Coal liquefaction is actively being used in Kentucky and Ohio, however future projects could be limited in some states by the Renewable Fuel Standard which originated in 2005.
U.S. Coal to Liquid Fuels Projects Perry County, Kentucky Lima, Ohio For example, in the United States, the Renewable Fuel Standard and low-carbon fuel standard such as enacted in the State of California reflect an increasing demand for low carbon footprint fuels. It originated with the Energy Policy Act of 2005 and was expanded and extended by the Energy Independence and Security Act of 2007. 
