Abstract
Operando-SSITKA (Mass spectrometry-DRIFTS) and other isotopic experiments were employed to investigate the steam reforming of acetol on 10-wt% Ni/La₂O₃-Al₂O₃at 500 °C. A large concentration (1 < θ < 18) of active carbonaceous species with H-content of 2785 μmol H g<sup>−1</sup> (H/C > 1) participates in the reaction path of H2 formation, while a significantly larger amount (H-content larger than 1.4 mmol H g<sup>−1</sup>) appeared as inactive species. The nature of the majority of active intermediates comprised of -CH<sub>x</sub> and -C<sub>x</sub>H<sub>y</sub> formed on both the Ni and support phases, and which are associated with a small mean rate constant (kapp = 0.075 min−1) towards H₂(g) formation (D₂O-SSITKA).