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VERSION:2.0
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 1
SUMMARY:Techno-economic assessment of SEWGS integration in steel plants for CO2 mitigation
DESCRIPTION:The iron and steel industry is one of the most carbon and energy intensive industrial sectors and efforts have to be made to reduce its carbon footprint [1].

In this work the techno-economic assessment of four different plant configurations is carried out:
	Midrex + EAF plant
	Midrex + EAF plant with integration of SEWGS
	Industrial symbiosis between BF-BOF plant and Midrex + EAF plant
	Midrex + Open slag bath furnace + BOF

The first plant considered is a conventional DR-EAF plant. Natural gas is used as feedstock for the synthesis of the reducing gases. Some natural gas is also directly added to the shaft furnace. The DRI from the shaft furnace is then sent to an EAF to produce steel. The main direct emissions points are the flue gas of the reformer and the direct emissions of the EAF.

The above described process can be decarbonised adopting the SEWGS technology. This technology allows to produce a hydrogen rich stream from the top-gas and use it as fuel in the reformer.

In the third considered plant scheme, the industrial symbiosis between a BF-BOF plant and a DRI-EAF plant is analysed. The core of this process is the SEWGS technology that allows to produce an H2/N2 stream using the blast furnace gas (BFG) and the basic oxygen furnace gas (BOFG) as feedstock. The H2/N2 stream is in part used as fuel in the reformer and in part recycled back to the integrated steel mill.

The last case considers the adoption of an open slag bath furnace and a basic oxygen furnace downstream the DR process.

The cases have been modelled and simulated in Aspen Plus, using available plant data in literature. Environmental and economic KPIs are used for the assesment: energy consumption, specific emissions, carbon capture rate, carbon avoidance and SPECCA indicator.

 
CLASS:PUBLIC
DTSTART:20230614T153000
DTEND:20230614T155000
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