Detailed kinetic mechanism for the hydrogen production via the oxidative reforming of ethanol

Ethanol is increasingly growing as feedstock for syngas production. In this work, a detailed kinetic mechanism for the oxidative steam reforming (OSR) of ethanol over a Pt-Ni/CeO2-SiO2 catalyst has been compared against experimental data and apparent kinetics. The rate of production and sensitivity analyses were performed to identify reaction paths, species, and reactions having a significant impact on the distribution of the products. The results have demonstrated that the formation of CH3CHO, which leads to the CH3 and CO, is due to the hydrogen abstraction forming the CH3CHOH, whereas the formation of C2H4, which leads to HCO, CH3, and coke precursors, is related to the pathways forming CH2CH2OH. The production of CH2CH2OH is successfully hindered by the presence of catalysts, giving a phenomenological reason for the suppression in coke formation. This analysis provides theoretical insights into the kinetic aspects of OSR, aiming at the development of optimized catalysts. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

The study compared the detailed kinetic mechanism of oxidative steam reforming of ethanol on a Pt-Ni/CeO2-SiO2 catalyst against experimental data, revealing the impact of different reaction pathways on product distribution. Production rate and sensitivity analyses were conducted to identify the pathways affected by the presence of catalysts.