Activity testing of fine-particle size, unsupported, iron-based catalysts
The efficiency of the initial reactions of coal during coal liquefaction will have significant impacts on downstream processing (including catalyst usage, reaction severity, product yields, product quality) and hence on process economics. Reactions that result in compounds with low molecular weights and decreased boiling points are beneficial, whereas retrogressive reactions, which yield higher molecular weight compounds that are refractory to further processing, decrease process efficiency. Likewise, reactions that result in decreased sulfur, nitrogen, and oxygen contents and increased hydrogen contents in the products are beneficial. The use of unsupported fine-particle (<40 nm) catalysts during initial coal processing has the potential to enhance desired reactions and minimize retrogressive reactions. The potential advantages of using fine-particle size catalysts include improved dispersion of the catalyst, improved coal/catalyst contact, and the potential for using low amounts ([le]0.5% based on the weight of coal) of these novel catalysts due to their very high surface areas. These catalysts could be combined with the coal or coal-solvent mixture as either active catalysts or catalyst precursors that would be activated in situ. Several methods of combining catalyst and coal, such as physical mixing or using a catalyst-hydrogen donor slurry, are possible. Ideally the fine-particle catalysts would be inexpensive enough to be disposable.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 7149845
- Report Number(s):
- SAND-92-2550C; CONF-930304-4; ON: DE93006293
- Resource Relation:
- Conference: 205. American Chemical Society national meeting, Denver, CO (United States), 28 Mar - 2 Apr 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
PERFORMANCE TESTING
COAL LIQUEFACTION
IRON COMPOUNDS
CATALYTIC EFFECTS
AUTOCLAVES
CHEMICAL ANALYSIS
COAL LIQUIDS
EXPERIMENT PLANNING
GAS CHROMATOGRAPHY
IMPREGNATION
ORGANIC SOLVENTS
CHROMATOGRAPHY
FLUIDS
LIQUEFACTION
LIQUIDS
PLANNING
SEPARATION PROCESSES
SOLVENTS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction