Coal-based synthetic asphalts

Thesis/Dissertation · Wed Jan 01 00:00:00 EST 1986

OSTI ID:7055519

Kang, J H

The study investigated the technical and economic feasibility of producing a specification-grade, local-based asphalt from a raw coal available in the United States. Bench-scale hydrogenation experiments were performed in a one-gallon autoclave to produce asphalts from Illinois No. 6 bituminous coal and Clovis Point subbituminous coal. Samples from the process streams of a continuous coal liquefaction pilot plant at Wilsonville, AL were also evaluated to determine the potential for making a paving asphalt. The results showed that coal-based asphalts have a higher age-hardening rate than petroleum asphalts; also, they have a higher viscosity-temperature susceptibility (VTS) number. The high age-hardening rate of coal-based asphalts could be offset satisfactorily via catalytic hydrogenation. The VTS of these asphalts could be markedly reduced by adding a certain amount of styrene/butadiene copolymer. As a result, a specification grade, coal-based asphalt was successfully made via catalytic hydrogenation of coal combined with the incorporation of ca. 3 wt% styrene/butadiene copolymer into the coal-based asphalt. Marshall stability testing showed that coal based asphalt/aggregate compacted mixes had excellent resistance to plastic flow. Immersion compression testing revealed that the compacted mixes had a high initial compression strength and retained strength. A two-stage coal-based asphalt process was designed for producing 1000 tons/day. Economic analyses showed that the coal-based asphalt would be more expensive than currently used petroleum asphalt.

• Research Organization: Auburn Univ., AL (USA)
• OSTI ID: 7055519
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
02 PETROLEUM
ASPHALTS
AGE HARDENING
SYNTHESIS
VISCOSITY
BITUMINOUS COAL
HYDROGENATION
COAL LIQUEFACTION PLANTS
ECONOMIC ANALYSIS
SUBBITUMINOUS COAL
ADDITIVES
BUTADIENE
CATALYSTS
COMPARATIVE EVALUATIONS
COMPRESSION STRENGTH
PETROLEUM PRODUCTS
PLASTICITY
STYRENE
TEMPERATURE DEPENDENCE
ALKYLATED AROMATICS
AROMATICS
BITUMENS
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
DIENES
ECONOMICS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HARDENING
HYDROCARBONS
INDUSTRIAL PLANTS
MATERIALS
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
POLYENES
TAR
010409* - Coal
Lignite
& Peat- Pyrolysis & Carbonization- (1987-)
010500 - Coal
Lignite
& Peat- Products & By-Products
010600 - Coal
Lignite
& Peat- Properties & Composition
020500 - Petroleum- Products & By-Products