Thermodynamic and mechanism study of syngas production via integration of nitrous oxide decomposition and methane partial oxidation in the presence of 10%NiO–La0.3Sr0.7Co0.7Fe0.3O3−δ

Abstract

10%NiO–La0.3Sr0.7Co0.7Fe0.3O3−δ (10%NiO-LSCF3773) was synthesized using the EDTAcitrate complexing method. Non-catalytic and catalytic nitrous oxide decomposition and methane partial oxidation using 10%NiO–LSCF3773 was experimentally studied, assuming that the reactions occurred separately in a membrane reactor at feed side and permeate side. The experimental results are in good agreement with the chemical equilibrium composition calculated using Aspen Plus, and the changes of standard Gibbs free energy of each relevant elementary reactions. The mechanism of the reactions was proposed to follow Eley–Rideal surface reaction. The optimal temperature was 800 °C, under atmospheric pressure, where (1) NO2 formation was not detected (2) no production of C2 + and C3 + (3) complete conversion of N2O, CH4 and O2 were achieved (4) high purity syngas was obtained with no significant amount of undesired products and (5) readily utilizable syngas at the ratio of two was achieved.