New iron oxide catalyst reduction activities with hydrogen sulfide and hydrogen

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6844766

Hattori, H; Jones, F A; Ogawa, T; Knudson, C L; Radonovich, L J; Stenberg, V I

Various types of catalysts have been used for coal liquefaction. Among these catalysts, molybdenum and iron catalysts are most frequently used and they are usually combined with other metal oxides. Molybdenum catalysts, in the form of Co/Mo/Al/sub 2/O/sub 3/ wherein this notation represents some form of the metal oxides and the last species is the support, have been used in the H-Coal process. In others, iron catalysts have been used in the form of red mud which is mixed with elemental sufur. The activity of iron catalysts has generally been regarded as low when compared with that of molybdenum catalysts. However, iron oxide catalysts became highly active for the conversion of coal-related model compounds when used in the presence of H/sub 2/S and H/sub 2/. For coal liquefaction in the absence of a heterogeneous catalysts, the use of a mixture of H/sub 2/S and H/sub 2/ instead of H/sub 2/ resulted in an increase in conversion. Because of the interaction of H/sub 2/S with Fe/sub 2/O/sub 3/ and the fact that iron is presently the lowest cost transition metal, iron was selected as the basis metal for a new set of heterogeneous catalysts specifically designed for coal liquefaction using the H/sub 2/S-H/sub 2/ reducing gas medium. The catalysts were subjected to two reactions: hydrocracking of diphenylmethane to toluene and benzene, a model compound for the Ar-C bond cleavage of the coal structure, and hydrocracking of diphenyl ether to phenol and benzene, a model compound for the Ar-O bond cleavage of the coal structure. The reaction conditions for these reactions are summarized in Table 2. 4 references, 2 tables.

• Research Organization: North Dakota Univ., Grand Forks (USA)
• DOE Contract Number: FC21-83FE60181
• OSTI ID: 6844766
• Report Number(s): DOE/FE/60181-85; CONF-840805-12; ON: DE84009700
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL BONDS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CLEAVAGE
COAL LIQUEFACTION
COMPARATIVE EVALUATIONS
CRACKING
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
ELEMENTS
EXPERIMENTAL DATA
HYDROCRACKING
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LIQUEFACTION
MICROSTRUCTURE
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PYROLYSIS
STRUCTURAL MODELS
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS