135769 20260217205548.0 doi 10.1016/j.fuel.2024.132001 sideral 138756 ART-2024-138756 eng Lete, Alejandro Universidad de Zaragoza (orcid)0000-0002-2866-9035 Synthesis of ketones from glycerol and 1,2-propanediol using copper and nickel catalysts: Unraveling the impact of reaction phase and active metal 2024 Access copy available to the general public Unrestricted Catalysts based on nickel-aluminum and copper–aluminum were synthesized through the coprecipitation method with a Ni or Cu content of 28 mol%, expressed as Ni/(Ni + Al) or Cu/(Cu + Al). The catalysts were calcined at 675 °C and thoroughly analyzed using various characterization techniques (ICP-OES, N2 adsorption–desorption, NH3-TPD, CO2-TPD, XRD, H2-TPR and elemental analysis). The samples were tested in two different reaction systems, gas phase at atmospheric pressure and liquid phase at 34 absolute bar, to investigate the production of ketones from glycerol and 1,2-propanediol under reaction conditions of 227 °C and a mass of catalyst/reagent mass flow rate ratio (W/m) of 10 gCatalyst·min/gReagent. The characterization results revealed catalysts with high specific surface area and nickel and copper metallic particles, exhibiting good catalytic activity towards liquid products. Gas phase reactions favored the generation of acetol and carbon deposits, which were minimal in liquid phase reactions. The active metal played a crucial role, and it was demonstrated that copper, with a higher number of acidic sites, exhibited greater selectivity towards ketones than the nickel catalyst. The best performance was achieved by the CuAl catalyst in the gas phase reaction of glycerol, with a conversion of 67.0 ± 4.0 %, a carbon selectivity to acetol in the liquid products of 61.4 % and a yield to acetol of 119.8 mgAcetol/gGlycerol. info:eu-repo/grantAgreement/ES/DGA-FEDER/T22-23R info:eu-repo/grantAgreement/ES/MCINN/PID2020-114985RB-I00 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 7.5 2024 ENGINEERING, CHEMICAL 22 / 176 = 0.125 2024 Q1 T1 ENERGY & FUELS 45 / 182 = 0.247 2024 Q1 T1 1.614 2024 Chemical Engineering (miscellaneous) 2024 Q1 Organic Chemistry 2024 Q1 Fuel Technology 2024 Q1 Energy Engineering and Power Technology 2024 Q1 14.2 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Raso, Raquel (orcid)0000-0001-9626-3726 García, Lucía Universidad de Zaragoza (orcid)0000-0001-7115-9025 Ruiz, Joaquín Universidad de Zaragoza (orcid)0000-0002-2924-3095 Arauzo, Jesús Universidad de Zaragoza (orcid)0000-0002-5959-3168 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 371, Part A (2024), 132001 [15 p.] Fuel Fuel 0016-2361 4378923 http://zaguan.unizar.es/record/135769/files/texto_completo.pdf Versión publicada 2570966 http://zaguan.unizar.es/record/135769/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:135769 articulos driver 2026-02-17-20:39:00 ARTICLE