New technology concept for two-stage liquefaction of coal. Wyoming (Wyodak) coal study

Technical Report · Sat Feb 01 04:00:00 EST 1986

OSTI ID:6120195

Comolli, A G; Johanson, E S; Koziel, M L; MacArthur, J B; McLean, J B; Smith, T O

Hydrocarbon Research, Inc. (HRI) has completed a study of Catalytic Two-Stage Liquefaction (CTSL) processing of Wyodak coal. The work was performed during the latter portion of a twenty-seven month program for the US Department of Energy (DOE) entitled a ''New Technology Concept for Two-Stage Liquefaction of Coal.'' The key features of this process are the use of two close-coupled catalytic ebullated-bed reactors with the first stage at a lower temperature (<800/sup 0/F) than the second stage (>800/sup 0/F). Contained in the first stage is a catalyst that promotes the hydrogenation of the recycle solvent, coal and coal derived products during liquefaction. Further hydrogenation and heteroatom removal occurs in the second ebullated-bed stage. This report covers the development and evaluation of this catalytic two-stage process on Wyodak ''Clovis Point'' mine, sub-bituminous coal. Studies included five runs in a continuous ebullated-bed bench unit covering 124 days of on-stream operation and 117 batch microautoclave tests. The bench tests included studies of first- and second-stage temperature, residence time, solvent/coal ratio, recycle composition and the feeding of wet coal and coal dried by alternate methods. This report presents the results of these investigations and the data from two demonstration runs. Microautoclave results and product characterizations are also provided. During the processing of Wyodak coal, high conversions to distillate were observed with distillate yields of 63 to 67 W % M.A.F. coal or about 4.5 Bbls/M.A.F. ton. The C/sub 4/-975/sup 0/F distillates had API gravities of approximately 34 with hydrogen/carbon atomic ratios of 1.7 for IBP-650/sup 0/F and 1.35 for the 650 to 850/sup 0/F liquids. Residual oil conversions were above 85% with reported residuum yields of about 4.5 W % M.A.F. coal basis. 26 figs., 35 tabs.

• Research Organization: Hydrocarbon Research, Inc., Lawrenceville, NJ (USA)
• DOE Contract Number: AC22-83PC60017
• OSTI ID: 6120195
• Report Number(s): DOE/PC/60017-3; ON: DE86006887
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
&amp; Peat-- Hydrogenation &amp; Liquefaction
010600 -- Coal
Lignite
&amp; Peat-- Properties &amp; Composition
AUTOCLAVES
BENCH-SCALE EXPERIMENTS
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
COBALT
DATA
DIAGRAMS
DISTILLATES
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLOWSHEETS
FLUIDS
FOSSIL FUELS
FUELS
FURANS
HETEROCYCLIC COMPOUNDS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGENATION
INFORMATION
LIQUEFACTION
LIQUIDS
MATERIALS
METALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SOLVENTS
RECYCLING
RESEARCH PROGRAMS
SOLVENTS
SUBBITUMINOUS COAL
TETRAHYDROFURAN
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
TSL PROCESS
YIELDS