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Title: Naphthene upgrading with pillared synthetic clay catalysts

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.
Authors:
;  [1]
  1. Univ. of North Dakota, Grand Forks, ND (United States)
Publication Date:
OSTI Identifier:
214728
Report Number(s):
CONF-950801--
TRN: 96:000922-0199
Resource Type:
Conference
Resource Relation:
Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
Publisher:
American Chemical Society, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; MONTMORILLONITE; CATALYTIC EFFECTS; NICKEL; HYDROAROMATICS; REFINING; ZIRCONIUM OXIDES; ALUMINIUM OXIDES; CATALYSTS; CLAYS; COAL; COKE; DESORPTION; HYDROCRACKING; PYRIDINE; SURFACE AREA; CATALYTIC CRACKING; SURFACE PROPERTIES; PH VALUE; TIME DEPENDENCE; PRESSURE DEPENDENCE; TEMPERATURE DEPENDENCE