Improved catalysts for coal liquefaction: Final report

Technical Report · Fri Apr 01 04:00:00 EST 1988

OSTI ID:7061221

Haynes, Jr, H W

Heterogeneous catalysts prepared from a variety of support materials were tested for activity and activity maintenance while processing coal-derived liquids under high severity conditions (P = 2000 psi, T = 800--825/degree/F, WHSV = 2-3). Conventional alumina supported hydrotreating catalysts were promoted with alkali and alkaline earth metals subjected to similar testing. Initial activity screening was conducted in a batch microautoclave reactor. Activity maintenance was evaluated in a continuous trickle bed reactor with run lengths of up to 500 hours. The feedstocks employed ranged from a hydrogen deficient light creosote oil to a mildly hydrogenated medium creosote oil spiked with ash-free, coal-derived-residuum material. The fresh and used catalysts were characterized structurally and subjected to analysis for carbon on catalyst, metals agglomeration and catalyst acidity. The benchmark commercial catalysts (Amocat 1A and Shell 324M) experienced minimal deactivation early in the run and maintained activity well despite the high severity conditions employed. Several of the laboratory preparations also performed well: most notably a NiMo/titania--alumina catalyst was competitive with the benchmark catalyst in terms of both activity and activity maintenance. A positive correlation was observed between ''lined out'' activity and pore volume in the 60--200 A diameter range. A correlation was also developed between carbon on catalyst and relative acid density. 116 refs., 100 figs., 94 tabs.

• Research Organization: Wyoming Univ., Laramie (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-84PC70812
• OSTI ID: 7061221
• Report Number(s): DOE/PC/70812-13; ON: DE88010547
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CARBON
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL LIQUEFACTION
COBALT
COMPARATIVE EVALUATIONS
DEACTIVATION
DEPOSITION
DOCUMENT TYPES
ELEMENTS
HYDROGENATION
LIQUEFACTION
METALS
MOLYBDENUM
NICKEL
NONMETALS
PERFORMANCE TESTING
PROGRESS REPORT
PROMOTERS
SYNTHESIS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS