Abstract
Iron and steel production is responsible for 5 - 6% of
the global anthropogenic CO2 emissions. Recent greenhouse
gas reduction targets may put this industry sector at a
risk of severe carbon leakage. There are three main ways
to reduce emission levels from currently highly efficient
European iron and steel mills: -Implement novel, energy
efficient processes, -Carbon Capture and Storage,
-Utilization of carbon neutral reducing agents.
Replacing part of the expensive coal as reducing agent in
the blast furnace by pulverized coal injection (PCI) has
the potential to increase the calorific value of the
blast furnace top gas. Instead of combusting the top gas
in a gas boiler, this higher calorific value top gas can
be applied in a high-efficiency combined power cycle
(GTCC) for low-BTU fuels. The mass and energy balances
for the processes were established in Aspen Plusr. Two
CO2 capture processes were compared; conventional MEA and
Selexol.
CONCLUSIONS: -Application of BF Plus concept enables
significant reduction of site CO2 emissions (up to 1.8 Mt
CO2/a), -Replacing the conventional gas boiler with a
high-efficiency low-BTU gas turbine combined cycle more
than doubles the fuel efficiency of the blast furnace top
gas.
Staged implementation enables minimised investment and
technology risk when targeting higher performance and
lower emissions.
Original language | English |
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Publication status | Published - 2015 |
Event | 8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8 - Trondheim, Norway Duration: 16 Jun 2015 → 18 Jun 2015 |
Conference
Conference | 8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8 |
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Abbreviated title | TCCS-8 |
Country/Territory | Norway |
City | Trondheim |
Period | 16/06/15 → 18/06/15 |
Keywords
- CO2 capture
- iron and steel
- MEA
- slectol
- low-BTU gas turbine
- PCI