2026-06-02T21:42:39Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/325242026-02-03T11:07:23Zcom_10630_2254col_10630_37953

Highly Active Nickel (II) Oxide-Supported Cerium Oxide Catalysts for Valorization of Glycerol into Oxygenated Fuel Additives. Appaturi, Jimmy Nelson Maireles-Torres, Pedro Jesús Alomar, Taghrid S. AlMasoud, Najla El-Bahy, Zeinhom M. Tau Chuan, Ling Ng, Eng-Poh Catalizadores Energía de la biomasa Carburantes Acetylation of glycerol to yield monoacetin (MAT), diacetin (DAT), and triacetin (TAT) over NiO-supported CeO2 (xNiO/CeO2) catalysts is reported. The catalysts were synthesized utilizing a sol-gel technique, whereby different quantities of NiO (x = 9, 27, and 45 wt%) were supported onto the CeO2 substrate, and hexadecyltrimethylammonium bromide (CTABr) served as a porogen. The utilization of EDX elemental mapping analysis confirmed the existence of evenly distributed Ni2+ ion and octahedral NiO nanoparticles on the CeO2 surface through the DRS UV-Vis spectroscopy. The most active catalyst is 27NiO/CeO2 based on TAT selectivity in the glycerol acetylation with ethanoic acid, attaining 97.6% glycerol conversion with 70.5% selectivity to TAT at 170 C with a 1:10 glycerol/ethanoic acid molar ratio for 30 min using a non-microwave instant heating reactor. The 27NiO/CeO2 is reusable without significant decline in catalytic performance after ten consecutive reaction cycles, indicating high structure stability with accessible active acidity. 2024-09-11T10:20:00Z 2024-09-11T10:20:00Z 2023-06-29 journal article Appaturi, J.N.; Maireles-Torres, P.; Alomar, T.S.; AlMasoud, N.; El-Bahy, Z.M.; Ling, T.C.; Ng, E.-P. Highly Active Nickel (II) Oxide-Supported Cerium Oxide Catalysts for Valorization of Glycerol into Oxygenated Fuel Additives. Materials 2023, 16, 4713. https:// doi.org/10.3390/ma16134713 https://hdl.handle.net/10630/32524 10.3390/ma16134713 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI