Liquefaction of coals using ultra-fine particle, unsupported catalysts: In situ generation by rapid expansion of supercritical fluid solutions

Technical Report · Thu Aug 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/5060284· OSTI ID:5060284

The program objective is to generate ultra-fine catalyst particles (20 to 400 {Angstrom} in size) and quantify their potential for improving coal dissolution in the solubilization stage of two-stage catalytic-catalytic liquefaction systems. It has been shown that catalyst activity increases significantly with decreasing particle size for particle sizes in the submicron range. Ultra-fine catalyst particle generation will be accomplished using a novel two-step process. First, the severe conditions produced by a supercritical fluid (e.g., supercritical H{sub 2}O or CO{sub 2}) will be used to dissolve suitable catalyst compounds (e.g., Fe{sub 2}O{sub 3}, FeS{sub 2}, and/or Fe(CO){sub 5}). Sulfur containing compounds may be added to the supercritical solvent during catalyst dissolution to enhance the catalytic activity of the resulting ultra-fine, iron based, catalyst particles.

• Research Organization: Textron, Inc., Everett, MA (United States). Textron Defense Systems
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-90PC90053
• OSTI ID: 5060284
• Report Number(s): DOE/PC/90053-T1; ON: DE92015948
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CARBONYLS
CATALYTIC EFFECTS
CATALYSTS
SYNTHESIS
COAL LIQUEFACTION
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
PARTICLE SIZE
PROGRESS REPORT
SOLUBILITY
SUPERCRITICAL STATE
CHALCOGENIDES
DOCUMENT TYPES
LIQUEFACTION
OXIDES
OXYGEN COMPOUNDS
SIZE
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction