Birchtech Corp. provides specialty activated carbon technologies for air and water purification in the United States. The company provides mercury capture solutions. Its Sorbent Enhancement Additive (SEA) technology offers total mercury control with solutions based on a thorough scientific understanding of actual and probable interactions involved in mercury capture in coal-fired flue gas. In addition, the company develops water purification technologies on chemicals, such as PFAS and PFOS. The company was formerly known as Midwest Energy Emissions Corp. and changed its name to Birchtech Corp. in October 2024. The company is headquartered in Corsicana, Texas.