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<p>The components of landfill gas are the main atmospheric warming contributors cause environmental concerns. Dry reforming of methane (DRM) is considered to be an effective way to convert landfill gas, but a high-performance catalyst is required. A series of Pt-doped Ni-based hydrotalcite-derived catalysts were prepared by a co-precipitation method followed by supercritical deposition technology. The catalytic performance of the as-prepared catalysts was evaluated, exhibiting the following activity trend: Ni10Pt0.2-HT &gt; Ni10Pt0.1-HT &gt; Ni10Pt0.5-HT &gt; Ni10-HT. Analysis techniques including XRD, BET, H<sub>2</sub>-TPR, TG/DSC, etc demonstrated that Pt/Ni ratio played a crucial role in the transformation of Ni species, resulting in reduced stability of Ni-Mg-Al mixed oxide and an increase in NiO<sub>x</sub> with higher Pt ratios. Moreover, an increase in Pt ratio converted inert carbon deposition to active carbon deposition, which improved catalyst stability. The present work proposes a strategy to synthesize an active, stable CH<sub>4</sub>-reforming catalyst with the potential for landfill gas utilization.</p> Graphical Abstract <p></p>

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Synthesis gas production from landfill gas using a Pt-doped Ni-based hydrotalcite-derived catalyst

  • 期刊论文

  • 发表日期：

    2025年6月18日

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  • Lin Chen,
  • Wang Wu,
  • Qingyu Huang,
  • Duchao Zhang,
  • Weifeng Liu

摘要

The components of landfill gas are the main atmospheric warming contributors cause environmental concerns. Dry reforming of methane (DRM) is considered to be an effective way to convert landfill gas, but a high-performance catalyst is required. A series of Pt-doped Ni-based hydrotalcite-derived catalysts were prepared by a co-precipitation method followed by supercritical deposition technology. The catalytic performance of the as-prepared catalysts was evaluated, exhibiting the following activity trend: Ni10Pt0.2-HT > Ni10Pt0.1-HT > Ni10Pt0.5-HT > Ni10-HT. Analysis techniques including XRD, BET, H2-TPR, TG/DSC, etc demonstrated that Pt/Ni ratio played a crucial role in the transformation of Ni species, resulting in reduced stability of Ni-Mg-Al mixed oxide and an increase in NiOx with higher Pt ratios. Moreover, an increase in Pt ratio converted inert carbon deposition to active carbon deposition, which improved catalyst stability. The present work proposes a strategy to synthesize an active, stable CH4-reforming catalyst with the potential for landfill gas utilization.

Graphical Abstract