Coal liquids hydrotreatment. catalyst pore size effects

Conference · Sun Jan 01 04:00:00 EST 1978 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:6522048

Ahmed, M M; Crynes, B L

When three commercial cobalt/molybdenum/alumina catalysts, CM1, CM2, and CM3, with most-frequent pore-radii values of 33, 25, and 30 (micropore)/890 (macropore) A, respectively, were used to hydrotreat three coal-derived liquids, the sulfur content of an FMC Corp. COED process (FMC) oil was decreased to 0.05% from 0.35% under the most severe operating conditions: 381/sup 0/C, 1500 psig, and 3.14 space-time over CM1. The CM2 catalyst of larger surface area was less active, suggesting pore diffusional limitations to the process. The bidisperse CM3 was more active than the monodisperse CM1 for sulfur removal from a raw anthracene oil (RAO) at 316/sup 0/C, but the reverse was true at 343/sup 0/C. CM1 was more efficient for nitrogen removal from the RAO at both temperatures. CM3 was superior at 371/sup 0/C, and CM1 was superior at 427/sup 0/C, in denitrogenating the FMC oil at 1500 psig. These results were attributed to oil hydrocracking at higher temperatures. All the catalysts tested had the same composition, 3.5% CoO/12.5%MoO/sub 3//1.5% SiO/sub 2//Al/sub 2/O/sub 3/, and respective surface areas of 240, 303, and 286 sq m/g. The untreated oils contained 1.13-1.62% by wt total nitrogen and 0.35-0.62% by wt total sulfur. Coking studies on these catalysts were made with a Synthoil II oil.

• Research Organization: Oklahoma State Univ.
• OSTI ID: 6522048
• Report Number(s): CONF-780902-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 23:4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
CARBONIZATION
CATALYSTS
CHEMICAL REACTIONS
COAL LIQUIDS
COKING
COMPARATIVE EVALUATIONS
CRACKING
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
DESULFURIZATION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
HYDROCRACKING
INFORMATION
LIQUIDS
MICROSTRUCTURE
NONMETALS
NUMERICAL DATA
PERFORMANCE
POROSITY
PURIFICATION
PYROLYSIS
REMOVAL
SULFUR
THERMOCHEMICAL PROCESSES