In situ DRIFTS study of the adsorption–oxidation of CH OH 3

SAMBETH, JORGE; M. CENTENO; PAUL ANTONIO; BRIAND LAURA; THOMAS, HORACIO JORGE; ODRIOZOLA JOSE

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

Elsevier

Lugar: Amsterdam; Año: 2000 vol. 161 p. 89 - 97

1381-1169

Abstract The oxidation of CH3OH on V2O5 has been studied from room temperature to 2508C. The reaction products were analyzed by on-line gas chromatographyGC.and the adsorbed species were characterized by Ain situB diffuse reflectance infrared Fourier transform spectroscopyDRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 infrared Fourier transform spectroscopyDRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 analyzed by on-line gas chromatographyGC.and the adsorbed species were characterized by Ain situB diffuse reflectance infrared Fourier transform spectroscopyDRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 infrared Fourier transform spectroscopyDRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 3OH on V2O5 has been studied from room temperature to 2508C. The reaction products were analyzed by on-line gas chromatographyGC.and the adsorbed species were characterized by Ain situB diffuse reflectance infrared Fourier transform spectroscopyDRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 infrared Fourier transform spectroscopyDRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 GC.and the adsorbed species were characterized by Ain situB diffuse reflectance infrared Fourier transform spectroscopyDRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 DRIFTS.. Both isothermal and non-isothermal experiments were carried out in order to identify adsorbed species in the oxidation of CH3OH on V2O5 catalysts. The interaction of CH3OH with theV2O53OH on V2O5 catalysts. The interaction of CH3OH with theV2O5 surface results in the formation of methoxy groups and V–OH species as stated by DRIFTS. The infrared spectra suggest that more than one catalytic site are involved in the adsorption process. The formation of V–OH and the resulting reduction of the vanadia catalyst leading to V4qfO and V3q groups is inferred from DRIFTS data and X-ray diffraction patterns of the used catalysts showing the presence of reduced oxide phases. As the reaction proceeds, the adsorbed methoxy species are oxidized to H2CO, formate species, partial oxidation products, CO and CO2. q2000 Elsevier Science B.V. All rights reserved. reserved. the used catalysts showing the presence of reduced oxide phases. As the reaction proceeds, the adsorbed methoxy species are oxidized to H2CO, formate species, partial oxidation products, CO and CO2. q2000 Elsevier Science B.V. All rights reserved. reserved. 4qfO and V3q groups is inferred from DRIFTS data and X-ray diffraction patterns of the used catalysts showing the presence of reduced oxide phases. As the reaction proceeds, the adsorbed methoxy species are oxidized to H2CO, formate species, partial oxidation products, CO and CO2. q2000 Elsevier Science B.V. All rights reserved. reserved. 2CO, formate species, partial oxidation products, CO and CO2. q2000 Elsevier Science B.V. All rights reserved.