Enhanced biodiesel production from Annona squamosa seed oil using Ni-doped CaO nanocatalyst: Process optimization and reaction kinetics

Energy & Environment Pub Date : 2024-03-28 DOI:10.1177/0958305x241241291

G. Baskar, Sampath Nithica, R. Pravin, Viswanathan Renuka, Krishnamurthi Tamilarasan

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Abstract

The present research was mainly focused on the production of biodiesel from Annona squamosa oil using a synthesized Ni-doped CaO nanocatalyst. The optimization of the transesterification reaction parameters was studied through response surface methodology. The highest biodiesel yield of 99.1% was achieved with the optimized conditions of 7.86% catalyst concentration, 442 RPM, 15.19:1 molar ratio of methanol to oil, reaction temperature of 55.8°C and reaction time of 63.3 min. The results obtained from reaction kinetics study showed a good fit with a first-order kinetic model. The activation energy and R2 value were determined to be 53.7 kJ/mol and 0.90, respectively. The synthesized Ni-doped CaO nanocatalyst was characterized using Scanning Electron Microscope with Energy Dispersive X-ray Spectroscopy which confirms the presence of nickel, calcium and oxygen. Also, the average size of the nanocatalyst was found to be 48.79 nm. The Fourier Transform–Infrared Spectroscopy results showed the occurrence of functional groups such as C-H and C = O bonds in the synthesized Ni-doped CaO nanocatalyst. The presence of fatty acid methyl esters in the produced biodiesel was analyzed through Gas Chromatography-Mass Spectrometry analysis. The obtained results from the current study provides the possibility and insights for sustainable biodiesel production and a greener environment.

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使用掺杂镍的 CaO 纳米催化剂提高葵花籽油生产生物柴油的能力：工艺优化和反应动力学

本研究主要侧重于利用合成的掺镍 CaO 纳米催化剂从葵花籽油中生产生物柴油。通过响应面方法研究了酯交换反应参数的优化。在催化剂浓度为 7.86%、转速为 442 转/分、甲醇与油的摩尔比为 15.19:1、反应温度为 55.8°C、反应时间为 63.3 分钟的优化条件下，生物柴油的产量最高，达到 99.1%。反应动力学研究结果表明，该模型与一阶动力学模型十分吻合。活化能和 R2 值分别为 53.7 kJ/mol 和 0.90。使用扫描电子显微镜和能量色散 X 射线光谱对合成的掺镍 CaO 纳米催化剂进行了表征，结果表明其中含有镍、钙和氧。此外，还发现纳米催化剂的平均尺寸为 48.79 纳米。傅立叶变换红外光谱分析结果表明，在合成的掺镍 CaO 纳米催化剂中存在 C-H 键和 C = O 键等官能团。通过气相色谱-质谱联用分析法分析了生成的生物柴油中脂肪酸甲酯的存在。本研究的结果为生物柴油的可持续生产和绿色环境提供了可能性和启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Energy & Environment

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