5 ms·

What about electrolysis?

shagie 4y ago
The question is "what is the most efficient way of getting hydrogen at the source?" Shipping it directly has problems with hydrogen being such a small gas and it is damaging to the vessel that it is transported in ( https://en.wikipedia.org/wiki/Hydrogen_embrittlement https://en.wikipedia.org/wiki/Hydrogen_embrittlement ). Pushing electricity to the source needs a lot of power to work on the scale of steel production. Generating electricity from further away means power loss. Pumping water from the ground for hydrogen gives you ground water depletion (a serious issue in many parts of the world). Ammonia is already a well understood compound for shipping. It doesn't pose the losses of shipping hydrogen and is already something needed in various places (fertilizer production). Note that part of this is indeed doing electrolysis - at the location the ammonia is made rather than at the steel foundry. ( https://en.wikipedia.org/wiki/Ammonia_production#Haber-Bosch_process https://en.wikipedia.org/wiki/Ammonia_production#Haber-Bosch... ) In https://onlinelibrary.wiley.com/cms/asset/2299bce2-54a9-43ce-983b-055155b4522b/advs5497-fig-0001-m.jpg https://onlinelibrary.wiley.com/cms/asset/2299bce2-54a9-43ce... you will note that the cost of hydrogen production is the same - but the other costs of conversion and import / export terminals is much more.
- cyberax 4y ago
  > The question is "what is the most efficient way of getting hydrogen at the source?" Who said anything about hydrogen? You can directly reduce iron electrolytically: https://www.siderwin-spire.eu/ https://www.siderwin-spire.eu/
  - iamerroragent 4y ago
    From article: " Important examples are hydrogen-based direction reduction (HyDR),[4] hydrogen plasma smelting reduction,[5] and various electrolysis processes (e.g., molten oxides’ electrolysis,[6] molten salt electrolysis,[7] waster-assisted molten salt electrochemical reduction,[8] and electrowinning of solid iron from aqueous solutions[9]). Among these alternatives, the HyDR approach has today reached the highest technology readiness level (TRL 6–8) and is currently being deployed at industrial scale.[2, 10] In this process, green hydrogen should be ideally used, i.e., hydrogen that has been produced using renewable energy sources, generating water instead of carbon dioxide as redox product.[4] " This article is trying to make HyDR more green since it's already deployed more at an industrial level compared to alternatives at the moment.

The question is "what is the most efficient way of getting hydrogen at the source?" Shipping it directly has problems with hydrogen being such a small gas and it is damaging to the vessel that it is transported in ( https://en.wikipedia.org/wiki/Hydrogen_embrittlement https://en.wikipedia.org/wiki/Hydrogen_embrittlement ). Pushing electricity to the source needs a lot of power to work on the scale of steel production. Generating electricity from further away means power loss. Pumping water from the ground for hydrogen gives you ground water depletion (a serious issue in many parts of the world). Ammonia is already a well understood compound for shipping. It doesn't pose the losses of shipping hydrogen and is already something needed in various places (fertilizer production). Note that part of this is indeed doing electrolysis - at the location the ammonia is made rather than at the steel foundry. ( https://en.wikipedia.org/wiki/Ammonia_production#Haber-Bosch_process https://en.wikipedia.org/wiki/Ammonia_production#Haber-Bosch... ) In https://onlinelibrary.wiley.com/cms/asset/2299bce2-54a9-43ce-983b-055155b4522b/advs5497-fig-0001-m.jpg https://onlinelibrary.wiley.com/cms/asset/2299bce2-54a9-43ce... you will note that the cost of hydrogen production is the same - but the other costs of conversion and import / export terminals is much more.

cyberax 4y ago
> The question is "what is the most efficient way of getting hydrogen at the source?" Who said anything about hydrogen? You can directly reduce iron electrolytically: https://www.siderwin-spire.eu/ https://www.siderwin-spire.eu/
- iamerroragent 4y ago
  From article: " Important examples are hydrogen-based direction reduction (HyDR),[4] hydrogen plasma smelting reduction,[5] and various electrolysis processes (e.g., molten oxides’ electrolysis,[6] molten salt electrolysis,[7] waster-assisted molten salt electrochemical reduction,[8] and electrowinning of solid iron from aqueous solutions[9]). Among these alternatives, the HyDR approach has today reached the highest technology readiness level (TRL 6–8) and is currently being deployed at industrial scale.[2, 10] In this process, green hydrogen should be ideally used, i.e., hydrogen that has been produced using renewable energy sources, generating water instead of carbon dioxide as redox product.[4] " This article is trying to make HyDR more green since it's already deployed more at an industrial level compared to alternatives at the moment.