Glucose–Carbon Hybrids as Pt Catalyst Supports for the Continuous Furfural Hydroconversion in Gas Phase
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AuthorMorales Torres, Sergio; Pastrana Martínez, Luisa María; Pérez García, Juan A.; Maldonado Hodar, Francisco José
Active carbonCarbon nanotubesDeactivationDecarbonylationFuranFurfuralFurfuryl alcoholGlucoseHydroconversionPt-catalysts
Morales-Torres, S.; Pastrana-Martínez, L.M.; Pérez-García, J.A.; Maldonado-Hódar, F.J. Glucose–Carbon Hybrids as Pt Catalyst Supports for the Continuous Furfural Hydroconversion in Gas Phase. Catalysts 2021, 11, 49. https://doi.org/10.3390/catal11010049
SponsorshipSpanish Project - ERDF/Ministry of Science, Innovation and Universities-State Research Agency RTI 2018-099224-B100
Glucose–carbon hybrids were synthetized with different carbon materials, namely carbon nanotubes, reduced graphene oxide, carbon black and activated carbon by a hydrothermal treatment. These carbon hybrids were used as Pt-supports (1 wt.%) for the furfural (FUR) hydroconversion in the gas phase at mild operating conditions (i.e., P = 1 atm and T = 200 ◦C). The physicochemical properties (porosity, surface chemistry, Pt-dispersion, etc.) were analyzed by different techniques. Glucose– carbon hybrids presented apparent surface areas between 470–500 m2 g −1 , a neutral character and a good distribution of small Pt-nanoparticles, some large ones with octahedral geometry being also formed. Catalytic results showed two main reaction pathways: (i) FUR hydrogenation to furfuryl alcohol (FOL), and (ii) decarbonylation to furane (FU). The products distribution depended on the reaction temperature, FOL or FU being mainly produced at low (120–140 ◦C) or high temperatures (170–200 ◦C), respectively. At intermediate temperatures, tetrahydrofurfuryl alcohol was formed by secondary FOL hydrogenation. FUR hydroconversion is a structure-sensitive reaction, roundedshape Pt-nanoparticles producing FU, while large octahedral Pt-particles favor the formation of FOL. Pt-catalysts supported on glucose–carbon hybrids presented a better catalytic performance at low temperature than the catalyst prepared on reference material, no catalyst deactivation being identified after several hours on stream.