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<p>This study aims to expand the technological applications of glycerol (Gly) through a sustainable approach for synthesizing Ni/Fe catalysts supported on γ-Al<sub>2</sub>O<sub>3</sub>, using glycerol as a polymerizing agent in a modified Pechini method. The conventional ethylene glycol was replaced with glycerol, followed by impregnation with Ni or Fe (20 wt%) in one or two steps. The catalysts were characterized by X-ray diffraction (XRD), N<sub>2</sub> adsorption-desorption at 77&#xa0;K, temperature-programmed reduction (H<sub>2</sub>-TPR), transmission electron microscopy (TEM), thermogravimetric analysis, and Raman spectroscopy. FTIR confirmed polyesterification, demonstrating glycerol’s effectiveness in producing γ-alumina with surface areas between 43 and 165 m<sup>2</sup> g<sup>− 1</sup>. Catalytic tests for methane decomposition at 550&#xa0;°C showed that two-step synthesized catalysts exhibited superior performance, particularly 2s-Ni<sub>20</sub>/Al<sub>2</sub>O<sub>3</sub>, which achieved 27% methane conversion and produced carbon nanotubes.</p>

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Application of the Modified Pechini Method Through the Addition of Glycerol in the Synthesis of Fe/Al2O3 and Ni/Al2O3 Catalysts for Methane Decomposition

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Nereu Victor Nazário Tenório,
  • Rayssa Jossanea Brasileiro Motta,
  • Simoni Margareti Plentz Meneghetti,
  • Rusiene Monteiro de Almeida

摘要

This study aims to expand the technological applications of glycerol (Gly) through a sustainable approach for synthesizing Ni/Fe catalysts supported on γ-Al2O3, using glycerol as a polymerizing agent in a modified Pechini method. The conventional ethylene glycol was replaced with glycerol, followed by impregnation with Ni or Fe (20 wt%) in one or two steps. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption at 77 K, temperature-programmed reduction (H2-TPR), transmission electron microscopy (TEM), thermogravimetric analysis, and Raman spectroscopy. FTIR confirmed polyesterification, demonstrating glycerol’s effectiveness in producing γ-alumina with surface areas between 43 and 165 m2 g− 1. Catalytic tests for methane decomposition at 550 °C showed that two-step synthesized catalysts exhibited superior performance, particularly 2s-Ni20/Al2O3, which achieved 27% methane conversion and produced carbon nanotubes.