Optimization of the Sono-Biodiesel in the Attendance of ZnO Nanoparticles, Process Yield Enhancement: Box Behnken Design

Document Type : Research Paper

Authors

Department of Chemical Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran

Abstract

The growing fuel demands and drastic restrictions of politics on greenhouse gases emissions are motivating towards bioenergy research. In this paper, the yield improvement of the produced biodiesel from canola oil using transesterification process, in attendance of ZnO nanocatalyst and ultrasound waves, was investigated. The crystal size, morphology, and particle size of the prepared nanoparticles were recognized applying X-ray diffraction (XRD), scanning electron microscopy (SEM) and transverse electron microscopy (TEM) analyses, respectively. The size of ZnO nanoparticles was 45 nm with a hexagonal-shaped structure. The response surface methodology (RSM) and the Box Behnken design (BBD) were employed to analyze the impact of the independent variables on biodiesel production yield. The reliability of the proposed model was verified by applying the analysis of variance (ANOVA) with the objective of evaluating response. Regarding the yield, satisfactory accordance was obtained between the calculated and prognosticated data from RSM, with R2= 0.9910 and R2 adj= 0.9748. The optimum reaction conditions were acquired at methanol to oil molar ratio of 11.19:1 mol: mol, ultrasound irradiation time of 31.98 min, and nanocatalyst amount of 3.17 wt.%. The optimum value for the sono-biodiesel yield was achieved equal to 90.16%. Moreover, the kinetic study exhibited that the values of activation energy and Arnius frequency factor were achieved 46.23 kJ mol-1 and 5.83× 105 min-1, respectively. Accordingly, this research indicated that ZnO nanoparticles can be utilized as a promising and efficient heterogeneous catalyst for biodiesel production.

Keywords


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Volume 56, Issue 1
June 2022
Pages 1-14
  • Receive Date: 07 September 2021
  • Revise Date: 02 November 2021
  • Accept Date: 03 November 2021
  • First Publish Date: 01 January 2022