Partial Oxidation of Bio-methane over Nickel Supported on MgO–ZrO2 Solid Solutions
نویسندگان
چکیده
Abstract Syngas can be produced from biomethane via Partial Oxidation of Methane (POM), being an attractive route since it is ecofriendly and sustainable. In this work, catalysts Ni supported on MgO–ZrO 2 solid solutions, prepared by a one-step polymerization method, were characterized HRTEM/EDX, XRD, XPS, H -TPR, in situ XRD. All catalysts, including Ni/ZrO Ni/MgO as reference, tested for POM (CH 4 :O molar ratio 2, 750 ºC, 1 atm). NiO/MgO/ZrO contained two solid-solutions, NiO-MgO, revealed XRD XPS. (30 wt%) solution exhibited high methane conversion hydrogen selectivity. However, depending the MgO amount (0, 4, 20, 40, 100 percent) major differences NiO reducibility, growth 0 crystallite size during reduction POM, carbon deposition rates observed. Interestingly, with lower content achieved highest CH (~ 95%), selectivity to (1.7) CO (0.8), low (0.024 g .g cat −1 h ) Ni4MgZr (4 mol% MgO) turning out best catalyst. indicated metallic nanoparticles (average 31 nm), solution, small amounts NiO–MgO present well. The presence also influenced morphology deposits, leading filaments instead amorphous carbon. A combustion-reforming mechanism suggested using support strongly improves catalytic performance, which attributed effective O , activation at Ni/MgO–ZrO interface.
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ژورنال
عنوان ژورنال: Topics in Catalysis
سال: 2023
ISSN: ['1022-5528', '1572-9028']
DOI: https://doi.org/10.1007/s11244-023-01822-7