Nature of vanadium species in SnO2—V2O5-based catalysts. Chemistry of preparation, characterization, thermal stability and reactivity in ethane oxidative dehydrogenation over V–Sn mixed oxides

Tin–vanadium mixed oxides have been prepared either from V4+–Sn4+ solutions by coprecipitation, or by the solid-state reaction between SnO(OH)2 and V2O5, and characterized by means of chemical analysis, FTIR spectroscopy, EPR, X-ray diffraction and surface area measurements. Interaction between the hydroxy groups of the tin oxohydrate and the vanadium ions, reduction of V5+ ions to V4+ and stabilization inside the rutile structure led to the formation of a VxSn1–xO2 solid solution after calcination at 700 °C. A maximum amount of 10 atom% of vanadium entered the SnO2 lattice; at values of up to x= 0.02, V4+ was likely to be homogeneously dispersed, while higher amounts probably formed V4+ oxide clusters inside the rutile matrix. In addition, amorphous V5+ oxide was formed over the rutile surface, and at an overall vanadium content greater than 20–25 atom% crystalline V2O5 was also formed.In samples where x 0.02–0.03, the solid solution was not stable at temperatures greater than 700 °C, and some of the V4+ was released from the structure forming segregated amorphous V5+ oxide, while for x 0.018.

[1]  R. Larsson,et al.  Activity measurements and spectroscopic studies of the catalytic oxidation of toluene over silica-supported vanadium oxides , 1988 .

[2]  J. Haber,et al.  Evolution of V2O5-TiO2 catalysts in the course of the catalytic reaction , 1987 .

[3]  S. Tsang,et al.  Investigation of the partial oxidation of hydrocarbons on methane coupling catalysts , 1990 .

[4]  A. Hofmeister,et al.  Infrared spectroscopy of synthetic and natural stishovite , 1990 .

[5]  K. Madhok.  Heterogeneous vapor phase oxidation of toluene over V2O2·SnO2 catalyst , 1984 .

[6]  C. Mirodatos,et al.  Oxidative Conversion of Methane and C2 Hydrocarbons on Oxides: Homogeneous versus Heterogeneous Processes , 1989 .

[7]  B. Mccormick,et al.  Vanadyl(IV)-monothio-.beta.-diketone complexes. II. Bridged compounds , 1971 .

[8]  H. Haendler,et al.  Some reactions of tin (II) chloride in nonaqueous solution , 1967 .

[9]  Y. Kera,et al.  Preparation of SnO2 and Nb2O5 Supported Vanadium Oxide Catalysts by a Column-Exchange Adsorption Method and Dispersed States of Vanadia Species , 1988 .

[10]  Shirley S. Chan,et al.  The interaction of V2O5 with Ti02(anatase): Catalyst evolution with calcination temperature and O-xylene oxidation , 1986 .

[11]  S. Åsbrink,et al.  Metal-Metal Bonding in Some Transition Metal Dioxides. , 1957 .

[12]  Y. Okamoto,et al.  X-ray photoelectron spectroscopic study of mixed oxide catalysts containing molybdenum: I. SnO2-MoO3 catalysts , 1981 .

[13]  C. Serna,et al.  Factors affecting the infrared and Raman spectra of rutile powders , 1988 .

[14]  G. Centi,et al.  Surface structure and reactivity of vanadium oxide supported on titanium dioxide. V2O5/TiO2(rutile) Catalysts prepared by Hydrolysis , 1988 .

[15]  J. Giuntini,et al.  Sol-gel preparation and transport properties of a tin oxide , 1990 .

[16]  R. Burch,et al.  Homogeneous and heterogeneous contributions to the catalytic oxidative dehydrogenation of ethane , 1993 .

[17]  P. Harrison,et al.  Tin oxide surfaces. Part 14.—Infrared study of the adsorption of ethane and ethene on tin(IV) oxide, tin(IV) oxide–silica and tin(IV) oxide–palladium oxide , 1985 .

[18]  M. Loretto,et al.  An electron microscopy investigation of tin-molybdenum oxides , 1985 .

[19]  F. Cavani,et al.  Nature of active species in the ammoxidation of toluene over V2O5/TiO2 catalysts prepared by flash-drying , 1987 .

[20]  G. Bond,et al.  Vanadium oxide monolayer catalysts Preparation, characterization and catalytic activity , 1991 .

[21]  M. Forissier,et al.  Structural properties of Sb–Sn—O mixed oxide catalysts , 1980 .

[22]  G. Lucazeau,et al.  Structural study of gels of V2O5: Vibrational spectra of xerogels , 1985 .

[23]  M. Egashira,et al.  Oxidative dehydroaromatization. III. The mechanism of oxidative dehydrodimerization process of C3-C4 olefins over Bi2O3-SnO2 catalyst , 1974 .

[24]  David J. Smith,et al.  Investigations of the tin-antimony-oxygen system by high-resolution electron microscopy , 1982 .

[25]  Y. Kubokawa,et al.  Catalytic activity of V-Sn oxides for oxidation reactions. , 1981 .

[26]  T. Ohno,et al.  FTIR-investigation of reaction of 2-propanol and acidity of vanadium oxides layered on zirconia and their surface structure , 1990 .

[27]  J. Vickerman,et al.  Catalytic activity of model Sn(1 − x)VxO2 and Ti(1 − x)VxO2 catalysts for the decomposition of N2O: The influence of charge transfer effects , 1984 .

[28]  Harold H. Kung,et al.  Transition Metal Oxides: Surface Chemistry and Catalysis , 1989 .

[29]  D. B. Rogers,et al.  Crystal chemistry of metal dioxides with rutile-related structures , 1969 .

[30]  W. J. Orville-Thomas,et al.  The infrared spectra and structure of some complex hydroxosalts , 1967 .

[31]  S. Järås,et al.  Activity measurements and ESCA investigations of a V2O5/SnO2 catalyst for the vapor-phase oxidation of alkylpyridines , 1980 .

[32]  C. Serna,et al.  Aggregation and Matrix Effects on the Infrared Spectrum of Microcrystalline Powders , 1990 .

[33]  P. Forzatti,et al.  On the surface structure of vanadia-titania catalysts: Combined laser-Raman and fourier transform-infrared investigation , 1989 .

[34]  G. Centi,et al.  Surface characterization of a grafted vanadium–titanium dioxide catalyst , 1985 .

[35]  B. M. Reddy,et al.  Characterization of vanadium oxide catalysts supported on tin dioxide by vanadium-51 and proton solid-state NMR spectroscopy , 1990 .

[36]  E. Kennedy,et al.  Comparison of the oxidative dehydrogenation of ethane and oxidative coupling of methane over rare earth oxides , 1991 .

[37]  R. Nyquist,et al.  Infrared spectra of inorganic compounds (3800-45cm[-1]) , 1971 .

[38]  D. R. Pyke,et al.  Structures of tin oxide—antimony oxide catalysts , 1980 .

[39]  P. Courtine,et al.  Catalytic Properties Of Promoted Vanadium Oxide In The Oxidation Of Ethane In Acetic Acid , 1992 .

[40]  G. Centi,et al.  Surface structure and reactivity of V$z.sbnd;Ti$z.sbnd;O catalysts prepared by solid-state reaction 1. Formation of a VIV interacting layer , 1991 .

[41]  W. H. Baur,et al.  Rutile-type compounds. IV. SiO2, GeO2 and a comparison with other rutile-type structures , 1971 .

[42]  G. Webb,et al.  Oxidation by catalysts containing vanadium , 1985 .

[43]  K. Fujii,et al.  Fourier-transform infrared investigation of structures of vanadium oxide on various supports , 1987 .

[44]  J. Lunsford,et al.  Oxidative dehydrogenation of ethane over a lithium-promoted magnesium oxide catalyst , 1989 .

[45]  Y. Kubokawa,et al.  The nature of oxygen species responsible for propene oxidation over V-Mo and V-Sn oxides. , 1982 .

[46]  J. Vickerman,et al.  Methanol oxidation over vanadium-containing model oxide catalysts. Influence of charge-transfer effects on selectivity , 1981 .

[47]  A. Andersson.  Structural Dynamics of a V2O5/SnO2 Catalyst in the Ammoxidation of 3-Picoline , 1981 .

[48]  P. Treichel,et al.  Chemistry of the cyclopentadienylmetal carbonyls. VI. Reactions of cyclopentadienylmolybdenum and -tungsten tricarbonyl compounds with phosphine ligands , 1967 .

[49]  M. Ai.  The oxidation activity and acid-base properties of SnO2-based binary catalysts: I. The SnO2V2O5 system , 1975 .

[50]  K. Mori,et al.  Activity and selectivity in catalytic reactions of buta-1,3-diene and but-1-ene on supported vanadium oxides , 1986 .

[51]  G. Deo,et al.  Reactivity of supported vanadium oxide catalysts: The partial oxidation of methanol , 1994 .

[52]  J. Moulijn,et al.  Vanadium oxide monolayer catalysts. 3. A Raman spectroscopic and temperature-programmed reduction study of monolayer and crystal-type vanadia on various supports , 1980 .

[53]  M. Sanati,et al.  Ammoxtoation of toluene over TiO2(B)-supported vanadium oxide catalysts , 1990 .

[54]  P. B. Dorain,et al.  Spin Resonance of SnO2:V and the Vanadium 3d Electron Orbital , 1965 .

[55]  B. M. Reddy,et al.  Titration of active sites for partial oxidation of methanol over V2O5/SnO2 and MoO3/SnO2 catalysts by a low-temperature oxygen chemisorption technique , 1989 .

[56]  H. S. Gutowsky,et al.  A proton magnetic resonance and electron diffraction study of the thermal decomposition of tin(IV) hydroxides , 1967 .

[57]  K. Takahata,et al.  Tin Dioxide Sensors—Development and Applications , 1988 .

[58]  P. Fejes,et al.  Kinetics and mechanism of oxidation of n-butenes over SnO2Sb2O4 catalysts , 1990 .

[59]  D. Viswanath,et al.  Catalytic vapor-phase oxidation of p-xylene over tin vanadate , 1974 .

[60]  Y. Kubokawa,et al.  Infrared and X-ray diffraction investigations of vanadium–titanium oxides for the oxidation of alcohol , 1983 .

[61]  Ram S. Katiyar,et al.  Dynamics of the rutile structure. III. Lattice dynamics, infrared and Raman spectra of SnO2 , 1971 .

[62]  N. Foster,et al.  Catalysts, Kinetics and Reactor Design in Phthalic Anhydride Synthesis , 1979 .

[63]  M. Ai.  The oxidation activity and acid-base properties of SnO2-based binary catalysts: II. The SnO2MoO3 and SnO2P2O5 systems , 1975 .

[64]  V. Farmer.  The Infrared spectra of minerals , 1974 .

[65]  P. Harrison,et al.  The selective dehydrogenation of ethane over SnO2–P2O5 catalysts , 1986 .