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A new type of Ni-based catalyst, using geopolymer as support was prepared and characterized using scanning electron microscopy (SEM), temperature programmed reduction (TPR), N₂ adsorption–desorption, nuclear magnetic resonance (NMR) and transmission electron microscopy (TEM).

The catalytic performance of Ni-geopolymer catalyst was investigated in steam reforming (SR), partial oxidation (POX) and autothermal steam reforming (ATR) of ethanol to syngas, at the temperature of 700 °C. The gaseous mixture flow was adjusted (in terms of molar ratio) for each of the three reactions: steam reforming, steam to carbon (S/C) = 2.5; partial oxidation, oxygen/carbon (O/C) = 0.5; and autothermal reforming, S/C = 2.5 and (O/C) = 0.5.

Ni species supported on the geopolymer surface resulted to be highly active, with a complete ethanol conversion and with the largest amount of hydrogen (∼70 mol%) being …