Stabilizing Ni catalysts in biogas reforming via In-Situ carbon deposit removal by CeO2 oxygen vacancies

Abstract

Ni-based catalysts face significant challenges of carbon deposition during biogas reforming to syngas. Herein, we propose leveraging the in-situ consumption of carbon deposits generated during biogas reforming through oxygen vacancies (Ov) on the surface of CeO2, ensuring enhanced activity and stability of Ni3Fe/CeO2-RS catalyst. The catalyst exhibits an initial CH4 conversion of 80.4% and a CO2 conversion of 97.2%, with a mere 3.9% decline in CO2 conversion after 720 min.