doi:10.1016/j.apcatb.2020.119598engRaso, R.García, L.Ruiz, J.Oliva, M.Arauzo, J.Aqueous phase hydrogenolysis of glycerol over Ni/Al-Fe catalysts without external hydrogen additionART-2021-120458The present work studied the aqueous phase hydrogenolysis (APH) of glycerol (a by-product of biodiesel manufacturing) without external hydrogen addition to produce value-added products. A series of catalysts based on 28 molar % of Ni were prepared through co-precipitation by changing the Al/Fe molar ratio. The calcined and used catalysts were characterized by several techniques (ICP-OES, N2-physisorption, XRD, H2-TPR, NH3-TPD, FESEM and STEM). This work examines the effects of the molar ratio of Al/Fe on the physicochemical characteristics of Ni/Al-Fe catalysts and during the APH of glycerol. All the catalysts showed low carbon yields to gases and high carbon yields to liquid products, mainly 1, 2-propanediol, acetol and ethylene glycol. Ni/Al3Fe1 catalyst gave the best performance in the APH of glycerol: the highest glycerol conversion (42.31 %), carbon yield to gases (6.57 %) and carbon yield to liquids (30.45%). 1, 2-propanediol was the liquid product with the highest carbon selectivity (70.89%).2021http://zaguan.unizar.es/record/13031010.1016/j.apcatb.2020.119598http://zaguan.unizar.es/record/130310oai:zaguan.unizar.es:130310info:eu-repo/grantAgreement/ES/AEI-FEDER/CTQ2017-86893-Rinfo:eu-repo/grantAgreement/ES/DGA-FEDER/T22-20RAPPLIED CATALYSIS B-ENVIRONMENTAL 283 (2021), 119598 [pp. 1-14]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess