TDA Research is a technology company developing catalyst- and sorbent-based materials and products, new materials (polymers, carbons and ceramics) and military and aerospace components. TDA Research was originally formed by two staff from the Solar Energy Research Institute (now the National Renewable Energy Laboratory) in Golden, CO. TDA brings products to market either through its internal business units, spin-off companies, or through partnerships with larger firms. As of 2014, the company's SulfaTrapTM sorbents, Direct Oxidation and fullerene production technologies are in commercial use. TDA's Direct Oxidation Technology removes sulfur from hydrocarbon streams. The company's fullerene production technology is used by Frontier Carbon to manufacture up to 40 tons per year of fullerenes. TDA's SulfaTrap sulfur sorbents are now sold in multi-ton lots by SulfaTrap, LLC. The company also sells aircraft cleaning solutions to the U.S. Department of Defense. Finally, TDA developed processable conducting polymers and specialty fullerene derivatives that are available from Sigma-Aldrich.