MODELO CINÉTICO DEL REFORMADO SECO DE METANO EN CATALIZADORES DE RODIO SOPORTADOS SOBRE La2O3

JOHN F. MÚNERA, LAURA M. CORNAGLIA, SILVIA IRUSTA, EDUARDO A. LOMBARDO, DEBORAH V. CESAR, MARTIN SCHMAL

Santa Fe - Argentina

Congreso; XIV CONGRESO ARGENTINO DE CATÁLISIS; 2005

Universidad Nacional del Litoral

In the present work, the kinetics of the dry reforming of methane over Rh/La2O3 catalysts was studied. A reaction mechanism was proposed and a kinetic expression for the reaction rate of methane was derived, which is found to predict satisfactorily the experimental data. The catalysts were characterized using XRD, Laser Raman spectroscopy and in situ DRIFT. The support and the calcined fresh catalysts exhibited a mixture of lanthanum phases. However, the only crystalline phase remaining after 100 h on stream was II- La2O2CO3. In situ DRIFT spectra of carbon dioxide adsorption indicated that rhodium favored the oxycarbonate formation. These phases played an important role in the reaction mechanism.