Preliminary Techno-Economic Evaluation of Blast Furnace Gas Utilisation with Ca-Cu looping Cycle Integrated with CO2 Separation by Partial Condensation

10 Pages Posted: 18 Nov 2022

See all articles by Navid Khallaghi

Navid Khallaghi

Department of Chemical Engineering and Analytical Science, The University of Manchester

Shahan Ahmed

The University of Manchester - Department of Chemical Engineering and Analytical Science

Maryam Malekshahian

The University of Manchester - Department of Chemical Engineering and Analytical Science

Vincenzo Spallina

The University of Manchester

Date Written: August 19, 2022

Abstract

The iron and steel (I&S) industry, an energy-intensive sector and one of the significant contributors to global CO2 emissions accounted for approximately 2.6 Gt of direct CO2 emissions in 2019. BFG has a higher ratio of CO and CO2 compared to other I&S off-gases (coke oven gas and basic oxygen furnace gas). On the other hand, BFG has lower LHV than the other two off-gases due to higher N2 and CO2 concentrations. Therefore, effective CO2 removal from BFG is more cost-effective than other off-gases due to the higher CO2 content in the BFG. Hence, BFG decarbonisation with novel cyclic technology, the Ca-Cu looping, is considered in this research and is integrated with a cryogenic CO2 separation unit. Aspen Plus® is utilised to develop the process modelling and performance evaluation. Techno-economic results revealed that an overall energy efficiency of 75.9% is achievable. The high cost of the plant (456.4 M€) is dictated by the high capital cost of the CASOH reactors (256.5 M€). Finally, considering 48.3 M€/y revenue from heat recovery and hydrogen-enriched syngas production, the total annualised cost of the plant is 118.1 M€ resulting in the cost of CO2 capture of 66.5 €/tCO2).

Keywords: pre-combustion, Ca-Cu looping, decarbonisation, steel industry

Suggested Citation

Khallaghi, Navid and Ahmed, Shahan and Malekshahian, Maryam and Spallina, Vincenzo, Preliminary Techno-Economic Evaluation of Blast Furnace Gas Utilisation with Ca-Cu looping Cycle Integrated with CO2 Separation by Partial Condensation (August 19, 2022). Proceedings of the 16th Greenhouse Gas Control Technologies Conference (GHGT-16) 23-24 Oct 2022, Available at SSRN: https://ssrn.com/abstract=4280447 or http://dx.doi.org/10.2139/ssrn.4280447

Navid Khallaghi (Contact Author)

Department of Chemical Engineering and Analytical Science, The University of Manchester ( email )

United Kingdom

Shahan Ahmed

The University of Manchester - Department of Chemical Engineering and Analytical Science ( email )

Oxford Rd
Manchester, M13 9PL
United Kingdom

Maryam Malekshahian

The University of Manchester - Department of Chemical Engineering and Analytical Science ( email )

Oxford Rd
Manchester, M13 9PL
United Kingdom

Vincenzo Spallina

The University of Manchester ( email )

Booth St West
Manchester, N/A M15 6PB
United Kingdom

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