Stephen Harrison from sbh4 Consulting analyses the key role oxygen and ASUs are playing in tackling emissions in heavy industry
Scope 3 emissions take place in the supply chain to an iron or steel making facility. They are not directly emitted from the iron or steel making plant (scope 1) and neither do they account for emissions from power generation for the plant (scope 2). Production of green steel will require reduction in all categories of greenhouse gas emissions.
One contributor to scope 3 emissions is over-the-fence oxygen supply for basic oxygen furnaces and reheating burners. Oxygen is produced on power-hungry air separation units.
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