000163709 001__ 163709 000163709 005__ 20251030150826.0 000163709 0247_ $$2doi$$a10.1016/j.biombioe.2025.108273 000163709 0248_ $$2sideral$$a145809 000163709 037__ $$aART-2025-145809 000163709 041__ $$aeng 000163709 100__ $$0(orcid)0000-0002-2866-9035$$aLete, Alejandro$$uUniversidad de Zaragoza 000163709 245__ $$aValorization of pure and biodiesel-derived refined crude glycerol to renewable acetol over copper-based catalyst: Effect of operating conditions and catalyst stability 000163709 260__ $$c2025 000163709 5060_ $$aAccess copy available to the general public$$fUnrestricted 000163709 5203_ $$aAcetol is a key intermediate in the aldol condensation of biomass-derived furans, enabling the production of carbon chains within the aviation fuel range. This work proposes glycerol, a biomass-derived by-product from biodiesel production, as a renewable feedstock for acetol production. The catalytic performance of a CuAl catalyst was evaluated in the gas phase dehydration of glycerol, focusing on the influence of temperature (200–300 °C), catalyst weight to glycerol mass flow ratio (10–50 gCatalyst min gGlycerol−1), and carrier gas to liquid ratio (200–600 m3GasSTP m3Liquid−1). Both pure and biodiesel-derived refined crude glycerol were used as feedstock. Long-term stability experiments assessed the evolution of catalytic activity and physicochemical properties over time. A great activity was obtained under conditions of 250 °C, 30 gCatalyst min gGlycerol−1, and 400 m3GasSTP m3Liquid−1 with pure glycerol after a time-on-stream (TOS) of 2 h (95.1 % glycerol conversion and 564 mgAcetol gGlycerol−1). Stability studies provided good catalytic results after a TOS of 52 h using pure glycerol (72 % glycerol conversion and 266 mgAcetol gGlycerol−1) and demonstrated that coke deposition was responsible for catalyst deactivation. The use of refined crude glycerol proved to be highly effective in the first hours of the reaction (98.7 % glycerol conversion and 570 mgAcetol gGlycerol−1 for a TOS of 2 h), however, rapid deactivation was observed due to solids deposition. This catalytic route highlights the feasibility of valorization of biomass residues for producing renewable acetol, a promising precursor for sustainable aviation fuel (SAF). 000163709 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T22-23R$$9info:eu-repo/grantAgreement/ES/MCINN/PID2020-114985RB-I00 000163709 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 000163709 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000163709 700__ $$0(orcid)0000-0001-7115-9025$$aGarcía, Lucía$$uUniversidad de Zaragoza 000163709 700__ $$0(orcid)0000-0002-2924-3095$$aRuiz, Joaquín$$uUniversidad de Zaragoza 000163709 700__ $$0(orcid)0000-0002-5959-3168$$aArauzo, Jesús$$uUniversidad de Zaragoza 000163709 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Ingeniería Química 000163709 773__ $$g203 (2025), 108273 [15 pp.]$$pBiomass bioenergy$$tBIOMASS & BIOENERGY$$x0961-9534 000163709 8564_ $$s5219511$$uhttps://zaguan.unizar.es/record/163709/files/texto_completo.pdf$$yVersión publicada 000163709 8564_ $$s2497915$$uhttps://zaguan.unizar.es/record/163709/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000163709 909CO $$ooai:zaguan.unizar.es:163709$$particulos$$pdriver 000163709 951__ $$a2025-10-30-14:39:25 000163709 980__ $$aARTICLE