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CAMPHRE

CO2 capture and mineralisation using a Centrifugal Hybrid Process
Funder: French National Research Agency (ANR)Project code: ANR-24-CE51-6092
Funder Contribution: 414,275 EUR
Description

To deal with the critical increase in CO2 emissions into the atmosphere, the capture and storage of CO2 from industrial effluents is an essential decarbonisation strategy. For capture, gas/liquid absorption columns have proved their worth. However, because of the large quantities to be treated, leading to large-scale equipment, high energy costs due to solvent regeneration, and their lack of operational flexibility in on-board processes, their deployment is being held back. The CAMPHRE project proposes to address this environmental issue by designing an innovative intensified process for CO2 capture, mineralisation and solvent regeneration. The process involves the use of two centrifugal technologies (HiGee), the Rotating Packing Bed (RPB) and the Spinning Disk Reactor (SDR), combined in a one single rotating unit. The principle is to use centrifugal force to accelerate the transfer phenomena in order to obtain more compact processes. The RPB has proved its worth for the absorption of CO2 by various solvents. SDRs are particularly interesting for precipitation reactions thanks to the extreme mixing generated. The originality of the project involves combining these two operations in a single hybrid rotating process to minimise the energy cost of the operation. The aim is to produce and model a multi-stage prototype in which an RPB will be positioned at the top to capture CO2 using an amine solution, followed below by the SDR to precipitate the absorbed CO2 in the form of CaCO3 using Ca(OH)2. The major challenges of this process will be to ensure the homogeneous distribution of phases in the rotating elements, to control the flows between the two operations, and to understand the coupled phenomena so that they can be modelled and to propose an extrapolation of the process to a larger scale.

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