Improved coal liquefaction using carbon-supported hydrogenation catalysts: Quarterly report for the period 1 July 1985-30 September 1985
Catalysts have been prepared by the impregnation of Ambersorb XE-340 and chemically modified Ambersorb XE-340 supports with ammonium molybdate solutions and tested for their activities for thiophene hydrodesulfurization. The catalysts prepared on supports modified both by reaction with various oxidizing agents and by reaction with NH/sub 3/ at 400 and 600/sup 0/C all showed very low HDS activity. This contrasts with their behavior for coal asphaltene conversion where it was found that their activity was promoted by prior reaction with NH/sub 3/ and suppressed by pre-oxidation. Much higher activity for thiophene HDS was measured for a catalyst prepared on an activated carbon (NORIT) support. Attempts have been made to improve the activity of the Ambersorb catalysts by changing the nature of the Mo precursor to make it more compatible with the aromatic and hydrophobic nature of the Ambersorb carbons. Preliminary experiments have shown some very promising results. Ambersorb XE-348 was impregnated using an molybdenum organometallic compound. It was found that the initial activity of this catalyst for thiophene HDS was almost 40% higher than for the Mo/activated carbon catalyst. Progress with the continuous flow reactor system is still being hindered by equipment failures. The vendors, Chemical Data Systems and Atuoclave Engineers, are making efforts to rectify the problems and to bring the system on stream as soon as possible. 3 refs., 6 figs., 2 tabs.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Dept. of Materials Science and Engineering
- DOE Contract Number:
- AC22-83PC60050
- OSTI ID:
- 6054451
- Report Number(s):
- DOE/PC/60050-8; ON: DE87014863
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON
CATALYTIC EFFECTS
CATALYST SUPPORTS
CHEMICAL PREPARATION
CATALYSTS
COAL LIQUEFACTION
DESULFURIZATION
HYDROGENATION
MOLYBDENUM
THIOPHENE
ASPHALTENES
CHEMICAL REACTORS
COAL LIQUIDS
EXPERIMENTAL DATA
ORGANOMETALLIC COMPOUNDS
RESEARCH PROGRAMS
SULFIDATION
ASPHALTS
BITUMENS
CHEMICAL REACTIONS
DATA
ELEMENTS
FLUIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
LIQUEFACTION
LIQUIDS
METALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
SYNTHESIS
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
400201 - Chemical & Physicochemical Properties