到CH孔隙度降低，导致氧饱和度增加。表面MPL的加入进一步降低了氧饱和度，缩短了破氧时间；MPL粒径越小，氧饱和度越低，突破时间越短。该研究为PEM电解槽PTL结构的优化设计提供了有价值的见解。

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引用次数: 0

Innovative automatic optimization method for ejectors in fuel cell vehicles based on a combined optimization strategy 基于组合优化策略的新型燃料电池汽车喷射器自动优化方法

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.382

Chao Li, Jianqin Fu, Yaorui Shen, Yuting Huang

Ejectors exhibit significant advantages in the field of fuel cell vehicles, playing a crucial role in promoting their development. Their fixed structure results in non-parasitic power consumption, yet this also poses greater challenges for optimizing their structural parameters across different application scenarios. However, most of the research focuses on the positions such as the nozzle and mixing section, and there is no effective method to determine the values of all parameters. In order to solve the above problems, an innovative automatic optimization method using a combined optimization strategy (COS) with a weight factor is proposed for achieving multi-objective optimization of ejectors. The COS combines parametric modeling, computational fluid dynamics, approximate modeling techniques, and multi-objective optimization to tune the full parameters. The results indicate that the COS achieves a high performance prediction accuracy with an R² value of 0.9711 and a root mean square error of 9.23E-6. Furthermore, in the case of 300 computational samples, the computational time is reduced by 54.7%. The entrainment ratio has been increased to 4.17 times its pre-optimization level. The novel method not only ensures the simulation accuracy but also significantly enhances computational efficiency, making it a powerful tool for guiding the production and optimization of ejectors.

喷射器在燃料电池汽车领域具有显著的优势，对燃料电池汽车的发展起着至关重要的作用。它们的固定结构导致了非寄生功耗，但这也为优化不同应用场景下的结构参数带来了更大的挑战。然而，大多数研究都集中在喷嘴和混合段等位置，没有有效的方法来确定所有参数的值。为解决上述问题，提出了一种基于权重因子的组合优化策略的自动优化方法，实现了弹射器的多目标优化。COS结合了参数化建模、计算流体动力学、近似建模技术和多目标优化来调整全部参数。结果表明，COS具有较高的预测精度，R2值为0.9711，均方根误差为9.23E-6。在300个计算样本的情况下，计算时间减少了54.7%。夹带比提高到优化前的4.17倍。该方法不仅保证了仿真精度，而且显著提高了计算效率，是指导喷射器生产和优化的有力工具。

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引用次数: 0

Improving syngas yield and quality from biomass/coal co-gasification using cooperative game theory and local interpretable model-agnostic explanations 利用合作博弈论和局部可解释模型不可知的解释提高生物质/煤共气化合成气产量和质量

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.329

Cristina Efremov , Thanh Tuan Le , Prabhu Paramasivam , Krzysztof Rudzki , Sameh Muhammad Osman , Thanh Hieu Chau

The co-gasification of waste biomass and low-quality coal to produce syngas as fuel is an effective and sustainable approach in the waste-to-energy paradigm. The modeling of this process is however complex and time-consuming. The data-driven machine learning (ML) approaches enhanced with explainable artificial intelligence (XAI) are capable of solving this issue. Hence, in this study, five different ML techniques including Linear Regression (LR), Support Vector Regression (SVR), Gaussian Process Regression (GPR), Extreme Gradient Boosting (XGBoost), and Categorical Boosting (CatBoost) were employed for the model-prediction. The ultimate analysis, proximate analysis, and operation setting data were employed for the control factors syngas yield and lower heating value (LHV) prediction. The prediction results showed that XGBoost was superior to other ML approaches with an R² value of 0.9786, mean squared error (MSE) of 10.82, and mean absolute percentage error (MAPE) of 9.8% during model testing of the syngas yield model. In the case of the syngas LHV model an R² value of 0.9992, MSE of 0.03, and MAPE of 0.83% was observed. XGBoost was superior for both syngas yield and LHV models. The analysis of feature importance and its quantification was conducted by Shapley Additive Explanations (SHAP) and Local Interpretable Model-agnostic Explanations (LIME). SHAP and LIME approaches revealed that reaction temperature and biomass mixing ratio were the most important control factors for the syngas yield model.

废生物质与低质量煤共气化生产合成气作为燃料是废物转化能源模式中一种有效和可持续的方法。然而，这个过程的建模是复杂和耗时的。通过可解释的人工智能（XAI）增强的数据驱动机器学习（ML）方法能够解决这个问题。因此，本研究采用线性回归（LR）、支持向量回归（SVR）、高斯过程回归（GPR）、极端梯度增强（XGBoost）和分类增强（CatBoost）五种不同的机器学习技术进行模型预测。利用最终分析、近似分析和运行设定数据对控制因素合成气产率和低热值（LHV）进行了预测。结果表明，在合成气产率模型的模型检验中，XGBoost预测的R2值为0.9786，均方误差（MSE）为10.82，平均绝对百分比误差（MAPE）为9.8%，优于其他ML方法。合成气LHV模型的R2值为0.9992，MSE为0.03，MAPE为0.83%。XGBoost在合成气产率和LHV模型上都具有优势。采用Shapley加性解释（SHAP）和局部可解释模型不可知论解释（LIME）对特征重要性进行分析和量化。SHAP和LIME方法表明，反应温度和生物质混合比例是合成气产率模型最重要的控制因素。

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引用次数: 0

Technoeconomic analysis of supercritical water gasification of canola straw for hydrogen production 油菜秸秆超临界水气化制氢技术经济分析

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.088

Kapil Khandelwal, Castaneda S. German, Ajay K. Dalai

Production of hydrogen from renewable sources is gaining popularity to reduce our dependency on non-renewable fossil fuels to meet growing hydrogen demand. However, despite the great prospect of production of hydrogen from sustainable sources such as lignocellulosic biomass via supercritical water gasification (SCWG), it has not been commercialized at a large industrial scale. This is due to the lack of detailed economic analysis of SCWG of lignocellulosic biomass, owing to the complexity of the SCWG process and the heterogeneous nature of biomass. Therefore, to address this knowledge gap, in this study, a detailed technoeconomic analysis (TEA) of a conceptual SCWG pilot having the capacity to process 200 tons/day of canola straw for the production of green hydrogen was conducted. Mass and energy balance of conceptual pilot was performed using Aspen Plus ® simulation by utilizing experimental data and hydrogen yield of 41.62 mmol/g was obtained at optimized reaction conditions of 500 °C, 23 MPa, and 10 wt%. Economic analysis based on calculated mass and energy balance was performed using SuperPro software. Cash flow analysis for capital expenses (CAPEX) of 81 Million USD showed a high internal rate of return (IRR) of 38.9% and an undiscounted net present value (NPV) of 548 million USD. A minimum selling price (MSP) of 3.38 USD/kg H₂ for produced hydrogen was estimated, which is lower than other renewable hydrogen production processes and comparable to non-renewable hydrogen production technologies. A high positive IRR and NPV, while a lower MSP showed that despite having a low technological readiness level (TRL) of 4, SCWG of lignocellulosic biomass is a technically feasible and economically viable process for the production of hydrogen. Furthermore, sensitivity analysis also revealed that capital expenses (CAPEX) and canola straw price had the highest influence on net present value (NPV) and MSP. However, overall NPV and MSP were highly stable to changes in parameters highlighting the robustness of the economic analysis.

利用可再生能源生产氢气越来越受欢迎，以减少我们对不可再生化石燃料的依赖，以满足日益增长的氢气需求。然而，尽管通过超临界水气化（SCWG）从可持续来源（如木质纤维素生物质）生产氢气的前景广阔，但它尚未在大规模工业规模上商业化。这是由于缺乏木质纤维素生物质的SCWG详细的经济分析，由于SCWG过程的复杂性和生物质的异质性。因此，为了解决这一知识差距，在本研究中，对一个概念性SCWG试点进行了详细的技术经济分析（TEA），该试点能够处理200吨/天的油菜籽秸秆以生产绿色氢。利用实验数据，利用Aspen Plus®模拟进行概念中试物的质能平衡，在500°C、23 MPa、10 wt%的优化反应条件下，氢气产率为41.62 mmol/g。利用SuperPro软件进行了基于计算的质量和能量平衡的经济分析。资本支出（CAPEX）为8100万美元的现金流分析显示，内部收益率（IRR）高达38.9%，未贴现净现值（NPV）为5.48亿美元。据估计，生产氢气的最低销售价格（MSP）为3.38美元/千克氢气，低于其他可再生制氢工艺，与不可再生制氢技术相当。较高的正IRR和NPV，而较低的MSP表明，尽管技术准备水平（TRL）较低，但木质纤维素生物质的SCWG在技术上和经济上都是可行的制氢工艺。此外，敏感性分析还显示，资本支出（CAPEX）和油菜秸秆价格对净现值（NPV）和MSP的影响最大。然而，总体NPV和MSP对参数的变化高度稳定，突出了经济分析的稳健性。

{"title":"Technoeconomic analysis of supercritical water gasification of canola straw for hydrogen production","authors":"Kapil Khandelwal, Castaneda S. German, Ajay K. Dalai","doi":"10.1016/j.ijhydene.2024.11.088","DOIUrl":"10.1016/j.ijhydene.2024.11.088","url":null,"abstract":"<div><div>Production of hydrogen from renewable sources is gaining popularity to reduce our dependency on non-renewable fossil fuels to meet growing hydrogen demand. However, despite the great prospect of production of hydrogen from sustainable sources such as lignocellulosic biomass via supercritical water gasification (SCWG), it has not been commercialized at a large industrial scale. This is due to the lack of detailed economic analysis of SCWG of lignocellulosic biomass, owing to the complexity of the SCWG process and the heterogeneous nature of biomass. Therefore, to address this knowledge gap, in this study, a detailed technoeconomic analysis (TEA) of a conceptual SCWG pilot having the capacity to process 200 tons/day of canola straw for the production of green hydrogen was conducted. Mass and energy balance of conceptual pilot was performed using Aspen Plus ® simulation by utilizing experimental data and hydrogen yield of 41.62 mmol/g was obtained at optimized reaction conditions of 500 °C, 23 MPa, and 10 wt%. Economic analysis based on calculated mass and energy balance was performed using SuperPro software. Cash flow analysis for capital expenses (CAPEX) of 81 Million USD showed a high internal rate of return (IRR) of 38.9% and an undiscounted net present value (NPV) of 548 million USD. A minimum selling price (MSP) of 3.38 USD/kg H<sub>2</sub> for produced hydrogen was estimated, which is lower than other renewable hydrogen production processes and comparable to non-renewable hydrogen production technologies. A high positive IRR and NPV, while a lower MSP showed that despite having a low technological readiness level (TRL) of 4, SCWG of lignocellulosic biomass is a technically feasible and economically viable process for the production of hydrogen. Furthermore, sensitivity analysis also revealed that capital expenses (CAPEX) and canola straw price had the highest influence on net present value (NPV) and MSP. However, overall NPV and MSP were highly stable to changes in parameters highlighting the robustness of the economic analysis.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"96 ","pages":"Pages 1067-1078"},"PeriodicalIF":8.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744540","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

Mechanistic insights into the use of flotation tail coal for enhanced water electrolysis in hydrogen production 利用浮选尾煤加强水电解制氢的机理研究

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-28 DOI: 10.1016/j.ijhydene.2024.11.407

Huiyu Shang , Fan Yu , Xuesong Yang , Yaowen Xing , Xiahui Gui

Coal-assisted water electrolysis for hydrogen production (CAWE) is a promising method for the efficient utilization of coal resources and the sustainable generation of hydrogen. However, identifying a cost-effective and efficient carbon source remains a critical and ongoing challenge. This study proposes the use of flotation tail coal as a novel and efficient carbon source for water electrolysis. Through a combination of electrochemical experiments, thermodynamic analysis, and comprehensive material characterization techniques, this research explores the effectiveness of tail coal-assisted water electrolysis for hydrogen production (TCAWE) in enhancing hydrogen production efficiency. It is found that the catalytic effect of minerals, particularly iron and manganese ions, is instrumental in significantly reducing energy consumption and enhancing the anodic oxidation reactions in the CAWE process. Flotation tail coal, with its high content of these catalytic minerals and favorable hydrophilic surface properties, not only lowers the electrolysis voltage but also increases the hydrogen yield compared to traditional coal sources. This research innovatively demonstrates that utilizing flotation tail coal in water electrolysis offers a dual benefit: it provides a cost-effective, abundant carbon source while promoting a more efficient and sustainable hydrogen production process. Additionally, this approach is expected to facilitate the resource utilization of waste flotation tail coal.

煤助水电解制氢（CAWE）是一种很有前途的高效利用煤炭资源和可持续生产氢气的方法。然而，确定一种具有成本效益和效率的碳源仍然是一项关键和持续的挑战。本研究提出利用浮选尾煤作为一种新型高效的电解水碳源。本研究通过电化学实验、热力学分析和综合材料表征技术相结合，探讨了尾煤辅助水电解制氢（TCAWE）在提高制氢效率方面的有效性。研究发现，矿物，特别是铁和锰离子的催化作用，在CAWE工艺中显著降低了能耗，增强了阳极氧化反应。与传统煤源相比，浮选尾煤具有较高的催化矿物含量和良好的亲水表面性能，不仅降低了电解电压，而且提高了产氢率。本研究创新性地证明了在水电解中利用浮选尾煤具有双重效益：它提供了一个具有成本效益的、丰富的碳源，同时促进了一个更高效和可持续的制氢过程。此外，该方法有望促进废浮选尾煤的资源化利用。

{"title":"Mechanistic insights into the use of flotation tail coal for enhanced water electrolysis in hydrogen production","authors":"Huiyu Shang , Fan Yu , Xuesong Yang , Yaowen Xing , Xiahui Gui","doi":"10.1016/j.ijhydene.2024.11.407","DOIUrl":"10.1016/j.ijhydene.2024.11.407","url":null,"abstract":"<div><div>Coal-assisted water electrolysis for hydrogen production (CAWE) is a promising method for the efficient utilization of coal resources and the sustainable generation of hydrogen. However, identifying a cost-effective and efficient carbon source remains a critical and ongoing challenge. This study proposes the use of flotation tail coal as a novel and efficient carbon source for water electrolysis. Through a combination of electrochemical experiments, thermodynamic analysis, and comprehensive material characterization techniques, this research explores the effectiveness of tail coal-assisted water electrolysis for hydrogen production (TCAWE) in enhancing hydrogen production efficiency. It is found that the catalytic effect of minerals, particularly iron and manganese ions, is instrumental in significantly reducing energy consumption and enhancing the anodic oxidation reactions in the CAWE process. Flotation tail coal, with its high content of these catalytic minerals and favorable hydrophilic surface properties, not only lowers the electrolysis voltage but also increases the hydrogen yield compared to traditional coal sources. This research innovatively demonstrates that utilizing flotation tail coal in water electrolysis offers a dual benefit: it provides a cost-effective, abundant carbon source while promoting a more efficient and sustainable hydrogen production process. Additionally, this approach is expected to facilitate the resource utilization of waste flotation tail coal.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"96 ","pages":"Pages 870-881"},"PeriodicalIF":8.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744541","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