Mild coal pretreatment to improve liquefaction reactivity

Technical Report · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/5745144· OSTI ID:5745144

Miller, R L

This report describes work completed during the fifth quarter of a three year project to study the effects of mild chemical pretreatment on coal dissolution reactivity during low severity liquefaction or coal/oil coprocessing. The overall objective of this research is to elucidate changes in the chemical and physical structure of coal by pretreating with methanol or other simple organic solvent and a trace amount of hydrochloric acid and measure the influence of these changes on coal dissolution reactivity. Work this quarter focused on analytical characterization of untreated and treated Wyodak subbituminous coal and Illinois {number sign}6 bituminous coal. Mossbauer spectroscopy and x-ray diffraction techniques were used to study the effect of methanol/HCl pretreatment on the composition of each coal's inorganic phase. Results from these studies indicated that calcite is largely removed during pretreatment, but that other mineral species such as pyrite are unaffected. This finding is significant, since calcite removal appears to directly correlate with low severity liquefaction enhancement. Further work will be performed to study this phenomenon in more detail.

• Research Organization: Colorado School of Mines, Golden, CO (United States). Dept. of Chemical Engineering and Petroleum Refining
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-90PC90289
• OSTI ID: 5745144
• Report Number(s): DOE/PC/90289-T3; ON: DE92008688
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BITUMINOUS COAL
DISSOLUTION
CALCITE
REMOVAL
SUBBITUMINOUS COAL
CATALYSTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COPROCESSING
DRYING
HYDROCHLORIC ACID
METHANOL
ORGANIC SOLVENTS
PROGRESS REPORT
RESIDUES
SPECTROSCOPY
X-RAY DIFFRACTION
ALCOHOLS
BLACK COAL
CARBONACEOUS MATERIALS
CARBONATE MINERALS
CHLORINE COMPOUNDS
COAL
COHERENT SCATTERING
DIFFRACTION
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
LIQUEFACTION
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PROCESSING
SCATTERING
SOLVENTS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction