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Abdel Fattah, M., Hassan, S., Abdel Naby, A., AbdelDayem, H. (2022). Modifications in the kinetics of transesterification of sunflower oil over strontium supported on silica by barium doping. International Journal of Development, 11(1), 27-38. doi: 10.21608/idj.2022.281278
Mona Abdel Fattah; Salah A. Hassan; Abdel Naby M. Abdel Naby; Hany M. AbdelDayem. "Modifications in the kinetics of transesterification of sunflower oil over strontium supported on silica by barium doping". International Journal of Development, 11, 1, 2022, 27-38. doi: 10.21608/idj.2022.281278
Abdel Fattah, M., Hassan, S., Abdel Naby, A., AbdelDayem, H. (2022). 'Modifications in the kinetics of transesterification of sunflower oil over strontium supported on silica by barium doping', International Journal of Development, 11(1), pp. 27-38. doi: 10.21608/idj.2022.281278
Abdel Fattah, M., Hassan, S., Abdel Naby, A., AbdelDayem, H. Modifications in the kinetics of transesterification of sunflower oil over strontium supported on silica by barium doping. International Journal of Development, 2022; 11(1): 27-38. doi: 10.21608/idj.2022.281278

Modifications in the kinetics of transesterification of sunflower oil over strontium supported on silica by barium doping

Article 3, Volume 11, Issue 1, 2022, Page 27-38  XML PDF (632.05 K)
Document Type: Original Article
DOI: 10.21608/idj.2022.281278
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Authors
Mona Abdel Fattah; Salah A. Hassan; Abdel Naby M. Abdel Naby; Hany M. AbdelDayem*
Chemistry department, Faculty of Science, Ain Shams university 11566 Abbassia, Cairo, Egypt
Abstract
The effect of doping of strontium/silica (Sr40/ Si-Aocta) catalyst by barium on its kinetics of methanol transesterification of sunflower oil (MTSFO) to biodiesel was investigated. The experimental data of MTSFO over Sr40/Si-Aocta appear to be good fit into pseudo first order kinetic mechanism. However, the zero-order rate equation is the best fit model for MTSFO over BaSr40/Si-Aocta, compared with the pseudo-first order and second-order rate kinetic models. On the other hand, the intraparticle diffusion kinetics model may also play an important role in the MTSFO over BaSr40/Si-Aocta. In addition, a significant change was observed in Arrhenius activation energy of MTSFO over Sr40/Si-Aocta when it dopped by Ba. Where, Arrhenius activation energy values were found to be 16.6 and 49.6 kJ mol-1 for Sr40/Si-Aocta and BaSr40/Si-Aocta , respectively. These results can be suggested that addition of Ba toSr40/Si-Aocta can enhance its catalytic performance in selective MTSFO.
 
Keywords
Transesterification; biodiesel; kinetics; strontium; barium; catalysts
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