Enhanced catalysis by solvent improvement. Quarterly technical progress report, 1 January-31 March 1984

Technical Report · Sat Sep 01 00:00:00 EDT 1984

OSTI ID:7043555

Garg, D

This report describes the results obtained by liquefying Illinois No. 6 coal with base liquefaction and modified solvents. Liquefaction conditions such as reaction temperature, time, initial hydrogen pressure, solvent-to-coal ratio, catalyst concentration, and type of catalyst were varied to determine their effect upon liquefaction, and to identify the reaction conditions that increase oil yields. The experimental results showed that increasing reaction temperature from 425 to 440/sup 0/C in the presence of 500 ppM molybdenum catalyst based on coal significantly increased gas yield when modified solvent was used. Both oil yield and conversion, however, decreased with increasing temperature, indicating an onset of retrogressive reaction at higher temperatures. This onset may have been due to limited hydrogen transfer either from the gas to liquid phase or from the liquid phase to thermally produced molecular fragments from the coal. The effect of these limitations on coal liquefaction was investigated by changing the initial hydrogen pressure and solvent-to-coal ratio. Catalytic coal liquefaction experiments showed that the addition of 125 ppM molybdenum based on coal significantly increased both oil yield and coal conversion over those noted in noncatalytic liquefaction with modified solvent. Both oil yield and conversion increased even more when the molybdenum concentration increased from 125 to 250 ppM. However, a further increase to 500 ppM did not cause any noticeable improvement. 9 tabs.

• Research Organization: Air Products and Chemicals, Inc., Allentown, PA (USA)
• DOE Contract Number: AC22-82PC50003
• OSTI ID: 7043555
• Report Number(s): DOE/PC/50003-32; ON: DE87002238
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
COAL
COAL LIQUEFACTION
CORRELATIONS
DATA
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
HIGH TEMPERATURE
HYDROGEN
INFORMATION
IRON
LIQUEFACTION
MATERIALS
MEDIUM PRESSURE
METALS
MODIFICATIONS
MOLYBDENUM
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC SOLVENTS
PARTIAL PRESSURE
PRESSURE EFFECTS
RESEARCH PROGRAMS
SOLVENTS
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
TRANSITION ELEMENTS
YIELDS