Effects of solvent characteristics on Wyodak coal liquefaction. Annual technical progress report, May 1976--April 1977

Technical Report · Sun May 15 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/5294910· OSTI ID:5294910

Silver, H. F.

Three different solvents have been prepared. Solvent F-1 was produced from recycle SRC operation of Wyodak coal at Wilsonville, Alabama. Because hydrogen donor capacity seems to be an important solvent property, solvent F-2 was prepared by hydrogenating the F-1 solvent over a Co-Mo catalyst under mild reaction conditions, and solvent F-3 was prepared using severe hydrogenation conditions. The tetralin content of F-1, as measured using procedures developed in this work, was increased from 2.3 wt. % to 2.7 wt. % in F-2 and 6.1 wt. % in F-3. Several preliminary coal-solvent runs were performed in order to establish reaction conditions which would produce results comparable to the results obtained in flow reactor studies of Wyodak coal at Wilsonville and at HRI. This work indicates that mass transfer of hydrogen from the gas phase to the solid-liquid phase may be a rate limiting step. Batch reactor runs in which Wyodak coal and solvent under a cold reactor pressure of 2000 psig were heated to 850/sup 0/F and held at this temperature for 40 minutes gave a conversion of 91.7 wt. %. In single runs using F-1, F-2 and F-3 solvents under the same reaction conditions, little, if any, difference was seen in the extent of Wyodak coal liquefaction, asphaltene production or nitrogen removal. F-3 solvent did produce more hexane soluble oil than the other two solvents. Nitrogen type analysis shows that nitrogen compounds in coal-derived liquids contain a high percentage of quinoline types which may be difficult to remove.

• Research Organization: Wyoming Univ., Laramie (USA)
• OSTI ID: 5294910
• Report Number(s): FE-2367-5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COMPARATIVE EVALUATIONS
CRYOGENIC FLUIDS
DENITRATION
ELEMENTS
FLUIDS
HYDROCARBONS
HYDROGENATION
LIQUEFACTION
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
REMOVAL
SOLVENTS
TAR
TETRALIN