INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
PLATINUM SUPPORTED ON ALKALINE AND ALKALINE EARTH METAL-DOPED ALUMINA AS CATALYST FOR DRY REFORMING AND PARTIAL OXIDATION OF METHANE
Autor/es:
A. BALLARINI; F. BASILE; P. BENITO; IRENE BERSANI; GIUSEPPE FORNASARI; SERGIO DE MIGUEL; SILVIA MAINA; JULIETA VILELLA; ANGELO VACCARI; OSVALDO SCELZA
Revista:
APPLIED CATALYSIS A-GENERAL
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 433- p. 1 - 11
ISSN:
0926-860X
Resumen:
Pt catalysts with low metal loadings (0.02, 0.1 and 0.5 wt%) supported on alkaline (Na and K) or alkaline
earth (Mg) metals-doped alumina were tested in the catalytic partial oxidation and dry reforming of
methane. Supports were characterized by X-ray diffraction and also by determining their BET surface
area, temperature-programmed desorption of CO2, and isopropanol dehydration; while catalysts were
characterized by X-ray diffraction, temperature programmed reduction, tests of cyclohexane dehydrogenation,
temperature-programmed oxidation, and transmission electronic microscopy. The presence of
the dopants modified the thermal stability of the -Al2O3 phase by calcination at 1000 ◦C and the acidity
of the support. The ?¨ transition took place for K- and Na-doped catalysts, the acidity being almost
suppressed. Conversely, the Mg-doped -Al2O3 was thermally stable, and the catalysts still showed some
acidic sites. The catalytic performances in both partial oxidation and dry reforming processes were dependent
on the support dopants, with a more notable effect observed at low-noble-metal loadings. K- and
Na-doped catalysts showed poor activities in the catalytic partial oxidation reaction, whereas the presence
of Mg in the alumina promoted the catalytic activity. In the dry reforming reaction an improvement
was found in the catalytic activity for the sample with the highest Pt content; moreover, the K-doped
catalysts were slightly more efficient.2, and isopropanol dehydration; while catalysts were
characterized by X-ray diffraction, temperature programmed reduction, tests of cyclohexane dehydrogenation,
temperature-programmed oxidation, and transmission electronic microscopy. The presence of
the dopants modified the thermal stability of the -Al2O3 phase by calcination at 1000 ◦C and the acidity
of the support. The ?¨ transition took place for K- and Na-doped catalysts, the acidity being almost
suppressed. Conversely, the Mg-doped -Al2O3 was thermally stable, and the catalysts still showed some
acidic sites. The catalytic performances in both partial oxidation and dry reforming processes were dependent
on the support dopants, with a more notable effect observed at low-noble-metal loadings. K- and
Na-doped catalysts showed poor activities in the catalytic partial oxidation reaction, whereas the presence
of Mg in the alumina promoted the catalytic activity. In the dry reforming reaction an improvement
was found in the catalytic activity for the sample with the highest Pt content; moreover, the K-doped
catalysts were slightly more efficient.2O3 phase by calcination at 1000 ◦C and the acidity
of the support. The ?¨ transition took place for K- and Na-doped catalysts, the acidity being almost
suppressed. Conversely, the Mg-doped -Al2O3 was thermally stable, and the catalysts still showed some
acidic sites. The catalytic performances in both partial oxidation and dry reforming processes were dependent
on the support dopants, with a more notable effect observed at low-noble-metal loadings. K- and
Na-doped catalysts showed poor activities in the catalytic partial oxidation reaction, whereas the presence
of Mg in the alumina promoted the catalytic activity. In the dry reforming reaction an improvement
was found in the catalytic activity for the sample with the highest Pt content; moreover, the K-doped
catalysts were slightly more efficient.?¨ transition took place for K- and Na-doped catalysts, the acidity being almost
suppressed. Conversely, the Mg-doped -Al2O3 was thermally stable, and the catalysts still showed some
acidic sites. The catalytic performances in both partial oxidation and dry reforming processes were dependent
on the support dopants, with a more notable effect observed at low-noble-metal loadings. K- and
Na-doped catalysts showed poor activities in the catalytic partial oxidation reaction, whereas the presence
of Mg in the alumina promoted the catalytic activity. In the dry reforming reaction an improvement
was found in the catalytic activity for the sample with the highest Pt content; moreover, the K-doped
catalysts were slightly more efficient.2O3 was thermally stable, and the catalysts still showed some
acidic sites. The catalytic performances in both partial oxidation and dry reforming processes were dependent
on the support dopants, with a more notable effect observed at low-noble-metal loadings. K- and
Na-doped catalysts showed poor activities in the catalytic partial oxidation reaction, whereas the presence
of Mg in the alumina promoted the catalytic activity. In the dry reforming reaction an improvement
was found in the catalytic activity for the sample with the highest Pt content; moreover, the K-doped
catalysts were slightly more efficient.