Upcycling the carbon emissions from the steel industry into chemicals using three metal oxide loops

Singh, Varun; Buelens, Lukas; Poelman, Hilde; Saeys, Mark; Marin, Guy; Galvita, Vladimir

doi:10.1039/d2ya00018k

Cited by 3 publications

(1 citation statement)

References 83 publications

(138 reference statements)

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“…The difference between CCU and CCS is that CCU pays more attention to the utilization of CO2 after capture. Research and application results show that CO2 can 2 of 18 be used in the chemical, agricultural and food industries, while the iron and steel industries can provide stable and clean CO2 raw material gas, assisting in promoting the utilization path of CO2 such as steel-chemical co-production and steel-agricultural carbon sequestration [22][23][24][25][26] . Valderrama introduced the preparation of oxalic acid and glycolic acidbased polyester materials from CO2 and analyzed its application potential [27] .…”

Section: Introductionmentioning

confidence: 99%

Development and Application of Converter COMI-B Technology: A New Way of CO<sub>2</sub> Utilization

Cao¹,

Dong²,

Zhu³

et al. 2023

Preprint

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CO2 has characteristic properties and reactions at converter smelting temperature, and the chemical reaction between CO2 and elements such as C and Si in the molten pool has bubble proliferation and cooling effects, which can effectively improve the kinetic and thermodynamic conditions of converter smelting. Here, an experimental study and industrial test on the application of CO2 in converter smelting were carried out. The smelting effects of Mode-1 and Mode-2 with total CO2 injection amounts of 229 Nm3 and 196 Nm3, respectively, were compared, and the changes in molten steel and slag compositions, dust removal, and gas are analyzed. The test results show that converter top and bottom blowing CO2 technology (COMI-B)technology had significant metallurgical advantages over the N-Mode; the dephosphorization rate increased by 4.2%, slag (FeO) content was reduced by 2.04%, end point nitrogen content of molten steel was reduced by 20%, gas recovery increased by 8.29 Nm3/t, and soot production reduced by 14.7%. The results of the study provide reference for the application of COMI-B technology in converters in the iron and steel industry and develop a new path for resource utilization of CO2.

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Section: Introductionmentioning

confidence: 99%

Development and Application of Converter COMI-B Technology: A New Way of CO<sub>2</sub> Utilization

Cao¹,

Dong²,

Zhu³

et al. 2023

Preprint

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Chemical looping: a technology platform for upcycling low-grade industrial resources

et al. 2023

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Ambitions towards a circular economy are increasingly vocalised across academia, policymaking and industry. The endeavour of realising these ambitions provides major opportunities and challenges in chemical engineering, and requires a tremendous roll-out of new technologies. This perspective highlights the suitability of chemical looping as a technology platform to contribute to the valorisation of material streams that are currently not used to their full potential, termed low-grade resources. Such material streams offer significant opportunities to minimise CO2 emissions and accelerate towards a circular materials economy. Apart from defining and identifying low-grade streams, both calorific and non-calorific, a non-exhaustive overview of such streams is provided. Based on a selection of case studies focusing on steel mill gases, bauxite residue, pyrite cinder, calcium carbide slag and automotive shredder residue, it is posited that the characteristics and flexibility of the chemical looping approach offer ample possibilities to efficiently reuse low-grade streams and minimise their environmental impact. Finally, an outlook on chemical looping as a technology platform and its possible role in the drive towards circularity is given, with attention for the roles of industrial, academic and governmental stakeholders. In order to assess the suitability of a chemical looping process for valorising low-grade resources, the importance of holistic technology investigations is stressed, taking into account technical, economic, ecological and societal considerations.

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Development and Application of Converter COMI-B Technology: A New Way of CO2 Utilization

Feng

Dong

Zhu

et al. 2023

Metals

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CO2 has characteristic properties and reactions at the converter smelting temperature, and the chemical reaction between CO2 and elements such as C and Si in the molten pool has bubble proliferation and cooling effects, which can effectively improve the kinetic and thermodynamic conditions of converter smelting. Here, an experimental study and industrial test on the application of CO2 in converter smelting were carried out. The smelting effects of Mode-1 and Mode-2 with total CO2 injection amounts of 229 Nm3 and 196 Nm3, respectively, were compared, and the changes in molten steel and slag compositions, dust removal, and gas were analyzed. The test results show that converter top and bottom blowing CO2 technology (COMI-B) technology had significant metallurgical advantages over the N-Mode; the dephosphorization rate increased by 4.2%, slag (FeO) content was reduced by 2.04%, end point nitrogen content of molten steel was reduced by 20%, gas recovery increased by 8.29 Nm3/t, and soot production was reduced by 14.7%. The results of the study provide a reference for the application of COMI-B technology in converters in the iron and steel industry and develop a new path for resource utilization of CO2.

show abstract

Upcycling the carbon emissions from the steel industry into chemicals using three metal oxide loops

Abstract: The iron and steel industry is a carbon-intensive industry and one of the largest industrial sources of CO2 emissions. In this work, we show how the steel mill gases can...

Cited by 3 publications

References 83 publications

Development and Application of Converter COMI-B Technology: A New Way of CO<sub>2</sub> Utilization

Development and Application of Converter COMI-B Technology: A New Way of CO<sub>2</sub> Utilization

Chemical looping: a technology platform for upcycling low-grade industrial resources

Development and Application of Converter COMI-B Technology: A New Way of CO2 Utilization

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