Magnesium promoted hydrocalumite derived nickel catalysts for ethanol steam reforming

Hydrocalumite derived nickel (Ni) catalysts with different loading of magnesium (Mg) (7.5/ 10/15 wt%, as promoters) were for the first time prepared and tested for ethanol steam reforming (ESR) in this work. The catalytic performances of different Mg promoted cata-lysts were mainly evaluated in the temperature range between 550 and 700 degrees C as deter-mined by thermodynamic simulation. Experimental results showed that the optimal reaction temperature was 650 degrees C in terms of the hydrogen yields for these ESR catalysts, especially for 15Ni7.5Mg/HCa which presented a remarkable catalytic performance. Its hydrogen yields reached 90% while ethanol was almost fully converted at 650 degrees C. Based on the characterization results, it's believed that 15Ni7.5Mg/HCa with a certain amount of Mg loading can get the smallest Ni0 crystallite sizes, better H2 reducibility and suitable basic-ities on strong basic sites. The catalytic performances of ESR catalysts were mainly related to the Ni0 crystallite size, reducibility and basicity for the prepared hydrocalumites derived Ni catalysts, and 15Ni7.5Mg/HCa could be considered as one of the best catalysts for ESR.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.