Catalysts Ni/Mg1−xCex4+O and Ni,Pd,Pt/Mg1−xCex4+O were developed using the co-precipitation–impregnation methods. Catalyst characterization took place using XRD, H2-TPR, XRF, XPS, Brunauer–Emmett–Teller (BET), TGA, TEM, and FE-SEM. Testing the catalysts for the dry reforming of CH4 took place at temperatures of 700–900°C. Findings from this study revealed a higher CH4 and CO2 conversion using the tri-metallic Ni,Pd,Pt/Mg1−xCex4+O catalyst in comparison with Ni monometallic systems in the whole temperature ranges. The catalyst Ni,Pd,Pt/Mg0.85Ce4+0.15O also reported an elevated activity level (CH4; 78%, and CO2; 90%) and outstanding stability. Following 200 hours under an oxygen stream, carbon deposition on used catalysts was investigated using TEM and temperature programmed oxidation-mass spectroscopy (TPO-MS). The findings of the TEM and TPO-MS analyses revealed that the decreased catalyst had improved anti-coking activity and a lower concentration of platinum and palladium metals. The goal of this study is to investigate the effects of reactant feed ratio, catalyst concentration, prepared catalyst conversion temperature, catalyst efficacy in the DRM process, and the enhancement of methane conversion by passing oxygen gas stream across the reaction.
Author (s) Details
Faris A. J. Al-Doghachi
Department of Chemistry, Faculty of Science, University of Basrah, Basrah 61004, Iraq.
Ali F. A. Jassim
Department of Chemical Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor 40000, Malaysia.
Yun Hin Taufiq-Yap
Faculty of Science and Natural Resources, University Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia and Catalysis Science and Technology Research Centre, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor 40000, Malaysia.
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