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Chemical looping combustion (coal)


Technology Description

Chemical looping is a technology that involves CO2 capture at high temperatures using two main reactors. Chemical looping systems use small particles of metal (e.g. iron, manganese) to bind oxygen from the air to form a metal oxide (1st reactor), which is then transported to the other reactor where it releases the oxygen for the combustion of the fuel, thus generating energy and a concentrated stream of CO2 (2nd reactor). The metal is then looped back to the first reactor. A main benefit of solid looping is the potentially lower overall process energy consumption. Challenges include reducing the cost and degradation of the metal carrier (IEAGHG, 2019).

Relevance for Net Zero

Being at an early development stage, there are uncertainties on future costs.

Key Countries

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