Lin Chen, Wang Wu, Qingyu Huang, Duchao Zhang, Weifeng Liu
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Synthesis gas production from landfill gas using a Pt-doped Ni-based hydrotalcite-derived catalyst
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.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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