Effects of metal loading and support modification on the low-temperature steam reforming of ethanol (LTSRE) over the Ni-Sn/CeO2 catalysts

This article presents the effect of metal loading and support modification with MgO on lowtemperature steam reforming of ethanol (LTSRE) over Ni-Sn/CeO2 catalysts prepare by a study of these catalysts (0.5 g) is performed at different temperatures (200-400 degrees C), H2O:EtOH = 12: 1 mol ratio, and feed flow rate 0.1 ml/min. After 10 h TOS at 400 degrees C, NiSn(5)/ CM12 catalyst with 5 wt.% total metal loading, optimal Sn (Ni:Sn = 14:1), and Ce:Mg = 1:2 mol ratio shows EtOH conversion 100% and H2 selectivity 70% with low coke deposition. Physicochemical characterizations (XRD, Raman, FESEM, TEM, and N2 adsorption-desorption) reveal that addition of MgO in CeO2 and an optimal amount of Sn decrease both Ni and support particle sizes while oxygen storage capacity (OSC) of the support increases (by XPS). Alkaline characteristics of MgO reduces support's acidity and improves active metal-support interaction, as evaluated by NH3-TPD and H2-TPR. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.