Studies of the initial reactions that occur during direct coal liquefaction

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5754336

Stohl, F. V.

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, pressure, catalysts, mineral matter, and hydrogen donor 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. Previous studies have analyzed the kinetics and mechanism of thermolysis of DBE and have also used DBE to study effects of process variables in coal liquefaction. Results of thermal reactions with DBE have shown that the main reaction products are toluene, benzaldehyde, benzyl alcohol and benzene. In the presence of catalysts such as ZnCl{sub 2}, the product distributions are more complicated and can contain significant amounts of material with higher molecular weights than DBE. 8 refs., 8 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5754336
• Report Number(s): SAND-89-2223C; CONF-891081--1; ON: DE90000843
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ADDITIVES
ALCOHOLS
ALDEHYDES
ALKYLATED AROMATICS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
AROMATICS
BENZALDEHYDE
BENZENE
BENZYL ALCOHOL
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COAL LIQUEFACTION
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
IRON COMPOUNDS
IRON SULFIDES
KAOLINITE
LIQUEFACTION
MINERALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PRESSURE EFFECTS
PYRITE
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TOLUENE
TRANSITION ELEMENT COMPOUNDS
YIELDS
ZINC CHLORIDES
ZINC COMPOUNDS
ZINC HALIDES