OICC Press International Journal of Energy and Environmental Engineering 2251-6832 8 2 (June 2017) 2017 03 27 Blends of diesel and biodiesel of cooking oil waste and moringa (Moringa oleífera Lam): kinetic and thermal analysis and monitoring during storage 10.1007/s40095-017-0232-x EN Tathilene Bezerra Mota Gomes Arruda Universidade Federal do Ceará-UFC, Fortaleza, CE, 60455-760, BR Manoel Barbosa Dantas Instituto Federal da Paraíba-IFPB, Sousa, PB, 58805-345, BR Kelvin Costa de Araújo Instituto Federal da Paraíba-IFPB, Sousa, PB, 58805-345, BR Francisco Eduardo Arruda Rodrigues Instituto Federal do Ceará-IFCE, Caucaia, CE, 61609-090, BR Nágila Maria Pontes Silva Ricardo Universidade Federal do Ceará-UFC, Fortaleza, CE, 60455-760, BR Samuel Guedes Bitu Instituto Federal da Paraíba-IFPB, Sousa, PB, 58805-345, BR Journal Article 2017 03 27 Abstract This research reports the use of cooking oil waste and moringa biodiesel and their blends into mineral diesel and the influence of the storage conditions. The behavior of the blend between moringa and cooking oil waste and biodiesel were evaluated through thermogravimetric analysis and the data were used in the determination of the kinetic parameters of the blends as activation energy and pre-exponential factor and the values found were similar to reported in literature for others samples of biodiesel. The quality of the blend between biodiesel and diesel and the influence of storage conditions were evaluated through the determination of the acid value of the samples. The acid value for the samples that contained mineral diesel was virtually constant. The acid values of the samples of biodiesel were not in accordance with Brazilian legislation, but did not affect the quality of the blend with mineral diesel. The average values of activation energy for waste cooking oil and moringa biodiesel were 70.04 ± 2.99 and 53.80 ± 6.83 kJ mol −1 , respectively.