Experimental Study on LaFeO3/Nb2O5 Oxygen Carrier in Chemical-Looping Partial Oxidation of Methane

Chemical-looping partial oxidation of methane is a green technology. The iron-based material has good oxygen storage capacity and sintering resistance. LaFeO3 is a perovskite catalyst, which has good selectivity and structural stability in the process of methane conversion to syngas. Nb is carbon resistant and can produce more oxygen vacancies. Therefore, in this study, LaFeO3 was modified with Nb2O5 and tested the partial oxidation ability of LaFeO3/Nb2O5 oxygen carrier. Thermodynamic calculation was carried out by FactSage 8.1. At 900 degrees C, the calculation results showed that: methane conversion rate was 100%, CO selectivity was 95.6%, H-2 selectivity was 95.9%, no carbon deposition, and H-2/CO ratio was 2. At 900 degrees C, the experimental results showed that: the conversion rate of methane was 90.4%, H-2 selectivity was 86%, CO selectivity was 79%, and H-2/CO2 ratio was 2.18.