Region: United States

Minus Materials

Boulder, CO, USA

Using algae to generate carbon negative limestone for cement!

With this breakthrough demonstration project Minus Materials will install and operate a first-of-its-kind “regenerative quarry” pilot project in Boulder County that will support the production of carbon-negative biorenewable limestone using microalgae. Limestone produced can be used as a substitute for conventional emissions intensive ‘clinker’, the base component of Portland cement.
Country: United States
Status: In Development
Type: Materials Mineralization
Links
www.minusmaterials.com

CarbonBuilt

Childersburg, Alabama, USA

World’s first ultra-low carbon concrete mineralizes atmospheric carbon

CarbonBuilt produces the world’s first ultra-low carbon concrete blocks. The new blocks reduce embodied carbon by 70-100+% through cement replacement and by mineralizing atmospheric CO2. They cost no more to produce than traditional concrete. More plants are in development.
Country: United States
Status: Operational
Type: Materials Mineralization
Links
https://carbonbuilt.com/

Carbon Reform

Philadelphia, Pennsylvania, USA

Modular direct air capture, energy savings, and improved indoor air quality for buildings

Country: United States
Status: Operational
Type: Direct Air Capture
Links
https://carbonreform.com/

Epiphyte

University of Pennsylvania, Philadelphia, PA, USA

Open source direct air capture machines

Country: United States
Status: In Development
Type: Direct Air Capture
Links
https://carboncrowd.cc/

Nori

Washington, USA

Regenerate the earth

Country: United States
Status: Operational
Type: Organic Soil Carbon
Links
https://nori.com/

Eion

Mississippi, USA

works with American heartland communities to safely and permanently remove CO2.

Country: United States
Status: Operational
Type: Enhanced Rock Weathering
Links
https://eioncarbon.com/

Graphyte

Memphis, Tennessee, USA

Encases biomass preventing decomposition.

Combining photosynthesis with practical engineering, Graphyte’s Carbon Casting technology provides an immediate pathway for billions of tons of low-cost, permanent carbon removal. With levelized production costs at under $100/ton with minimal energy requirements, we can remove CO2 for 1,000+ years.
Country: United States
Status: Operational
Type: Biomass Burial
Links
https://graphyte.com/

Vaulted Deep

Hutchinson, Kansas, USA

Buries sludgy organic waste.

Vaulted Deep injects organic waste into durable wells, where the carbon in the waste is sequestered as it decomposes. Using a specialized slurry injection technology, their process can handle a wide range of organic carbon sources with minimal energy and upfront processing. Their system has the potential to be deployed quickly at large scales.
Country: United States
Status: In Development
Type: Biomass Burial
Links
https://vaulteddeep.com/

Banyu Carbon

CoMotion Labs at Fluke Hall, University of Washington

Uses sunlight to degas seawater

Banyu uses sunlight to capture CO₂ from seawater. A reusable, light-activated molecule that becomes acidic when exposed to light causes carbon dissolved in seawater to degas as CO₂, which is then stored permanently. Because only a small portion of the visible light spectrum is needed to trigger the reaction, this is a highly energy-efficient approach to direct ocean removal.
Country: United States
Status: Concept
Type: Direct Ocean Capture
Links
https://www.banyucarbon.com

Vycarb

New York City, NY, United States

Removes carbon dioxide from water. 

Vycarb’s fully-measured carbon management system performs real-time, autonomous removal, storage, and verification of CO2 in water. With multiple pilots deployed on the US east coast, Vycarb’s modular, autonomous system uses a real-time measurement technology and accelerated alkalinity dissolution to optimize CO2 removal to water’s naturally-changing chemical conditions. Designed for deployment across any high-CO2 waters, Vycarb’s system creates the first fully-measured, ecologically beneficial carbon removal and storage that can be distributed around the world.
Country: United States
Status: Concept
Type: Ocean Alkalinity Enhancement
Links
https://www.vy-carb.com/