Birchtech Corp. (BCHT)

Birchtech Corp., formerly Midwest Energy Emissions Corp., develops and supplies specialty activated carbon and sorbent technologies for air and water purification. The company changed its name to Birchtech in 2024 to reflect its broader environmental focus.

Its established business is mercury capture for coal-fired power plants. Using its Sorbent Enhancement Additive technology together with sorbent injection, Birchtech helps utilities reduce mercury emissions in flue gas to meet environmental regulations, supplying products and technical services to power generators. The company also holds a portfolio of patents related to these emission control methods.

Birchtech is extending its sorbent expertise to water treatment, developing technologies to remove contaminants such as PFAS chemicals from drinking water and wastewater. The company is headquartered in Corsicana, Texas, and its shares trade on the NYSE American.