3 documents found, page 1 of 1
Valorization of Waste Cooking Oil into Biodiesel over an Anionic Resin as Catalyst
Castanheiro, J; Rosa, H; Tropecêlo, A; Caetano, CWaste cooking oil was converted with methanol into biodiesel over a basic resin (Amberlite IRA96) as catalyst, at 60°C. In order to optimize the reaction conditions, different parameters, such as catalyst loading, temperature, nature of alcohol, molar ratio of waste cooking oil to methanol, and amount of initial free fatty acid, were studied. The catalyst was reused and recycled with negligible loss in the acti...
Valorization of Waste Cooking Oil into Biodiesel over Heteropolyacids Immobiliz...
Castanheiro, J; Caiado, M; Tropecêlo, ABiodiesel production from WCO with methanol was carried out over tungstophosphoric acid immobilized on SBA-15 by grafting technique, at 60°C. After PW immobilization, the morphology of the support remained. In order to optimize the conditions, the influence of various reaction parameters, the nature of alcohol and the amount of initial free fatty acid on the transesterification of WCO in the presence of PW-NH2-...
Esterification of free fatty acids to biodiesel over heteropolyacids immobilize...
Tropecêlo, A; Casimiro, M; Fonseca, I; Ramos, A; Vital, J; Castanheiro, JoseTungstophosphoric acid (PW), molybdophosphoric acid (PMo) and tungstosilicic acid (SiW) immobilized on SBA-15 were used, as catalysts, in the esterification of palmitic acid with methanol, at 60 ◦C. Catalysts were characterized by N2 adsorption, FTIR, X-ray diffraction, ICP-AES and TEM. All catalysts exhibited high catalytic activity in palmitic acid esterification with methanol. It was observed that the cataly...