Naphthene upgrading with pillared synthetic clay catalysts

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:214728

Sharma, R K; Olson, E S ^[1]

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1. Univ. of North Dakota, Grand Forks, ND (United States)

Catalytic hydrotreatment of methylcyclohexane was investigated to model upgrading of coal-derived naphthenes. Nickel-substituted synthetic mica montmorillonite (NiSMM), alumina-pillared NiSMM and Zirconia-pillared NiSMM were prepared and tested for hydrocracking and hydroisomerization of methylcyclohexane. Infrared and thermal desorption studies of the pyridine-adsorbed catalysts indicated the presence of Lewis and Bronsted acid sites. Total acidity and surface area increased with pillaring of NiSMM with polyoxy aluminum and polyoxy zirconium cations. Methylcyclohexane was reacted with these catalysts under a variety of conditions. Pillared clays gave higher gas yields and higher hydrocracking but lower hydroisomerization activity than nonpillared clay. The majority of the products were branched alkanes (isoparaffinic). These catalysts effectively use hydrogen as indicated by the minimal formation of aromatic hydrocarbons, coke, or other oligomeric materials. The effect of various operating conditions, i.e., reaction temperature, contact time, H{sub 2} pressure, and catalyst, on the product distribution will be described.

• OSTI ID: 214728
• Report Number(s): CONF-950801--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ALUMINIUM OXIDES
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CLAYS
COAL
COKE
DESORPTION
HYDROAROMATICS
HYDROCRACKING
MONTMORILLONITE
NICKEL
PH VALUE
PRESSURE DEPENDENCE
PYRIDINE
REFINING
SURFACE AREA
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
ZIRCONIUM OXIDES