Zeolite catalysts for hdyrocracking polynuclear aromatics - phenanthrene kinetics

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6346408

Wuu, S K

Three zeolite-based catalysts were tested for the hydrocracking reaction of polynuclear aromatics (phenanthrene) by using the gradientless Berty-type reactor at three different temperatures (258/sup 0/C, 281/sup 0/C, and 298/sup 0/C) and 95 atm. operating pressure. Three commercially used silica-alumina-based catalysts were also tested at the same operating conditions for the purpose of comparison. The experimental studies were made to determine the catalytic activity of three zeolite-based catalysts, the kinetic scheme of hydrocracking reaction of phenanthrene, to compare the activity of the amphorous silica-alumina catalyst and zeolite-based catalyst in the hydrocracking reaction of polynuclear aromatic compounds, and to evaluate the activity of the zeolite-based catalyst for upgrading coal-derived liquids and shale-oil derived liquids. The hydrocracking phenanthrene activity of zeolite-based catalyst is greater than that of silica-alumina-based catalysts. The hydrocracking phenanthrene activity increases with the order CoMo sulfides < Ni-Mo sulfides < Ni-W sulfides of bimetallic combinations. Ni-W/USY is the most active catalyst in all six-tested catalysts. The deactivation rate of the catalyst is minimal for the zeolite-based catalysts. On the other hand, the deactivation rate is high in the silica-alumina-based catalysts under similar operating conditions as zeolite-based catalysts. A Langmuir-Hinshelwood dual-site mechanisms is the best model to describe the hydrocracking reaction of polynuclear aromatics over zeolite-based catalysts.

• OSTI ID: 6346408
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
&amp; Peat-- Hydrogenation &amp; Liquefaction
02 PETROLEUM
020400 -- Petroleum-- Processing
04 OIL SHALES AND TAR SANDS
040403 -- Oil Shales &amp; Tar Sands-- Refining
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUIDS
CONDENSED AROMATICS
CRACKING
DEACTIVATION
DECOMPOSITION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HIGH TEMPERATURE
HYDROCARBONS
HYDROCRACKING
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUIDS
MATERIALS
MATHEMATICAL MODELS
MEDIUM PRESSURE
MINERAL OILS
MINERALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PHENANTHRENE
POLYCYCLIC AROMATIC HYDROCARBONS
PYROLYSIS
SHALE OIL
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TESTING
THERMOCHEMICAL PROCESSES
ZEOLITES