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A comment on Reducing Iron Oxide with Ammonia: A Sustainable Path to Green Steel.

Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by boshomi on Sunday April 02, 2023 @04:41PM (#35414958)
Reduction of iron ore with carbon monoxid in closed loop:

• Decarbonisation of BF-BOF through thermochemical closed carbon looping.

• Demonstration of mass and energy flows of thermochemical BF-BOF system.

• 88% emissions reduction of UK steel industry through £720 million investment.

• Decarbonisation without retiring of existing BF-BOF, reducing stranded assets.

• After 5 years, £1.28 billion savings and total UK-wide emissions reduction of 2.9%.

“if the thermochemical closed reactors were exclusively powered by electricity, it would require 607 kWh/t liquid steel.”

»Cost effective decarbonisation of blast furnace – basic oxygen furnace steel production through thermochemical sector coupling« -- https://doi.org/10.1016/j.jclepro.2023.135963

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Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by TheSpiceIsLife on Sunday April 02, 2023 @08:40PM (#35417083)
The UK steel industry is 0.1% of the UK economy, at around 7 million tonnes per annum.

China producuces a little over 1 billion metric tonnes per annum

By what measure is this not futile?

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Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by lmm on Sunday April 02, 2023 @08:50PM (#35417149)
So the UK, with about 4.7% the population of China, produces 0.7% as much steel, i.e. the ratios are within an order of magnitude. And presumably what works in the UK will work in China too.
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Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by peterashford on Sunday April 02, 2023 @08:52PM (#35417176)
Almost every individual action by a single emitter makes a tiny contribution to AGW.
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Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by lazide on Sunday April 02, 2023 @09:47PM (#35417574)
If the technology is developed and proven in a smaller economy, then it can be expanded to the bigger one by said smaller economy.
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Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by justinclift on Monday April 03, 2023 @04:44AM (#35420404)
Doesn't China have a free pass with their emissions through to 2030, due to their "developing country" status?

Pretty sure that's the case, though they have to start reducing their emissions after that like the rest of us.

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Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by scythe on Monday April 03, 2023 @12:38AM (#35418619)
>In conclusion, this paper aims to demonstrate the first principal calculations of coupling a thermochemical carbon dioxide splitting cycle with a steel production facility for cost-effective steel decarbonisation.

It's an interesting idea. But let's be clear: it's an idea. The scientific literature contains a lot of good ideas.

By contrast the OP paper is actually an experimental demonstration of reduction with ammonia. A bird in the hand is worth two in the bush.

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Re:Reducing Iron Oxide with Ammonia: A Sustainable Path to G... by Moru on Monday April 03, 2023 @02:15AM (#35419186)
Swedish projects to create green steel [1] seems to have delivered the first customer batch of steel. They use hydrogen produced locally.

[1] https://www.reuters.com/business/sustainable-business/sweden...

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