SKYRENU

XPRIZE TRACK
AIR

CDR PATHWAY(S)
Air - Solid sorbent direct air capture
Rocks - Mineralization of mine or industrial waste

PHYSICAL PRODUCTS
Industrial Gases/Pure CO2
Magnesium Carbonate

FOUNDED
2021

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Skyrenu Technologies Inc.
Sherbrooke, Canada
skyrenu.com

Martin Brouillette
[email protected]

COMPANY DESCRIPTION

We combine a direct-air capture (DAC) system with a rock carbonation process to treat mine tailings in order to lock away carbon forever. Our system is installed at an abandoned mine site in the province of Quebec in Canada, where 800 MtCO2 of existing mine tailings offer a CO2 sequestration potential of about 200 MtCO2; the process is powered by the 100% renewable Hydro-Quebec grid.

CORE INNOVATION

We use proprietary (patent pending) solid sorbent DAC and waste mineralization processes. Moreover, both processes are tightly integrated such that waste heat from the DAC is exploited by the mineralization process, leading to a highly energy-efficient overall process. Our system can be directly installed at mine waste sites, thereby eliminating the need to transport CO2 or mineral feedstock over long distances.

CO2 CAPTURE

Our DAC device uses a proprietary continuous adsorption/regeneration process with moving bed monolith solid sorbent reactors, in a highly energy-efficient process. See Worldwide Patent Application WO2021258219A1.

CO2 SEQUESTRATION

We use a proprietary low-temperature process where magnesium present in mine tailings reacts with dissolved CO2 in an aqueous solution to form stable solid magnesium carbonate compounds. This operation also decontaminates the treated materials, as no hazardous asbestos residues remain after the process is complete. IP yet to be filed

CO-BENEFITS OR PRODUCTS

An important added co-benefit in the treatment of  mine tailings is the remediation of the hazardous nature of the mining sites.