Three Rh supported catalysts (Rh/SiO2, Rh/La2O3-SiO2, Rh/La2O3) have been investigated by catalytic tests in the dry reforming reaction (CO2+CH4--> 2CO+2H(2)). The La2O3 shows a positive effect on the conversion and selectivity due to the CO2 activation. The results lead to the supposition of a deep influence of the CH4 partial pressure on the CO2 conversion. The mechanism should involve the reaction of carbon dioxide on the support with methane adsorbed on the metal. Thermogravimetric analyses put in evidence the role of metal and seem to confirm a concerted reaction scheme in which carbon deposition and CO2 conversion simultaneously occurr.
Carbon dioxide reaction with methane on La2O3 supported Rh catalysts
GRONCHI, PAOLO;MAZZOCCHIA, CARLO VITTORIO;DEL ROSSO, RENATO
1995-01-01
Abstract
Three Rh supported catalysts (Rh/SiO2, Rh/La2O3-SiO2, Rh/La2O3) have been investigated by catalytic tests in the dry reforming reaction (CO2+CH4--> 2CO+2H(2)). The La2O3 shows a positive effect on the conversion and selectivity due to the CO2 activation. The results lead to the supposition of a deep influence of the CH4 partial pressure on the CO2 conversion. The mechanism should involve the reaction of carbon dioxide on the support with methane adsorbed on the metal. Thermogravimetric analyses put in evidence the role of metal and seem to confirm a concerted reaction scheme in which carbon deposition and CO2 conversion simultaneously occurr.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
