151216 20251017144639.0 doi 10.1016/j.biombioe.2025.107725 sideral 143032 ART-2025-143032 eng Lete, Alejandro Universidad de Zaragoza (orcid)0000-0002-2866-9035 Effect of calcination temperature and atmosphere on the properties and performance of CuAl catalysts for glycerol dehydration to acetol 2025 Access copy available to the general public Unrestricted A series of CuAl catalysts were prepared by the coprecipitation method. The objective of this study was to investigate the influence of different calcination temperatures (500, 600, and 675 °C) and calcination atmospheres (N2 or air) on the catalysts physicochemical properties and performance in the gas-phase glycerol dehydration to acetol. The catalytic tests were carried out in a fixed bed reactor at 250 °C, atmospheric pressure, and a catalyst weight to glycerol flow rate ratio (W/m) of 30 gCatalyst min gGlycerol−1. The catalysts were characterized by ICP-OES, N2 adsorption-desorption, X-ray diffraction (XRD), H2 temperature programmed reduction (H2-TPR), temperature gravimetric analysis (TGA), and elemental analysis. The characterization results revealed that both calcination temperature and calcination atmosphere influenced the textural and metallic properties. Increasing the calcination temperature lowered the reduction temperature, and decreased the surface area. The calcination atmosphere influenced the surface area and pore diameter, and the N2 atmosphere generated a larger pore diameter. The best catalytic activity was achieved by the CuAl-675-N catalyst calcined at 675 °C in a N2 atmosphere, which produced a glycerol conversion of 99.0 % and an acetol yield of 67.3 %. The superior performance could be attributed to textural properties, the Cu phase, and minimized carbon deposition, establishing it as one efficient catalyst derived from inexpensive and widely available metals. This work proposes an economical and simple technique based on calcination to improve the catalytic activity of Cu-based catalysts. info:eu-repo/grantAgreement/ES/DGA/T22-23R info:eu-repo/grantAgreement/ES/MCINN/PID2020-114985RB-I00 info:eu-repo/semantics/embargoedAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Lacleta, Francisco 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 195 (2025), 107725 [8 pp.] Biomass bioenergy BIOMASS & BIOENERGY 0961-9534 746869 http://zaguan.unizar.es/record/151216/files/texto_completo.pdf Postprint info:eu-repo/date/embargoEnd/2027-04-01 1792852 http://zaguan.unizar.es/record/151216/files/texto_completo.jpg?subformat=icon icon Postprint info:eu-repo/date/embargoEnd/2027-04-01 oai:zaguan.unizar.es:151216 articulos driver 2025-10-17-14:31:09 ARTICLE