Weerachawanasak, Patcharaporn

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Weerachawanasak, Patcharaporn
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patcharaporn.we@kmitl.ac.th

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    Item type:Publication,
    Liquid-Phase Selective Hydrogenation of Furfural to Furfuryl Alcohol over Ferromagnetic Element (Fe, Co, Ni, Nd)-Promoted Pt Catalysts Supported on Activated Carbon
    (2022-04-01)
    Saknaphawuth, Sureeporn
    ;
    Weerachawanasak, Patcharaporn
    ;
    Chuenchom, Laemthong
    ;
    Praserthdam, Piyasan
    ;
    Panpranot, Joongjai
    Ferromagnetic element (x = Fe, Co, Ni, and Nd)-promoted Pt/AC catalysts were prepared by co-impregnation method or physical mixing and tested in the liquid-phase hydrogenation of furfural to furfuryl alcohol (FA) under mild conditions (50<sup>◦</sup>C and 20 bar H<inf>2</inf> ) using water and methanol as the solvent. Among the various catalysts studied, the 0.15FePt/AC exhibited complete conversion of furfural with an FA selectivity of 74% after only 1 h of reaction time in water. The promotional effect of the bimetallic catalysts became less pronounced when methanol was used as the solvent and a 2-furaldehyde dimethyl acetal solvent product was formed. The superior catalyst performances were correlated with the higher Pt dispersion, the presence of low coordination Pt sites, and the strong Pt–Fe interaction as characterized by X-ray diffraction, H<inf>2</inf> temperature-programmed reduction (H<inf>2</inf>-TPR), N<inf>2</inf> physisorption, and infrared spectroscopy of the adsorbed CO (CO-IR). However, to simply use a magnet for catalyst separation, 0.5 wt% Fe was the minimum Fe loading on the Pt/AC. The 0.5FePt/AC still exhibited good magnetic properties after the third consecutive runs.
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    Sustainable Liquid-Phase Selective Hydrogenation of CO2 to C1–C3 Alcohols over Mg-, Zn-, and Pt-Modified Copper Phyllosilicate Catalysts: Insight Reaction Pathways
    (2026-07-27)
    Poson, Suttiporn
    ;
    Teerawatananond, Thapong
    ;
    Shoosri, Tanyarat
    ;
    Miyake, Takanori
    ;
    Panpranot, Joongjai
    The sustainable conversion of carbon dioxide (CO<inf>2</inf>)into value-added chemicals remains a major challenge, particularly for the selective formation of C<inf>1</inf>–C<inf>3</inf> alcohols. Herein, bimetallic copper phyllosilicate catalysts (1%X-20%CuPS, X = Zn, Mg, Pt) were developed and systematically evaluated for the liquid-phase hydrogenation of CO<inf>2</inf> to alcohols compared with monometallic 20%CuPS as a benchmark. Among these catalysts, 1%Mg-20%CuPS exhibited the highest activity, excellent stability, and good reusability, highlighting the beneficial role of earth-abundant metal promotion. The enhanced performance is attributed to increased surface basicity and stronger CO<inf>2</inf> adsorption, which facilitated the formation and stabilization of formate intermediates. Concurrently, in situ reduction of Cu<sup>+</sup>/Cu<sup>0</sup> sites promotes efficient H<inf>2</inf> dissociation and subsequent hydrogenation steps. A high surface Mg/Si ratio further stabilizes CO-derived intermediates and promotes CO-mediated C–C coupling, favoring C<inf>2</inf><inf>+</inf> alcohol formation. Zn incorporation induced similar but less pronounced effects, whereas Pt altered the reaction network, leading to increased byproduct formation and lower alcohol selectivity. After 24 h, the total alcohol selectivity followed the order 1%Mg-20%CuPS (98%) > 1%Zn-20%CuPS (88%) > 1%Pt-20%CuPS (73%) > 20%CuPS (67%). Overall, second metal modification effectively tunes catalyst properties and reaction pathways, with Mg emerging as a sustainable and industrially viable promoter for CO<inf>2</inf> valorization to C<inf>1</inf>–C<inf>3</inf> alcohols.