An efficient process for sustainable and scalable hydrogen production from green ammonia

Cha, Junyoung; Park, Yongha; Brigljević, Boris; Lee, Boreum; Lim, Dongjun; Lee, Tae‐Ho; Jeong, Hyangsoo; Kim, Yongmin; Sohn, Hyuntae; Mikulčić, Hrvoje; Lee, Kyung Moon; Nam, Dong; Lee, Ki Bong; Yoon, Chang Won; Jo, Young Suk

doi:10.1016/j.rser.2021.111562

Cited by 59 publications

(10 citation statements)

References 64 publications

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“…While the thermodynamics are not as favourable as that of formic acid, there are conditions above 350 °C that push the equilibrium to >98% conversion. 26 The only industrially relevant way to produce green ammonia currently is by coupling renewably sourced water electrolysis to the standard HB process, however, electrochemical N 2 reduction R&D is advancing rapidly and could be the future of green ammonia production. The 2019 study by Gomez and co-workers compares the economics and sustainability of both; they found that electrochemical N 2 reduction in the presence of hydrogen provided the lowest levelised cost of ammonia.…”

Section: Methodsmentioning

confidence: 99%

Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H₂ supply chain

Alfonso Vargas,

Kim,

Alfonso Vargas

et al. 2024

Energy Environ. Sci.

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Section: Methodsmentioning

confidence: 99%

Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H₂ supply chain

Alfonso Vargas,

Kim,

Alfonso Vargas

et al. 2024

Energy Environ. Sci.

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“…This process achieved a superior CO 2 reduction rate, ranging from 78 to 95% in terms of kilograms of CO 2 per kilogram of H 2 produced when compared to alternative methods, such as biomass gasification and steam methane reforming. 218 Numerous investigations have been carried out concerning technical aspects, process simulation, mathematical modeling, and feasibility assessments regarding the production of hydrogen from organic compounds. Over time, as technology advances and economies of scale are realized, the cost of hydrogen production from these feedstocks is expected to become more competitive with traditional methods.…”

Section: Techno-economic Analysis Of Various Catalytic Hydrogen Produ...mentioning

confidence: 99%

Review and Outlook of Hydrogen Production through Catalytic Processes

Kumar,

Singh,

Dutta

2024

Energy Fuels

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Hydrogen holds immense potential as a sustainable energy source as a result of its eco-friendliness and high energy density. Thus, hydrogen can solve the energy and environmental challenges. However, it is crucial to produce hydrogen using sustainable approaches in a cost-efficient manner. Currently, hydrogen can be produced by utilizing diverse feedstocks, such as natural gas, methane, ammonia, smaller organic molecules (methanol, ethanol, glycerol, and formic acid), biomass, and water. These feedstocks undergo conversion into hydrogen through different catalytic processes, including steam reforming, pyrolysis, catalytic decomposition, gasification, electrolysis, and photoassisted methods (photoelectrochemical, photocatalysis, and biophotolysis). Researchers have extensively explored various catalysts, including metals, alloys, oxides, non-oxides, carbon-based materials, and metal−organic frameworks, for these catalytic methods. The primary objectives have been to attain higher activity, selectivity, stability, and cost effectiveness in hydrogen generation. The efficacy of these catalytic processes is significantly dependent upon the performance of the catalysts, emphasizing the need for further research and development to create more efficient catalysts. However, during catalytic hydrogen production, gases like CO 2 , O 2 , CO, N 2 , etc. are produced alongside hydrogen. Separation techniques, such as pressure swing adsorption, metal hydride separation, and membrane separation, are employed to obtain high-purity hydrogen. Furthermore, a techno-economic analysis indicates that catalytic hydrogen production through steam reforming of natural gas/methane is currently viable and commercially successful. Photovoltaic electrolysis has been commercialized, but the cost of hydrogen production is still higher. Meanwhile, other photoassisted methods are in the development phase and hold the potential for future commercialization.

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“…14,15 Of these different catalysts, Ru-based catalysts showed the highest catalytic activity as Ru has a suitable nitrogen binding energy of ∼142 kcal•mol −116,17 based on the theoretical calculations. 4,18 Choudhary et al 19 studied different metallic catalysts and found that Ru/SiO 2 had the best performance followed by Ir/SiO 2 and Ni/SiO 2 . In specific, a NH 3 conversion of 97% was achieved for Ru/SiO 2 at 600 °C, indicating that lower temperature decomposition of NH 3 is possible, with Ru as the active component having the greatest potential.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Hydrogen can be generated from ammonia decomposition without CO x emitted, which meets the fuel requirement for proton exchange membrane fuel cells (PEMFCs). − On the other hand, ammonia has a high hydrogen storage capacity with a weight energy density 17.6 wt % and bulk energy density 108 g H 2 /L NH 3 (at 20 °C), respectively. , In addition, there are ready infrastructures for the storage and transportation of ammonia, which greatly alleviates the hardships associated with hydrogen storage and transportation. − Therefore, ammonia is now considered as a promising and efficient hydrogen carrier. − …”

Section: Introductionmentioning

confidence: 99%

Promotion of Low-Temperature Catalytic Activity of Ru-Based Catalysts for Ammonia Decomposition via Lanthanum and Cesium Codoping

Wang,

Luo,

Wang

et al. 2024

ACS Sustainable Chem. Eng.

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were synthesized via the wet impregnation method, which were then used for hydrogen production from ammonia decomposition. Of the catalysts prepared, RuLaCs/Al 2 O 3 exhibited the highest lowtemperature catalytic activity and greatest stability, achieving a NH 3 conversion of >99% at the temperature as low as 450 °C. It was discovered that the addition of La and Cs was able to promote the recombinative desorption of surface nitrogen atoms at active sites through the role of electron donor, thus promoting ammonia decomposition. The synergistic effect of La and Cs was thought to be the reason for significantly enhancing the catalytic performance of the catalyst. The continuous tests of more than 100 h indicated no activity deterioration for the developed catalysts, demonstrating an excellent stability and great potential for future commercial applications.

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An efficient process for sustainable and scalable hydrogen production from green ammonia

Cited by 59 publications

References 64 publications

Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H₂ supply chain

Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H₂ supply chain

Review and Outlook of Hydrogen Production through Catalytic Processes

Promotion of Low-Temperature Catalytic Activity of Ru-Based Catalysts for Ammonia Decomposition via Lanthanum and Cesium Codoping

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An efficient process for sustainable and scalable hydrogen production from green ammonia

Cited by 59 publications

References 64 publications

Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H2 supply chain

Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H2 supply chain

Review and Outlook of Hydrogen Production through Catalytic Processes

Promotion of Low-Temperature Catalytic Activity of Ru-Based Catalysts for Ammonia Decomposition via Lanthanum and Cesium Codoping

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Product

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Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H₂ supply chain

Nurturing the blossoming hydrogen economy using HBAT: modelling every link in the H₂ supply chain