Advanced coal liquefaction research. Quarterly technical progress report, April 1-June 30, 1983

Technical Report · Sun Apr 01 00:00:00 EST 1984

OSTI ID:6256262

Two methods of improving product quality were examined which advance the SRC II process far beyond that envisioned for the original demonstration plant. All distillate product boiling above 310/sup 0/C (590/sup 0/F) was recycled to extinction without loss of total oil yield or significant increase in hydrogen consumption. This product has substantially reduced potential for genetic damage and is more amenable to upgrading. In a further refinement, all of the overhead from the high temperature, high pressure separator was passed through a vapor-phase hydrotreater. This resulted in a dramatic improvement in product quality. A proportional blend of distillate product contained less than 1 ppM of nitrogen. Total oil yield was similar to the low quality product produced in the conventional SRC II process. Coal liquefaction was carried out in three stages to better understand how the variables affect dissolution, hydrogenation and hydrocracking steps. Short contact time dissolution of Illinois No. 6 coal was conducted with minimal hydrocarbon gas yield and hydrogen consumption and high conversion to toluene and pyridine soluble products. In the hydrogenation step, liquid yield increased as temperature was increased to 412/sup 0/C (774/sup 0/F) from 356/sup 0/C (673/sup 0/F). The hydrogen level in the products went through a maximum in the range of 380 to 400/sup 0/C (716 to 752/sup 0/F), however. Very little distillate was made in the subsequent hydrocracking step at a variety of conditions. 33 figures, 10 tables.

• Research Organization: Gulf Research and Development Co., Shawnee Mission, KS (USA)
• DOE Contract Number: AC22-82PC50001
• OSTI ID: 6256262
• Report Number(s): DOE/PC/50001-18; ON: DE85006943
• Resource Relation: Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
BENCH-SCALE EXPERIMENTS
SRC-II PROCESS
OPTIMIZATION
CATALYSTS
COAL LIQUIDS
CONSUMPTION RATES
DISSOLUTION
DISTILLATES
EXPERIMENTAL DATA
FLOWSHEETS
HIGH TEMPERATURE
HYDROCRACKING
HYDROGEN
HYDROGENATION
RECYCLING
REFINING
YIELDS
CHEMICAL REACTIONS
CRACKING
DATA
DECOMPOSITION
DIAGRAMS
ELEMENTS
FLUIDS
INFORMATION
LIQUEFACTION
LIQUIDS
NONMETALS
NUMERICAL DATA
PROCESSING
PYROLYSIS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction