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Journal of Energy Chemistry 2024年第6期93卷 352-360,I0009页

作者： Donghyun Yoon Sunki Chung Minjun Choi Eunhyeok Yang Jaeyoung Lee School of Earth Sciences and Environmental Engineering Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea International Future Research Center of Chemical Energy Storage and Conversion Processes GISTGwangju 61005Republic of Korea Ertl Center for Electrochemistry and Catalysis GISTGwangju 61005Republic of Korea TKG Huchems Co.Ltd 963Sangam-roYeosu-siJeollanam-do 59614Republic of Korea

Ammonia allows storage and transport of hydrogen over long distances and is an attractive potential hydrogen carrier.Electrochemical decomposition has recently been used for the conversion of ammonia to hydrogen and is regarded as a future technology for production of CO_(2)-free pure hydrogen.Herein,a heterostructural Pt-Ir dual-layer electrode is developed and shown to achieve successful long-term operation in an ammonia electrolyzer with an anion exchange membrane(AEM).This electrolyzer consisted of eight membra ne electrode assemblies(MEAs)with a total geometric area of 200 cm~2 on the anode side,which resulted in a hydrogen production rate of 25 L h~(-1).We observed the degradation in MEA performance attributed to changes in the anode catalyst layer during hydrogen production via ammonia electrolysis.Furthermore,we demonstrated the relationship between the ammonia oxidation reaction(AOR)and the oxygen evolution reaction(OER).

关键词： Ammonia oxidation Dual-layer catalyst green hydrogen Electrolytic process Oxygen evolution reaction

Advanced Thermochemical Conversion Approaches for green hydrogen Production from Crop Residues

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Journal of Renewable Materials 2024年第1期12卷 1-28页

作者： Omojola Awogbemi Ayotunde Adigun Ojo Samson Adedayo Adeleye Department of Mechanical Engineering Ekiti State UniversityAdo EkitiNigeria

The huge volumes of crop residues generated during the production,processing,and consumption of farm products constitute an ecological nuisance when ineffectively managed.The conversion of crop residues to green hydrogen is one of the sustainable management strategies for ubiquitous crop residues.Production of green hydrogen from crop residue sources will contribute to deepening access to clean and affordable energy,mitigating climate change,and ensuring environmental sustainability.However,the deployment of conventional thermochemical technologies for the conversion of crop residues to green hydrogen is costly,requires long residence time,produces low-quality products,and therefore needs to be upgraded.The current review examines the conventional,advanced,and integrated thermochemical conversion technologies for crop residues for green hydrogen production.After a brief overview of the conventional thermochemical techniques,the review delves into the broad narration of advanced thermochemical technologies including catalytic pyrolysis,microwave pyrolysis,co-pyrolysis,hyropyrolysis,and autothermal pyrolysis.The study advocates the deployment of integrated pyrolysis,anaerobic digestion,pyrolysis,and gasification technologies will ensure scalability,decomposition of recalcitrant feedstocks,and generation of high grade green hydrogen.The outlook provides suggestions for future research into cost-saving and sustainable integrated technologies for green hydrogen production towards achieving carbon neutrality and a circular bio-economy.

关键词： Crop residues carbon neutrality pyrolysis gasification green hydrogen thermochemical conversion

green hydrogen: Perspectives and Challenges in Using the Natural Gas Network in Ceará/Brazil

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Journal of Geoscience and Environment Protection 2024年第3期12卷 70-94页

作者： Francisco Alfredo de Castro Mona Lisa Moura de Oliveira Lutero Carmo de Lima Daniel Silveira Serra Science and Technology Center State University of Ceará Ceará Brazil Av. Dr. Silas Munguba 1700 Fortaleza-Ceará Brazil

Climate change, mainly caused by the use of non-renewable fuels, has raised global concerns and led to the search for less polluting energy sources, making hydrogen a promising energy alternative with the potential to contribute to changes in the energy mix of various countries through the use of technologies that enable its production and use with low or zero carbon emissions. In this context, Brazil has aroused great interest from other countries in exploring its renewable resources for the production of hydrogen (green hydrogen). In this sense, the use of natural gas pipelines and the use of hydrogen in mixtures with natural gas have become the subject of studies due to their economically viable alternative for the immediate use of this energy vector. However, there are still technical and regulatory challenges regarding the integration of hydrogen into the existing natural gas pipeline network. In this context, the present study aims to address the effects of hydrogen interaction with the structure of natural gas pipeline steel and the regulatory barriers to the use of this network for the transportation of green hydrogen, particularly in the state of Ceará/Brazil. After extensive analysis of literature and regulatory documents, it was concluded that: 1) Ceará/Brazil has strong potential to meet the demand for green hydrogen through the use of solar and wind energy sources;2) there is feasibility for the adaptation or conversion of natural gas infrastructure for the transportation of green hydrogen;3) discussions regarding the regulatory competence of green hydrogen transportation and distribution through the natural gas network in Brazil are still incipient;4) the current regulation of the natural gas industry can serve as a subsidy for the regulation of green hydrogen and natural gas transportation.

关键词： Decarbonization Natural Gas green hydrogen Pipelines

Techno-economic analysis of green hydrogen as an energy-storage medium for commercial buildings

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Clean Energy 2023年第1期7卷 84-98页

作者： Rahul Rajeevkumar Urs Assia Chadly Ameena Al Sumaiti Ahmad Mayyas Department of Industrial and Systems Engineering Khalifa UniversityAbu Dhabi 127788UAE Department of Electrical Engineering and Computer Science Advanced Power and Energy CenterKhalifa UniversityAbu Dhabi 127788UAE

green-hydrogen production is vital in mitigating carbon emissions and is being adopted globally.In its transition to a more diverse energy mix with a bigger share for renewable energy,United Arab Emirates(UAE)has committed to investing billions of dollars in the production of green hydrogen.This study presents the results of the techno-economic assessment of a green-hydrogen-based commercial-building microgrid design in the UAE.The microgrid has been designed based on the building load demand,green-hydrogen production potential utilizing solar photovoltaic(PV)energy and discrete stack reversible fuel cell electricity generation during non-PV hours.Given the current market conditions and the hot humid climate of the UAE,a performance analysis is derived to evaluate the technical and economic feasibility of this microgrid.The study aims at maximizing both the building microgrid’s independence from the main grid and its renewable fraction.Simulation results indicate that the designed system is capable of meeting three-quarters of its load demand independently from the main grid and is supported by a 78%renewable-energy fraction.The economic analysis demonstrates a 3.117-$/kg levelized cost of hydrogen production and a 0.248-$/kWh levelized cost for storing hydrogen as electricity.Additionally,the levelized cost of system energy was found to be less than the current utility costs in the UAE.Sensitivity analysis shows the significant impact of the capital cost and discount rate on the levelized cost of hydrogen generation and storage.

关键词： fuel cell electrolyser green hydrogen microgrid photovoltaic

Wind energy as a source of green hydrogen production in the USA

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Clean Energy 2023年第1期7卷 8-22页

作者： Ashish Sedai Rabin Dhakal Shishir Gautam Bijaya Kumar Sedhain Biraj Singh Thapa Hanna Moussa Suhas Pol National Wind Institute Texas Tech UniversityLubbockTX 79401USA Department of Mechanical Engineering Texas Tech UniversityLubbockTX 79401USA Department of Mechanical Engineering Tribhuvan UniversityPurbanchal CampusDharanNepal green hydrogen Lab Department of Mechanical EngineeringKathmandu UniversityDhulikhelNepal Wind Energy Program Texas Tech UniversityLubbockTX 79401USA

The study incorporates an overview of the green hydrogen-production potential from wind energy in the USA,its application in power generation and the scope of substituting grey and blue hydrogen for industrial usage.Over 10 million metric tons of grey and blue hydrogen is produced in the USA annually to fulfil the industrial demand,whereas,for 1 million metric tons of hydrogen generated,13 million metric tons of CO_(2) are released into the atmosphere.The research aims to provide a state-of-the-art review of the green hydrogen technology value chain and a case study on the production of green hydrogen from an 8-MW wind turbine installed in the southern plain region of Texas.This research estimates that the wind-farm capacity of 130 gigawatt-hours is required to substitute grey and blue hydrogen for fulfilling the current US annual industrial hydrogen demand of 10 million metric tons.The study investi-gates hydrogen-storage methods and the scope of green hydrogen-based storage facilities for energy produced from a wind turbine.This research focuses on the USA’s potential to meet all its industrial and other hydrogen application requirements through green hydrogen.

关键词： green hydrogen wind energy electrolysis greenhouse gases

Forward perspective on the development and strategic pathway of green hydrogen in China

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Clean Energy 2023年第1期7卷 1-7页

作者： Guoyue Liu China Energy Investment Group Beijing100011China China hydrogen Alliance Beijing100007China

Fundamental transformations are taking place in the areas of energy structure on the supply side and on the energy-consumption side towards clean,low-carbon and safe energy.Furthermore,a new energy system is being constructed with renewable energy as its core in China with energy transition and‘carbon peak and carbon neutral’as the overall goal.China’s hydrogen-industry plan,‘Mid-to-long term hydrogen industry development plan(2021-2035)’,has an emphasis on hydrogen generation by using renewable energies as the centre piece,which points in the right direction for hydrogen’s green development.In this paper,the current status of China’s hydrogen industry is analysed;strategic needs for green hydrogen’s development and its hurdles in its paths are sorted out.Integrated demonstration at provincial levels,development of a‘great hydrogen base’and the green-hydrogen development path by gradual substitution with renewable hydrogen are proposed.Scaled-up hydrogen production,expanded consumer hydrogen usage and established hydrogen commodity exchange are recommended to safeguard its development and promote its high-quality development in China.

关键词： carbon-neutral green hydrogen renewable hydrogen 100 GW

Recent advances in thermochemical conversion of woody biomass for production of green hydrogen and CO_(2)capture:A review

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Journal of Bioresources and Bioproducts 2023年第4期8卷 319-332页

作者： Shusheng Pang Department of Chemical and Process Engineering University of CanterburyChristchurch 8041New Zealand School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo 454003China Henan Centre for Outstanding Overseas Scientists School of Chemical Engineering and EnergyZhengzhou UniversityZhengzhou 450052China

hydrogen as a clean energy carrier has attracted great interests world-wide for substitution of fossil fuels and for abatement of the climate change concerns.However,green hydrogen from renewable resources is less than 0.1%at present in the world hydrogen production and this is largely from water electrolysis which is beneficial only when renewable electricity is used.hydrogen production from diverse renewable resources is desirable.This review presents recent advances in hydrogen production from woody biomass through biomass steam gasification,producer gas processing and H_(2)/CO_(2)separation.The producer gas processing includes steam-methane reforming(SMR)and water-gas shift(WGS)reactions to convert CH_(4)and CO in the producer gas to H_(2)and CO_(2).The H_(2)storage discussed using liquid carrier through hydrogenation is also discussed.The CO_(2)capture prior to the SMR is investigated to enhance H_(2)yield in the SMR and the WGS reactions.

关键词： Woody biomass green hydrogen Thermochemical conversion CO_(2)capture Gas processing hydrogenation

Robust hybrid bismuth perovskites as potential photocatalysts for overall water splitting

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Nano Research 2024年第5期17卷 4593-4601页

作者： Antonio J.Chacón-García Herme G.Baldovi Artem A.Babaryk Antonio Rodríguez-Diéguez Sergio Navalón Yolanda Pérez Hermenegildo García Patricia Horcajada Advanced Porous Materials Unit IMDEA Energy InstituteAvda.Ramón y Cajal 328935 MóstolesMadridSpain Departamento de Química Universitat Politècnica de València46022 ValènciaSpain Departamento Química Inorgánica Universidad de Granada1807GranadaSpain Departamento de Biología y Geología Física y Química Inorgánica.ESCET.Universidad Rey Juan Carlos28933 MóstolesMadridSpain Instituto de tecnología química CSIC-UPV Universitat Politècnica de València(UPV)46022Spain

Organic-inorganic hybrid perovskites have gained great attention as promising photocatalysts for hydrogen generation.However,due to their poor stability in water,the use of aqueous hydrohalic acid solutions is specifically required for an efficient hydrogen evolution.Herein,three novel photoactive lead-free hybrid perovskites based on bismuth and triazolium cations(denoted as IEF-15,IEF-16,and IEF-17(IEF stands for IMDEA energy frameworks))were synthesized and fully characterized(structural,compositional,optical,etc.).Further,these solids were proposed as photocatalysts for the challenging gas phase overall water splitting(OWS)reaction.Accordingly,IEF-16 thin films exhibited a remarkable photocatalytic activity in both H_(2) and O_(2) evolution,as a consequence of its appropriate bandgap and energy-band alignment,achieving hydrogen evolution rates ofμmol·g_(H_(2))^(-)1846 and 360 after 24 h under ultraviolet-visible(UV-vis)irradiation or simulated solar irradiation,respectively.This study additionally highlights the remarkable structural and photochemical stability of IEF-16 under different operational conditions(i.***.water volume,irradiation and temperature),paving the way for green hydrogen production from OWS using perovskite-based photocatalysts.

关键词： bismuth-based hybrid perovskites thin films photocatalysis overall water splitting green hydrogen

Reliable off-grid power supply utilizing green hydrogen

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Clean Energy 2021年第3期5卷 441-446页

作者： Oliver Borm Stephen B.Harrison sbh4 GmbH Kranzlstraße 2182538 GeretsriedGermany

green hydrogen produced from wind,solar or hydro power is a suitable electricity storage medium.hydrogen is typically employed as mid-to long-term energy storage,whereas batteries cover short-term energy storage.green hydrogen can be produced by any available electrolyser technology[alkaline electrolysis cell(AEC),polymer electrolyte membrane(PEM),anion exchange membrane(AEM),solid oxide electrolysis cell(SOEC)]if the electrolysis is fed by renewable electricity.If the electrolysis operates under elevated pressure,the simplest way to store the gaseous hydrogen is to feed it directly into an ordinary pressure vessel without any external compression.The most efficient way to generate electricity from hydrogen is by utilizing a fuel cell.PEM fuel cells seem to be the most favourable way to do so.To increase the capacity factor of fuel cells and electrolysers,both functionalities can be integrated into one device by using the same stack.Within this article,different reversible technologies as well as their advantages and readiness levels are presented,and their potential limitations are also discussed.

关键词： green hydrogen microgrid stand-alone power system SAPS hydrogen storage electrolysis fuel cells AEC PEM AEM SOEC

Production of green hydrogen by Efficient and Economic Electrolysis of Water with Super-alloy Nanowire Type Electrocatalysts

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Semiconductor Science and Information Devices 2021年第2期3卷 29-33页

作者： Linsheng Wang Shokubai Wang Institute TokyoJapan National Institute for Materials Science TsukubaJapan The University of Electro-Communications TokyoJapan

green hydrogen production from the electrolysis of water has good application prospect due to its renewability.The applied voltage of 1.6-2.2V is required in the traditional actual water electrolysis process although the theoretical decomposition potential of electrolyzing water is 1.23V.The high overpotential in the electrode reaction results in the high energy-consuming for the water electrolysis processes.The overpotentials of the traditional Ru,Ir and Pt based electrocatalysts are respectively 0.3V,0.4V and 0.5V,furthermore use of the Pt,Ir and Ru precious metal catalysts also result in high cost of the water electrolysis process.For minimizing the overpotentials in water electrolysis,a novel super-alloy nanowire electrocatalysts have been discovered and developed for water splitting in the present paper.It is of significance that the overpotential for the water electrolysis on the super-alloy nanowire electrocatalyst is almost zero.The actual voltage required in the electrolysis process is reduced to 1.3V by using the novel electrocatalyst system with zero overpotential.The utilization of the super-alloy nanowire type electrocatalyst instead of the traditional Pt,Ir and Ru precious metal catalysts is the solution to reduce energy consumption and capital cost in water electrolysis to generate hydrogen and oxygen.

关键词： green hydrogen Zero overpotential Super-allow nanowires Electrocatalysts Electrolysis of water