Journal
BIORESOURCE TECHNOLOGY
Volume 328, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.124831
Keywords
Biodiesel; Heterogeneous catalyst; Optimization and kinetic studies; Reusability
Funding
- National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, Pakistan
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A novel Na-SiO2@TiO2 heterogeneous base catalyst was successfully used for transesterification of waste cooking oil, achieving a high biodiesel yield. The catalyst showed good catalytic activity and reusability in consecutive runs. Kinetic and thermodynamic studies provided valuable insights into the reaction mechanism and energy parameters.
The novel Na-SiO2@TiO2 heterogeneous base catalyst was designed and successfully applied to the trans-esterification reaction of waste cooking oil for sustainable biodiesel production. The designed catalyst was characterized by SEM, XPS, FT-IR and BET before treatment, illustrated its suitability for the catalytic transesterification reaction. Moreover, the influence of reaction temperature, time, catalyst concentration and WCO: MeOH molar ratio on the catalytic activity were also investigated, resultant 98% biodiesel yield was achieved. The reusability test demonstrated that the Na-SiO2@TiO2 catalyst has noticeable catalytic potency up to 5 successive runs. Besides, the kinetics study explains that the reaction is kinetically controlled by pseudo 1st order. The Ea was found to be 21.65 kJ/mol. Similarly, the important thermodynamic parameters such as Delta H-#, Delta S-# and Delta G(#) were estimated to be 18.52 kJ.mol(-1), -219.17 J.mol 1K(-1) and 92.59 kJ.mol(-1) respectively.
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