Kinetic modeling of direct liquefaction of wyodak coal catalyzed by sulfated iron oxides

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00008a031· OSTI ID:7027388

Prodhan, V R; Holder, G D; Wonder, I; Tierney, J W

This paper describes the kinetics of the direct liquefaction of Wyodak coal using tetralin and 1000 psig (cold) H[sub 2] were experimentally measured and mathematically modeled. Experiments were carried out in a 27-cm[sup 3] horizontally shaken autoclave microreactor at 648-698 K for reaction times of 5--120 min. Some experiments were carried out at lower temperatures to determine if the model would be accurate at such conditions. Three catalyst combinations were used, Mo/Fe[sub 2]O[sub 3]/SO[sub 4], Fe[sub 2]O[sub 3]/SO[sub 4], and Fe[sub 2]O[sub 3], each with elemental sulfur. Four reaction pathways were considered: coal to asphaltenes, coal to gas, coal to oils, and asphaltenes to oils. In each pathway (except for the conversion of coal to gas), parallel thermal and catalytic reactions were included. The conversion of coal to asphaltenes was found to be primarily thermal and conversion of asphaltenes to oils was primarily catalytic, while conversion of coal to oils had significant thermal and catalytic contributions. The frequency factor and activation energy of each significant rate constant were estimated by correlating data for all temperatures (16 parameters).

• OSTI ID: 7027388
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 31:8; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ACTIVATION ENERGY
AUTOCLAVES
CATALYSIS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUEFACTION
CONVERSION
ENERGY
EXPERIMENT PLANNING
IRON COMPOUNDS
IRON OXIDES
LIQUEFACTION
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PLANNING
STIRRING
SULFIDATION
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS