Queens Carbon develops an energy-efficient cement manufacturing platform that produces carbon-neutral supplementary cementitious materials (SCMs) and aims to enable low-energy, ASTM-compliant cement products. Its process uses novel hydrothermal chemistry—steam and pressure—to drive reactions at roughly half the temperature of conventional cement production. The company’s flagship Q-SCM can replace up to 50% of conventional cement in concrete and is designed for modular on-site production at existing cement plants. Queens Carbon plans to double its team, move into an expanded facility, and build a 2,000-ton-per-year demonstration pilot at Buzzi Unicem USA’s Stockertown, Pennsylvania plant. The company is also pursuing next-generation hydraulic cement to enable low-cost carbon capture and potential 100% replacement of traditional cement. Financially, the company has secured a $10M seed round and previously received a $14.5M ARPA-E grant, bringing total funding to $30M. Queens Carbon develops a low-energy patented hydrothermal process to produce carbon-neutral supplemental cementitious materials (Q-SCMs) from industry-standard raw materials. Its Q-SCMs can replace 20–50% of the high-CO2 binder in cement, aiming to reduce greenhouse gas emissions while remaining cost competitive. The company plans to deploy a pilot plant capable of producing 10 tonnes of SCMs daily at an existing cement production site in partnership with a commercial cement industry partner. Queens Carbon was selected by the U.S. Department of Energy’s ARPA-E to receive $14.5M in SCALEUP funding to scale and pilot its process, building on prior ARPA-E-funded work. Leadership says the pilot will accelerate commercialization and optimization toward gigaton-scale CO2 reductions via avoidance, capture, and production of carbon-neutral cementitious products. Headquartered in Pine Brook, N.J., Queens Carbon emphasizes creating a scalable supply of SCMs to meet increasing global cement demand.

Total raised

$25M

Funding rounds

2

Latest round

Seed

Latest activity

Apr 2025