Studies of the initial reactions that occur during direct coal liquefaction
Reactions that occur during preconversion processing of coal in direct liquefaction can be either beneficial or harmful. The objectives of this work are to identify the types of compounds and process conditions that give rise to retrogressive reactions during preconversion processing. Experiments have been performed to evaluate the impacts of temperature, catalysts, mineral matter, and hydrogen donors on these reactions. Initial studies have been carried out using dibenzyl ether (DBE) because ether linkages represent one type of bonding believed to be present in coal (1). Previous studies have analyzed the kinetics and mechanisms of thermolysis of DBE (2,3) and have also used DBE to study effects of process variables in coal liquefaction (4). Results of thermal reactions with DBE have shown that the main reaction products are toluene, benzaldehyde, benzyl alcohol and benzene (2). In the presence of catalysts such as ZnCl/sub 2/, the product distributions are more complicated and can obtain significant amounts of material with higher molecular weights than DBE (5,6). 8 refs., 2 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5907513
- Report Number(s):
- SAND-89-0853C; CONF-890902-8; ON: DE89011542
- Resource Relation:
- Conference: 198. American Chemical Society national meeting, Miami, FL, USA, 10-15 Sep 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM OXIDES
CATALYTIC EFFECTS
COAL LIQUEFACTION
CHEMICAL REACTIONS
MOLYBDENUM
NICKEL
ZINC CHLORIDES
ADDITIVES
ETHERS
KAOLINITE
MOLECULAR WEIGHT
PYRENE
YIELDS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
AROMATICS
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
CONDENSED AROMATICS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
LIQUEFACTION
METALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
ZINC COMPOUNDS
ZINC HALIDES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction