Elsevier

Journal of Cleaner Production

A cleaner process for biodiesel production from waste cooking oil using waste materials equally a heterogeneous goad and its kinetic report

Highlights

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Using heterogeneous catalysts for biodiesel production reduces the separation cost.

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CaO/SiO2 was prepared from wastes of eggshell and peat dirt.

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CaO/SiO2 stands as a promising goad employed for biodiesel production from WCO.

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The reaction mechanism was proposed based on characterization results.

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The kinetic report was successfully derived to confirm the machinery.

Abstract

Utilization of heterogeneous catalyst in the biodiesel production process tin minimize the cost of separation process and subsequently reduce the biodiesel price. This study aims at developing a depression-priced heterogeneous catalyst CaO/SiOtwo prepared from cheap and abundant wastes of eggshell and peat clay for the production of biodiesel from wasted cooking oil. CaO catalyst was capable to produce biodiesel with the yield of 78%. The presence of silica as a support generated from waste product of peat clay improved the biodiesel yield to 91%. The optimum reaction time was threescore min and the biodiesel yield increased with temperature. A reaction machinery during transesterification process was proposed based upon the characterization assay. The mechanism suggested that the silica contributed in the esterification reaction and the CaO played a positive role in biodiesel production via transesterification. The kinetic written report confirmed the proposed mechanism. The pre-exponential cistron (A) and activation energy (Ea) were 5.44 × 10eight min−1 and 66.27 kJ/mol. The proposed reaction mechanism and kinetic study lead to an essential pace of biodiesel product for further research development or application at a larger scale.

Keywords

Biodiesel

Catalyst

Kinetic report

Mechanism

Eggshell

Peat clay

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