The activity of Ni catalysts supported on SiO2, La2O3-SiO2 and La2O3 oxides were analysed in in the transient period using a single pulse of the pure reagents alone or a pulse of the 1/1 CH4/CO2 gas mixture (single-PSRA). The data have been compared with those obtained using the supports alone. The reduced and the unreduced form of both the species were investigated. The activity depends on the support and on the oxidation degree. The conversion of each reagent is ascribed to a redox mechanism between the metal and the support. The shape of the curve that represents the data of each test and the time of the peak maximum agree with the proposed pathway carbon surface specie.
Transient reactions in CO2 reforming of methane.
GRONCHI, PAOLO;CENTOLA, PAOLO;DEL ROSSO, RENATO
1998-01-01
Abstract
The activity of Ni catalysts supported on SiO2, La2O3-SiO2 and La2O3 oxides were analysed in in the transient period using a single pulse of the pure reagents alone or a pulse of the 1/1 CH4/CO2 gas mixture (single-PSRA). The data have been compared with those obtained using the supports alone. The reduced and the unreduced form of both the species were investigated. The activity depends on the support and on the oxidation degree. The conversion of each reagent is ascribed to a redox mechanism between the metal and the support. The shape of the curve that represents the data of each test and the time of the peak maximum agree with the proposed pathway carbon surface specie.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
