Making Green Steel with Hydrogen Released from Ammonia

[@rockets4kids]

This sounds like a great way to shift the production of greenhouse gasses from the steel sector to the ammonia sector.

[@firefox39693]

Could you go into detail about the price per kWh needed to produce green hydrogen and also green ammonia needed to produce green steel at roughly the same price as existing steel?

[@SeekingBeautifulDesign]

If you had a large source of pure FeCO3 (siderite), would this be any more useful in the H2/electric plasma process? Siderite seems less useful for the traditional process.

[@antoniomalynowskyj183]

Se toda produção migrar do BOF LD para o FEA, como fica a disponibilidade de energia elétrica e custo para produzir 2,4 bilhões de toneladas de aço líquido? Energia solar e eólica são suficientes?

[@alexv.854]

Best video about green steel I have seen so far. Thank you very much 🫶

[@geoffgeoff143]

Using hydrogen to reduce wouldnt be an a new discovery. Why hasn't it been look at seriously untill now? CSIRO developed a filter to seperate hydrogen and nitrogen from ammonia. Ammonia is mostly made from methane from natural gas.

[@chrisking7603]

Long distance transport is unfortunately a factor of how cheap shipping is nowadays. Now economics driving everything, if one could make green ammonia cheaper than grotty old bunker oil then ships could be efficiently powered by electric motors driven by NH3-fuelled turbines. Another win!

[@EastBayFlipper]

This is very interesting 🤔 I was concerned about excess nitrogen being converted to NOx compounds in the stack or salting the iron produced😃👍 The converter for the iron ore would be feeding pulverized iron ore into a reactor with ammonia to extract iron powder with entrained nitrogen. Now, if some of that powdered iron was diverted then it could be used as fuel for the reaction process where the byproducts would be[ Fe + ◇ = Fe2O3 ] So, the nitrogen could be captured and sold The iron ore provides the raw material and the fuel to power the reaction and if you want to :show off", create a cogeneration facility in the steel plant to power the arc furnace with the same iron powder that is melted in the furnace. This is an environmentalist's fantasy come true 😂🤣👍

[@MrErikb81]

But the ammonia is made from... wait for it: hydrogen. And that is mostly created from methane, producing CO. So unless you can do it with green hydrogen, it's not so green. Might as well produce green hydrogen directly on the spot and skip the whole step of converting it to ammonia (this uses energy too!) and transporting it.

[@nfrl-hs2ly]

Devil's advocate here, would that starve the world's supply of ammonia for fertilizer? Also what is the comparative cost of the ammonia cycle versus the original process? Is it cost competitive? Or would vast subsidies be required to get steel producers to switch over?

[@wilfriedschuler3796]

The difference in transport volume is not so important. But the price to get there is very high. It is the Haber Bosch process. One need 10 KWh/kg to produce ammonia. Only a complete fool will do such things. To free the hydrogen later, the ammonia has to undergo an endothermic cracking process + purification of the hydrogen. Quite costly and wasteful. Just foolish.