Advanced Emissions Solutions, Inc., together with its subsidiaries, provides emission reduction technologies and specialty chemicals in the United States. It operates through two segments, Refined Coal; and Power Generation and Industrials. The company offers CyClean technology, a pre-combustion coal treatment process to enhance combustion, as well as to reduce emissions of nitrogen oxide and mercury from coals burned in cyclone boilers; and M-45 and M-45-PC technologies, which are pre-combustion coal treatment technologies used to control emissions from circulating fluidized bed boilers and pulverized coal boilers. It also provides powdered activated carbon, granular activated carbon, coal additives, and scrubber additives, as well as owns an associated lignite mine that supplies the raw material for the powdered activated carbon plant. The company serves customers in the coal-fired power generation and industrial boiler processes, as well as potable water and wastewater treatment markets. Advanced Emissions Solutions, Inc. was founded in 1996 and is headquartered in Highlands Ranch, Colorado.