What question did this study set out to answer?

This study aims to explore the carbon capture potential of certain metals, particularly iron, in a CO2 atmosphere.

April 27, 2026Open Access

Carbon Capture Potential via Metal Combustion in Carbon Dioxide

Key Points

This study aims to explore the carbon capture potential of certain metals, particularly iron, in a CO2 atmosphere.
Iron was combusted in a CO2 atmosphere under controlled conditions.
The formation of products, including CO and black solid elemental carbon, was analyzed.
Iron combusted in a CO2 atmosphere resulted in the formation of CO and elemental carbon.
The reaction demonstrates a new way to capture carbon while releasing thermal energy.

Abstract

The increasing concentration of atmospheric CO2 is a major driver of global warming and climate change, making its reduction an urgent challenge. Certain metals can combust in a CO2 atmosphere and, under appropriate conditions, generate elemental carbon, thereby enabling carbon fixation while simultaneously releasing thermal energy. This characteristic highlights their potential applicability to CCUS technologies. In this study, iron was selected as a candidate owing to its relatively low life-cycle CO2 emissions. When heated in a CO2 atmosphere, the formation of CO and black solid products were observed. These findings indicate that iron reacts with CO2, demonstrating the potential for carbon capture via metal–CO2 reactions.

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