Heirloom Carbon
Direct air capture using limestone mineralization
Heirloom Carbon Technologies is a climate technology company based in Brisbane, California, founded in 2020. The company specializes in Direct Air Capture (DAC) to permanently remove CO2 from the atmosphere through accelerated carbon mineralization using limestone. Heirloom aims to remove 1 billion tons of CO2 by 2035 and has rapidly expanded from a small experiment in 2021 to multiple commercial facilities, employing around 130 people.
Heirloom's innovative process enhances natural carbon mineralization, allowing limestone to absorb CO2 in days instead of years. Their facilities operate on 100% additional renewable energy and focus on community governance and labor protections. The company offers carbon removal credits and scalable DAC facilities designed for global expansion. Their first commercial DAC facility in Tracy, California, began operations in November 2023, with additional facilities under development in Louisiana. Heirloom partners with major corporations like Microsoft, Meta, and JPMorgan to provide high-quality, verifiable CO2 removal solutions.