Advanced Emissions Solutions, Inc., together with its subsidiaries, provides environmental technologies and specialty chemicals to the coal-burning electric power generation industry primarily in the United States. It operates through three segments: Refined Coal, Emission Control, and CO2 Capture. The company develops and markets refined coal technologies, including leasing of refined coal facilities for control of nitrous oxides and mercury. It also engages in the development and sale of systems, field testing, chemicals, and services primarily related to control of emissions of mercury, acid gases, sulfur dioxide, and particulate matter for coal and solid fuel fired boilers primarily used in electric generation. In addition, the company is involved in the research and development of carbon dioxide capture technology through contracts supported by the Department of Energy and industry participants; and development of a technology that allows coal to be burned with lower mercury emissions. Further, it sells coal; supplies emissions control systems, including powdered activated carbon injection systems and dry sorbent injection systems to control sulfur dioxide, sulfur trioxide, and hydrogen chloride; offers flue gas conditioning systems; and licenses technology and provides consulting services. The company was founded in 1996 and is based in Highlands Ranch, Colorado.