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Response surface optimization of biodiesel synthesis over a novel biochar-based heterogeneous catalyst from cultivated (Musa sapientum) banana peels

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ARTICLE DOWNLOAD

Response surface optimization of biodiesel synthesis over a novel biochar-based heterogeneous catalyst from cultivated (Musa sapientum) banana peels

10$

Jakkrapong Jitjamnong, Chachchaya Thunyaratchatanon, Apanee Luengnaruemitchai, Napaphat Kongrit, Naparat Kasetsomboon, Arrisa Sopajarn, Narinphop Chuaykarn & Nonlapan Khantikulanon 

Abstract

In this work, response surface methodology (RSM) was utilized to optimize the biodiesel yield of the transesterification reaction. A novel solid carbon-supported potassium hydroxide catalyst derived from the pyrolysis of cultivated banana (Musa sapientum) peels and potassium carbonate (K2CO3) was used as the catalyst for biodiesel production. A five-level (− 2, − 1, 0, + 1, and + 2) RSM with a four-factor central composite design of independent variable factors (methanol to palm oil molar ratio (6:1–18:1), catalyst loading (3–7 wt.%), reaction time (30–150 min), and reaction temperature (50–70 °C)) were randomly setup using the Design of Experiment program. The 30 wt.% K2CO3 catalyst calcined at 600 °C under atmosphere pressure exhibited the highest catalytic activity, since the pyrolysis ash was rich in K that formed a basic heterogeneous catalyst. Within the range of selected operating conditions, the optimized methanol:oil molar ratio, catalyst loading, reaction time, and reaction temperature were found to be 15:1, 4 wt.%, 120 min, and 65 °C, respectively, to give a biodiesel yield of 99.16%. The actual biodiesel yield of 98.91% was obtained under the predicted optimal conditions. The high R2 (96.76%) and R2adj (92.97%) values indicated that the fitted model showed a good agreement with the predicted and actual biodiesel yield.

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Year 2020
Language English
Format PDF
DOI 10.1007/s13399-020-00655-8