Structural, surface, and catalytic properties of a new bimetallic V-Mo oxynitride catalyst for hydrodenitrogenation

Journal Article · Thu Dec 08 04:00:00 EST 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100100a036· OSTI ID:6658333

Yu, C C ^[1]; Ramanathan, S ^[2]; Sherif, F ^[3]; Oyama, S T ^[4]

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1. Virginia Polytechnic Inst., Blaksburg, VA (United States)
2. Clarkson Univ., Potsdam, NY (United States)
3. Akso Nobel Central Research, Dobbs Ferry, NY (United States)
4. Virginia Polytechnic Inst., Blacksburg, VA (United States) Clarkson Univ., Potsdam, NY (United States)

A new bimetallic V-Mo oxynitride has been synthesized by temperature-programmed reaction of a bimetallic oxide precursor with ammonia gas. The surface properties of this new catalyst are investigated with temperature-programmed reduction (TPR), CO chemisorption, and N[sub 2] physisorption. The catalytic activity of the material is measured in a three-phase trickle-bed reactor at 3.1 MPa and 643 K with model liquid reactants. The bulk characteristics of the oxynitride are studied by X-ray diffraction analysis, Raman spectroscopy, and inductively coupled plasma (ICP) analysis. The new compound, of composition V[sub 2.0]Mo[sub 1.0]O[sub 1.7]N[sub 2.4], has a face-centered cubic (fcc) metallic structure arrangement, a surface area of 74 m[sup 2] g[sup [minus]1], and a CO uptake of 167 [mu]mol g[sup [minus]1]. Its catalytic activity in hydrodenitrogenation is higher than that of the pure compounds VN and Mo[sub 2]N and a commercial Ni-Mo/Al[sub 2]O[sub 3] catalyst (Shell 324). TPR in hydrogen of the passivated oxynitride shows the formation of H[sub 2]O, N[sub 2], and NH[sub 3] during activation and thermal stability to 830 K. 29 refs., 5 figs., 2 tabs.

• OSTI ID: 6658333
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:49; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
AMMONIA
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
COHERENT SCATTERING
CRYSTALLOGRAPHY
DIFFRACTION
ELEMENTS
HYDRIDES
HYDROGEN COMPOUNDS
LASER SPECTROSCOPY
MOLYBDENUM COMPOUNDS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RAMAN SPECTROSCOPY
REDUCTION
REFRACTORY METAL COMPOUNDS
SCATTERING
SPECTROSCOPY
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
WATER
X-RAY DIFFRACTION