coal liquefaction us4176040

  • Coal Liquefaction | Student Energy

    Coal Liquefaction is the process of converting coal to liquid fuels. Coal Liquefaction Definition. The process of coal liquefaction creates synthetic liquid fuels from solid coal as substitutes for various petroleum products. There are two types of liquefaction - direct and indirect Williams R. H., Larson, E. D. (December 2003). A comparison of direct and indirect liquefaction technologies for ...

  • Direct Coal Liquefaction: Lessons Learned

    Why Coal Liquefaction? Alternate source for liquid fuels: national energy security ♦Germany, Japan, South Africa Production of a clean and reactive solid fuel: SRC ♦Liquids are a secondary product that may improve economics Oil embargos in the 1970's reinforced need for an alternate source of transportation fuel

  • 10.6. Direct Liquefaction Processes |

    Reason for Discussion of Direct Liquefaction of Coal in Gasifipedia As the following discussion of Direct Coal Liquefaction (DCL) explains, the fundamental process approach of DCL does not involve gasification at all. Therefore it would seem to be entirely out of scope of Gasifipedia. However, the following considerations require that discussion of DCL be included:

  • Coal liquefaction - Wikipedia

    Coal liquefaction is a process of converting coal into liquid hydrocarbons: liquid fuels and petrochemicals.This process is often known as "Coal to X", where X can be many different hydrocarbon-based products. However, the most common process chain is "Coal to Liquid Fuels" (CTL).

  • Coal Liquefaction | Request PDF - ResearchGate

    Liquefaction can be direct, from the coal itself, or indirect, from synthesis gas (CO and H2) obtained by gasification of the coal. Coal liquefaction incorporates both an increase in the H/C ratio ...

  • An overview of conversion of residues from coal ...

    Direct coal liquefaction (DCL) is a process for converting coal to synthetic oils, which can be refined to make transportation fuels. Residue from this process contains inorganic material such as mineral matter originating from the coal and catalysts, and organic matter such as unconverted coal, heavy oils, pre-asphaltenes and asphaltenes.