Enhanced catalysis by solvent improvement. Quarterly technical progress report, 1 April-30 June 1984

Technical Report · Mon Oct 01 00:00:00 EDT 1984

OSTI ID:7150466

Garg, D

This report describes the results obtained by liquefying Illinois Number 6 coal with hydrotreater and modified hydrotreater solvents, both in the presence and absence of a catalyst. This report also describes the results obtained by recycling SRC using base liquefaction and modified solvents, both in the presence and absence of molybdenum catalyst. The use of a hydrotreater solvent as solvent in noncatalytic coal liquefaction resulted in significantly higher oil yield and coal conversion compared with both base liquefaction and modified solvents. The higher yields were thought to be due to (1) higher hydrogen content of the hydrotreater solvent resulting in higher hydrogen donor capability, and 2) lower concentration of heteroatomic compounds in the hydrotreater solvent than both base liquefaction and modified solvents, resulting in higher autocatalytic activity of the mineral matter in the coal. Removal of a part of the heteroatomic compounds from the hydrotreater solvent resulted in no noticeable improvements in coal liquefaction compared with untreated hydrotreater solvent. Similarly, addition of molybdenum catalysts in the presence of hydrotreater solvent showed only marginal improvements over the noncatalytic run. This result was unexpected because significant improvement in liquefaction with catalysts had always occurred. However, addition of molybdenum catalyst with modified hydrotreater solvent caused a noticeable improvement in both oil yield and conversion. These results infer that solvent properties are more important in coal liquefaction than is the catalyst. Recycling of SRC in noncatalytic liquefaction significantly increased oil yield with both base liquefaction and modified solvents. However, coal conversion decreased considerably with SRC recycle. Recycling SRC in catalytic coal liquefaction significantly increased oil yield with both base liquefaction and modified solvents. 3 refs., 2 figs., 8 tabs.

• Research Organization: Air Products and Chemicals, Inc., Allentown, PA (USA)
• DOE Contract Number: AC22-82PC50003
• OSTI ID: 7150466
• Report Number(s): DOE/PC/50003-33; ON: DE87002275
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
DATA
ELEMENTS
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROGENATION
INFORMATION
LIQUEFACTION
MEDIUM PRESSURE
METALS
MODIFICATIONS
MOLYBDENUM
NUMERICAL DATA
OIL YIELDS
ORGANIC SOLVENTS
RECYCLING
RESEARCH PROGRAMS
SOLVENTS
SRC PROCESS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
YIELDS