In this study, oxidative steam reforming of ethanol at low-temperature was investigated over bimetallic catalysts supported on CeO2/SiO2, having different ceria content (20-40 wt%). The activity was studied between 300 and 600°C, under a 10%C2H5OH/40%H2O/5%O2/45%N2 stream; catalyst stability was evaluated at the same feeding conditions by fixing the temperature to 500°C. The results of catalyst characterization (BET, XRD, TPR) allowed the explanation of the different catalytic performances, in terms of activity and stability. The sample containing 30wt% of ceria displayed the highest durability, assuring total ethanol conversion and a stable behavior for more than 130 h. This result was related to the low dimension of Ni crystallites, which reduced carbon formation rate and improved catalyst resistance towards deactivation.
Coke-resistant pt-ni/ceo2/sio2 catalysts for ethanol reforming
PALMA, Vincenzo;RUOCCO, CONCETTA;MELONI, EUGENIO;RICCA, ANTONIO
2017
Abstract
In this study, oxidative steam reforming of ethanol at low-temperature was investigated over bimetallic catalysts supported on CeO2/SiO2, having different ceria content (20-40 wt%). The activity was studied between 300 and 600°C, under a 10%C2H5OH/40%H2O/5%O2/45%N2 stream; catalyst stability was evaluated at the same feeding conditions by fixing the temperature to 500°C. The results of catalyst characterization (BET, XRD, TPR) allowed the explanation of the different catalytic performances, in terms of activity and stability. The sample containing 30wt% of ceria displayed the highest durability, assuring total ethanol conversion and a stable behavior for more than 130 h. This result was related to the low dimension of Ni crystallites, which reduced carbon formation rate and improved catalyst resistance towards deactivation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
