Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions

Kristin Onarheim, Antti Arasto

Research output: Contribution to conferenceConference AbstractScientific

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 languageEnglish
Publication statusPublished - 2015
Event8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8 - Trondheim, Norway
Duration: 16 Jun 201518 Jun 2015

Conference

Conference8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8
Abbreviated titleTCCS-8
CountryNorway
CityTrondheim
Period16/06/1518/06/15

Fingerprint

Iron and steel plants
Blast furnaces
Gases
Calorific value
Reducing agents
Boilers
Coal
Iron
Carbon capture
Carbon
Energy balance
Greenhouse gases
Gas turbines
Steel
Industry

Keywords

  • CO2 capture
  • iron and steel
  • MEA
  • slectol
  • low-BTU gas turbine
  • PCI

Cite this

Onarheim, K., & Arasto, A. (2015). Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions. Abstract from 8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8, Trondheim, Norway.
Onarheim, Kristin ; Arasto, Antti. / Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions. Abstract from 8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8, Trondheim, Norway.
@conference{48eec4ad95ef4b7e9c1685fcae173d36,
title = "Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions",
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.",
keywords = "CO2 capture, iron and steel, MEA, slectol, low-BTU gas turbine, PCI",
author = "Kristin Onarheim and Antti Arasto",
year = "2015",
language = "English",
note = "8th Trondheim Conference on CO<sub>2</sub> Capture, Transport and Storage, TCCS-8, TCCS-8 ; Conference date: 16-06-2015 Through 18-06-2015",

}

Onarheim, K & Arasto, A 2015, 'Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions' 8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8, Trondheim, Norway, 16/06/15 - 18/06/15, .

Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions. / Onarheim, Kristin; Arasto, Antti.

2015. Abstract from 8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8, Trondheim, Norway.

Research output: Contribution to conferenceConference AbstractScientific

TY - CONF

T1 - Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions

AU - Onarheim, Kristin

AU - Arasto, Antti

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - CO2 capture

KW - iron and steel

KW - MEA

KW - slectol

KW - low-BTU gas turbine

KW - PCI

M3 - Conference Abstract

ER -

Onarheim K, Arasto A. Staged implementation of alternative processes for an integrated steel mill to improve performance and reduce CO2 emissions. 2015. Abstract from 8th Trondheim Conference on CO2 Capture, Transport and Storage, TCCS-8, Trondheim, Norway.