Kinetic study on the thermal degradation of heavy oil in presence of SBA-15 containing aluminum and cerium

• Published in: Petroleum science and technology 2017-07, Vol.35 (13), p.1396-1402
• Main Authors: de Araújo, Larissa Cicianny Luz Ferreira, de Moura Dantas, Taisa Cristine, de Morais Araújo, Aruzza Mabel, Gondim, Amanda Duarte, Fernandes Júnior, Valter José, de Araújo, Antonio Souza
• Format: Article
• Language: English
• Subjects: Aluminum; catalysis; Catalysts; Catalytic activity; Cerium; Chemical synthesis; Electron micrographs; Fourier transforms; heavy oil; Infrared analysis; kinetic model; Kinetics; mesoporous materials; Photomicrographs; Thermal analysis; Thermal degradation; Thermogravimetry
• ISSN: 1091-6466; 1532-2459
• DOI: 10.1080/10916466.2017.1334061

In research for materials that can be applied in processing heavy oil (petroleum), this work proposes to synthesize mesoporous heterogeneous catalysts, type SBA-15, with the addition of cerium metal and aluminum. These catalysts were characterized by X-ray diffraction, scanning electron micrographs coupled to energy dispersive spectrometry, spectroscopy in the infrared region by Fourier transform, N 2 adsorption and desorption and thermal analysis-thermogravimetry. Thermal tests were performed to evaluate the thermal and catalytic degradation process with a sample of heavy oil (°API = 14). Through the non-isothermal kinetic model of Ozawa Flynn Wall (OFW) some parameters for determining the apparent activation energy of decomposition were obtained. The petroleum with 12% of Ce 5 Al 50 SBA-15 showed a catalytic activity for this material. It has been seen that there was a decrease in the Ea in model free of the order from 89.0 to 104.9 kJ mol −1 in α = 50% ± 10%, and it was repeated from the first percentage until the last showing performance of Ce 5 Al 50 SBA-15 as a catalyst.