BLUE PLANET AGGREGATES
Company:
Blue Planet Systems
Website:
https://www.blueplanetsystems.com/
Location:
Pittsburg, California
Products:
Coarse aggregate
Fine aggregate
Technology:
Combines a calcium source from a range of options including demolished concrete, cement kiln dust, steel slag, fly ash, air pollution control fly ash, bauxite residue, silicate rocks, with CO2 to create a synthetic limestone aggregate. This aggregate sequesters CO2 permanently. Sources of the CO2 used include flue gases from cement, iron, steel, power generation and refineries, direct air capture, and hydrogen production.
Benefits:
Coarse aggregate sequesters 600 lbCO2/CY (90 kgC02/Mt). Fine aggregate sequesters 520 lbCO2/CY (78 kgCO2/Mt).
Possible disadvantages:
Relies on industries with CO2 emissions for a source of CO2. Competing with other industries for use of fly ash, steel slag, and other calcium feedstock. Manufacturing plants need to be dispersed for wide adoption. Some support from oil industry.
Status:
The concept for Blue Planet was started in 2012. Progress appears to be increasing with the plans for a new plant with Calpine, a power provider.
TRL estimated at 8.
Production:
Current expansion (2025) to 11,000 Mt of aggregate. Working with Calpine to build a plant with capacity of 500,000 Mt, sufficient for 250,000 CY of concrete, 1% of annual U.S. production (26,000,000 CY).