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Open AccessFeature PaperArticle

Zirconium Phosphate Heterostructures as Catalyst Support in Hydrodeoxygenation Reactions

Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain
Authors to whom correspondence should be addressed.
Academic Editor: Monica Pica
Catalysts 2017, 7(6), 176;
Received: 30 April 2017 / Revised: 23 May 2017 / Accepted: 27 May 2017 / Published: 2 June 2017
(This article belongs to the Special Issue Zirconium Phosphate Catalysts)
A porous phosphate heterostructure (PPHs) formed by a layered zirconium(IV) phosphate expanded with silica galleries was prepared presenting a P/Zr molar ratio equal to 2 and a (Si + Zr)/P ratio equal to 3. This pillared zirconium phosphate heterostructure was used as a catalyst support for bi-functional catalysts based on noble metals (Pt or Pd) and molybdenum oxide containing a total metallic loading of 2 wt % and Pt(Pd)/Mo molar ratio equal to 1. The catalysts prepared were characterized by different experimental techniques and evaluated in the hydrodeoxygenation (HDO) reaction of dibenzofuran (DBF) as a model compound present in biomass derived bio-oil, at different reaction pressures. The catalyst characterization evidenced that a high dispersion of the active phase can be achieved by using these materials, as observed from transmission electron microscopy (TEM) characterization, where the presence of small particles in the nanometric scale is noticeable. Moreover, the textural and acidic properties of the phosphate heterostructure are barely affected by the incorporation of metals into its structure. Characterization results evidenced that the presented material is a good candidate to be used as a material support. In both cases, high conversions and high selectivities to deoxygenated compounds were achieved and the active phase played an important role. Thus, Pt/Mo presented a better hydrogenolysis capability, being more selective to O-free products; whereas, Pd/Mo showed a greater hydrogenation ability being more affected by changes in pressure conditions. View Full-Text
Keywords: hydrodeoxygenation (HDO); dibenzofuran; noble metals; molybdenum; pillared zirconium phosphate heterostructures hydrodeoxygenation (HDO); dibenzofuran; noble metals; molybdenum; pillared zirconium phosphate heterostructures
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Ballesteros-Plata, D.; Infantes-Molina, A.; Rodríguez-Aguado, E.; Braos-García, P.; Jiménez-Jiménez, J.; Rodríguez-Castellón, E. Zirconium Phosphate Heterostructures as Catalyst Support in Hydrodeoxygenation Reactions. Catalysts 2017, 7, 176.

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