Effects of polyvinyl-pyrrolidone in a polyol method on preparation of a perovskite-type catalyst for steam-CO2 reforming of methane

• La0.8Sr0.2NiO3 perovskite-type catalyst was developed for SCR in a GTL-FPSO.
• Perovskite catalyst was prepared by a polyol method with varying PVP concentration.
• Perovskite catalyst was characterized using XRD, H2-TPR, FT-IR, SEM, and TGA.
• Maximal CH4 and CO2 conversions were achieved when 1 M PVP was used.
• Carbon deposition was 0.3–0.4% on the perovskite-type catalyst.

A La0.8Sr0.2NiO3 perovskite-type catalyst was investigated to develop a stable catalyst for methane steam-CO2 reforming (SCR) in a gas to liquid-floating production storage and offloading process. The perovskite-type catalyst, supported on α-Al2O3, was prepared by a polyol method. The effect of the concentration of polyvinyl-pyrrolidone (PVP) on its reducibility, structural properties, and prevention of carbon deposition was characterized by X-ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR), Fourier transform infrared spectrometry (FT-IR), scanning electron microscope (SEM), and thermogravimetric analysis (TGA). We also conducted methane SCR using the catalysts. At 1 M PVP, the perovskite structure was established completely without impurities; thus, it demonstrated the highest catalytic activity, 73.3% and 46.9% for CH4 and CO2 conversions, respectively. After the reaction, the weight fraction of carbon deposition on the perovskite catalyst was 0.3–0.4% and 1.9% on the Ni catalyst, which indicates that the perovskite-type catalyst superiorly suppresses carbon deposition during methane SCR.

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