Liquefaction of bituminous coals with added catalysts. [Evaluation includes operability differences]

Technical Report · Wed Sep 01 04:00:00 EDT 1982

OSTI ID:6837941

Catalyst addition studies were carried out during SRC I and SRC II processing of bituminous coals from the Loveridge, Ayrshire, Blacksville No. 2, Powhatan No. 5 and Pyro Mines. While these coals can generally be liquefied successfully in both modes of operation, the catalysts were added in an attempt to improve yields, product quality and operability. At 450/sup 0/C, 2250 psig and 1.0 hour residence time in the SRC II mode with Loveridge coal, two hydrodesulfurization catalysts (NiMo and CoMo on alumina) and an ammonium molybdate emulsion increased total oil yield by 10 wt % (based on MF coal). Molybdenum added by aqueous impregnation of the coal, pyrite and ferric oxide each increased oil yield by about 6 wt %, while a ferrous sulfate emulsion had little effect. Distillate product analyses were not changed by the additives except for a reduction in sulfur with the molybdenum catalysts. There was a significant improvement in operability with all additives except the ferrous sulfate emulsion. Molybdenum added as an emulsion was an effective catalyst at concentrations as low as 0.05 wt %, based on MF coal. At 455/sup 0/C, 1800 psig and 1.0 hour residence time in the SRC II mode with Loveridge coal, total oil yield was increased by 4 to 11-1/2 wt % (based on MF coal) by pyrite addition relative to the point where operation could no longer be sustained without additive. This range in yields was due to differences in the catalytic activity of three pyrite samples. Operation was generally satisfactory at these conditions with the iron additives whereas it was impossible without added catalyst. Iron oxide additive was much less effective than pyrite at the lower pressure but was nearly equivalent at 2250 psig. The Indiana VI seam coal (Ayrshire) was much more responsive to pyrite addition than the Pittsburgh seam coals (Loveridge, Blacksville No. 2 and Powhatan).

• Research Organization: Pittsburg and Midway Coal Mining Co., Shawnee Mission, KS (USA)
• DOE Contract Number: AC22-81PC40005; AC22-79ET14800
• OSTI ID: 6837941
• Report Number(s): DOE/PC/40005-20; ON: DE83000309
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ADDITIVES
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
COAL
COAL LIQUEFACTION
COBALT
DATA
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
IRON COMPOUNDS
IRON OXIDES
IRON SULFATES
IRON SULFIDES
LIQUEFACTION
MATERIALS
METALS
MINERALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
PYRITE
SRC PROCESS
SRC-II PROCESS
SULFATES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS