Robinson, Ken K. - In: Energies 2 (2009) 4, pp. 976-1006
Direct coal liquefaction has been studied and practiced since the 1930s. It was used in Germany during World War II to … and many different technologies have been investigated. Since the US is rich in coal resources, this is one way to be … notable of these being H-Coal, Exxon Donor Solvent, Solvent Refined Coal, and Two Stage Liquefaction. The key elements of …