INVESTIGADORES
CORNAGLIA Laura Maria
artículos
Título:
Ru/La2O3SiO2 catalysts for hydrogen production in membrane reactors
Autor/es:
B.M. FAROLDI, E.A. LOMBARDO, L.M. CORNAGLIA
Revista:
CATALYSIS TODAY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2011 vol. 172 p. 209 - 217
ISSN:
0920-5861
Resumen:
Binary La2O3-SiO2 supports were
employed to obtain active, stable Ru catalysts with high dispersions for the
dry reforming of methane. Supports with 15, 27, 40 and 50 wt.% of La2O3 were
prepared by incipient wetness impregnation of La(NO3)3 on SiO2. The Ru loading was 0.6
wt.% for all catalysts.
The solids were evaluated in a fixed-bed reactor
under differential conditions. Previously, they were reduced at 550°C. All the formulations
were stable for at least 100 h on stream. Subsequently, the most active
catalyst (Ru/La2O3(50)-SiO2) was tested in a membrane reactor using different
feed mixtures with and without O2. The
reactor configuration was formed by a fixed-bed reactor followed by a membrane
reactor. The methane conversion increased when the CO2/CH4 ratio increased from 1.0
to 1.9 and when oxygen was added to the feed. Operating under conditions of combined
reforming (oxygen addition) and CO2/CH4 ratio equal to 1, a high production of
hydrogen was also achieved in the membrane reactor.