Novel bimetallic dispersed catalysts for temperature-programmed coal liquefaction. Technical progress report, April 1994--June 1994

Technical Report · Fri Jul 01 04:00:00 EDT 1994

OSTI ID:10188424

Schmidt, E; Song, C; Schobert, H H

Coal liquefaction involves cleavage of methylene and dimethylene bridges connecting polycyclic aromatic units. The selected compound for model coal liquefaction reactions is 4-(1-naphthylmethyl)bibenzyl (NMBB). This report describes the synthesis and screening of several iron containing complexes as precursors of dispersed catalysts for hydrocracking of NMBB. Experiments were carried out at 400{degrees}C for 30 min under 6.9 MPa H{sub 2} pressure. All catalyst precursors converted NMBB predominately into naphthalene and 4-methylbibenzyl. Small amounts of secondary products were formed by hydrogenation, isomerization and fragmentation of the primary products. The greatest activity among the tested catalysts was found using superfine iron oxide with added sulfur. An experiment of the high surface Fe{sub 2}O{sub 3} without added sulfur gave only moderate conversion. Organometallics with relatively high volatility show higher activity than the inorganic system iron oxide. The thiocubane type cluster Cp{sub 4}Fe{sub 4}S{sub 4} showed the lowest activity. The beneficial effect of sulfur was also demonstrated in a reaction of iron pentacarbonyl and NMBB. A sulfur-free run showed substantially smaller conversion, whereas an experiment with added sulfur gave 15.6 % higher conversion. The catalytic activity of Cp{sub 2}Fe{sub 2}(CO){sub 4} is the highest among the sulfur-free catalyst precursors.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-92PC92122
• OSTI ID: 10188424
• Report Number(s): DOE/PC/92122--T7; ON: DE95001171
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
ALKYLATED AROMATICS
AROMATICS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL REACTION YIELD
COAL LIQUEFACTION
HYDROCRACKING
HYDROGENATION AND LIQUEFACTION
IRON COMPLEXES
IRON OXIDES
IRON SULFIDES
NAPHTHALENE
ORGANOMETALLIC COMPOUNDS
PROGRESS REPORT