Synthesis and reactivity of new bimetallic oxynitrides

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

OSTI ID:214802

Oyama, S T; Ramanathan, S; Yu, C C ^[1]

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1. Virginia Polytechnic Institute and State Univ., Blacksburg, VA (United States)

A new series of bimetallic oxynitride catalysts, M{sub 1}M{sub 2}O{sub x}N{sub y} (M{sub 1} = V{sub 1}, Nb, Cr, Mn and Co, M{sub 2} = Mo or W), was prepared by nitriding the bimetallic oxide precursors in an ammonia gas stream at 1000 cm{sup 3}/min (6.8x10{sup 2} {mu}mol s{sup -1}) while the temperature was raised at 5 K/min (8.3x10{sup -2} K s{sup -1}). The catalysts were characterized by x-ray diffraction, x-ray photoelectron spectroscopy, CO chemisorption and surface area measurements. The catalytic activity of these catalysts for mixture containing 3000 ppm sulfur (dibenzothiophene), 2000 ppm nitrogen (quinoline), 500 ppm oxygen (benzofuran), 20 wt% aromatics (15 wt% tetralin and 5 wt% amylbenzene) and balance aliphatics (tetradecane). The activities of the bimetallic oxynitrides were compared to a commercial sulfided Ni-Mo/Al{sub 2}O{sub 3} catalyst tested at the same conditions. The bimetallic oxynitrides were active for quinoline HDN and V-Mo-O-N exhibiting higher HDN activity than the commercial Ni-Mo/Al{sub 2}O{sub 3} catalyst. The HDS activity of the bimetallic oxynitrides ranged from 9-37% with Co-Mo-O-N showing the highest HDS activity among the oxynitrides tested.

• OSTI ID: 214802
• Report Number(s): CONF-950801--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
02 PETROLEUM
AROMATICS
CATALYSTS
CATALYTIC EFFECTS
CHEMISORPTION
CHROMIUM NITRIDES
COBALT COMPOUNDS
DENITRATION
DESULFURIZATION
FOSSIL FUELS
MANGANESE NITRIDES
MOLYBDENUM NITRIDES
NIOBIUM NITRIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
POLYCYCLIC SULFUR HETEROCYCLES
REFINING
SURFACE AREA
TETRALIN
TUNGSTEN NITRIDES
VANADIUM NITRIDES
X-RAY DIFFRACTION