Direct liquefaction of low-rank coals

Technical Report · Fri Apr 01 00:00:00 EST 1988

DOI:https://doi.org/10.2172/6012369· OSTI ID:6012369

Rindt, J R; Hetland, M D; Knudson, C L; Willson, W G

Co-processing of low-rank coals (LRCs) with petroleum resids under mild conditions may produce a product that extends petroleum refinery feeds with a partially coal-derived material. These co-processing products may also provide a lower-cost way to introduce coal-derived materials into the commercial market. In this staged process, the petroleum resid acts as a solvent, aiding in the solubilization of the coal during the first stage, and both the dissolved coal and the resid are upgraded during a second-stage catalytic hydrogenation. Another method of upgrading coal in a liquefaction process is the ChemCoal Process. The process uses chemical methods to transform coal into clean solid and liquid products. It features low-severity conversion of coal in a phenolic solvent, using an alkali promotor and carbon monoxide as the reductant. Oil agglomeration has been used to reduce the ash and mineral matter in bituminous coals to obtain a product with increased heating value, reduced moisture, and lower sulfur content. This method can be used to produce a clean coal feedstock for liquefaction. During agglomeration, an oil is used to preferentially wet the organic phases of the coal, and water is used to wet the minerals, resulting in a separation of ash and water from the coal. The primary objective of this project is to expand the scientific and engineering data base of LRC liquefaction by investigating direct liquefaction processes that will produce the most competitive feedstocks or liquid fuels. The work effort which was proposed for the second year of this cooperative agreement dealt primarily with co-processing and the ChemCoal Process.

• Research Organization: North Dakota Univ., Grand Forks, ND (United States). Energy and Mineral Research Center
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FC21-86MC10637
• OSTI ID: 6012369
• Report Number(s): DOE/MC/10637-2827-Task-5.1; ON: DE92007531
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BITUMINOUS COAL
AGGLOMERATION
COAL
COPROCESSING
RESIDUAL PETROLEUM
ASHES
AUTOCLAVES
CARBON MONOXIDE
COAL LIQUEFACTION
LIGNITE
MINERALS
PHENOLS
PROGRESS REPORT
AROMATICS
BLACK COAL
BROWN COAL
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COMBUSTION PRODUCTS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROXY COMPOUNDS
LIQUEFACTION
MATERIALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PROCESSING
RESIDUES
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction