Sublime Systems
Low-carbon cement via electrochemical production
Sublime Systems is a Massachusetts-based technology company founded in 2020 by Leah Ellis and Yet-Ming Chiang. The company specializes in producing Sublime Cement®, an ultra-low-carbon alternative to traditional Portland cement. This innovative cement is created through an electrochemical process that operates at ambient temperature, effectively eliminating CO₂ emissions.
Headquartered in Somerville, MA, Sublime Systems aims to decarbonize cement manufacturing, which contributes significantly to global CO₂ emissions. Their process transforms low-value rocks and industrial waste into cement while co-producing valuable minerals. Sublime Cement® is compatible with existing building standards and has been certified for infrastructure use. The company is focused on scaling its production, with plans for a commercial facility in Holyoke, MA, set to produce 30,000 tons per year by 2026. They also provide a marketplace for validated, standards-compliant cement, partnering with various manufacturers for real-world applications.