Siti Nor Amira Rosli, Hadi Suyono, Philiphi de Rozari, Febri Odel Nitbani, Sumaiya Zainal Abidin
Bi-reforming of methane (BRM), a synergistic process integrating carbon dioxide (CO2) and steam reforming of methane (CH4), presents a promising route for the valorization of greenhouse gases (CH4 and CO2) into synthesis gases. The current research elucidates the correlation between Ni loading levels and the resulting physicochemical attributes and catalytic behavior of Ni catalyst supported on CeO2 designed for BRM process. This study involved the synthesis of Ni/CeO2 catalysts using ultrasonic-assisted impregnation method with Ni loading range of 5 to 15 wt% and characterized using BET, XRD, FESEM-EDX, ICP-OES, FTIR, CO2-TPD, H2-TPR, and TPO. The catalytic performance of synthesized catalysts was assessed in a fixed bed reactor (WHSV = 36,000 mL/g·h, P = 1 atm, and T = 800 °C) for 8 h. The efficiency of reactant conversion scaled proportionally with Ni content, exhibiting a clear loading-dependent trend in the following sequence: 15 > 10 > 5 wt% Ni/CeO2. Notably, the 15 wt% variant demonstrated excellent BRM catalytic performance, achieving CH4, and CO2 conversion of more than 70%, along with 45% of H2 yield production. In conclusion, the study demonstrated that the Ni contents act as a decisive factor in modulating both chemical behavior and the structural integrity in Ni/CeO2 catalysts during the BRM reaction. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2026.
Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang Al- Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, Pahang, Kuantan, 26300, Malaysia; Department of Electrical Engineering, Faculty of Engineering, Universitas Brawijaya, Jln. MT. Haryono 167, Malang, Indonesia; Faculty of Science and Engineering, Universitas Nusa Cendana, Jl. Adisucipto Penfui, NTT, Kupang, Indonesia; Centre for Sustainable Fluid Energy Research (Fluid Energy), Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, Pahang, Kuantan, 26300, Malaysia; Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, 12 Nguyen Van Bao St, Go Vap, Ho Chi Minh, 70000, Viet Nam
