Coal pretreatment for two stage liquefaction. Quarterly report, January 1, 1985-March 31, 1985

Technical Report · Wed May 01 04:00:00 EDT 1985

OSTI ID:5851830

Derbyshire, F J; Luckie, P T

The overall objectives of the contract are to investigate the fundamental problems and technical feasibility of selectively separating coal constituents and to determine the effects of the substantial removal of inoranic components or individual macerals on coal liquefaction. Further studies have been made of the changes in petrographic composition of Wyodak coal upon gravity fractionation of different size fractions. The composition of -200 mesh material is being examined in order to explain observed differences as it is prepared from larger size fractions. Experiments have shown that a vitrinite-enriched gravity float fraction of Wyodak coal does not perform as well as the parent coal in short reaction time thermal liquefaction. Differences may be attributable to the reduction in mineral matter content of the gravity fraction and/or the effects of the method of sample preparation. Coal pretreatment by low-temperature hydrogenation (350/sup 0/C) in the presence of an active impregnated catalyst has been shown to substantially improve the overall conversion and product selectivity obtained after subsequent short reaction time liquefaction (425/sup 0/C, 10 min). It is considered that the pretreatment, under conditions more favorable to promoting hydrogenation and minimizing condensation and cracking, allows improved control of the initial, and most critical, stages of coal conversion. 8 refs., 1 fig., 9 tabs.

• Research Organization: Pennsylvania State Univ., University Park (USA). Coll. of Earth and Mineral Sciences
• DOE Contract Number: FG22-84PC70003
• OSTI ID: 5851830
• Report Number(s): DOE/PC/70003-T4; ON: DE85011542
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL PREPARATION
COMMINUTION
COMPARATIVE EVALUATIONS
CRUSHING
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FRACTIONATION
FUELS
HYDROGENATION
INFORMATION
LIQUEFACTION
MACERALS
MATERIALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NUMERICAL DATA
PETROGRAPHY
REFRACTORY METAL COMPOUNDS
RESEARCH PROGRAMS
SEPARATION PROCESSES
SUBBITUMINOUS COAL
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TSL PROCESS
YIELDS