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

Author

Listed:
  • Gurunathan Baskar
  • Sampath Nithica
  • Ravichandran Pravin
  • Viswanathan Renuka
  • Krishnamurthi Tamilarasan

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 R 2 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.

Suggested Citation

  • Gurunathan Baskar & Sampath Nithica & Ravichandran Pravin & Viswanathan Renuka & Krishnamurthi Tamilarasan, 2026. "Enhanced biodiesel production from Annona squamosa seed oil using Ni-doped CaO nanocatalyst: Process optimization and reaction kinetics," Energy & Environment, , vol. 37(1), pages 423-438, February.
    • Handle: RePEc:sae:engenv:v:37:y:2026:i:1:p:423-438
    DOI: 10.1177/0958305X241241291
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    References listed on IDEAS

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    3. Baskar, G. & Aiswarya, R., 2016. "Trends in catalytic production of biodiesel from various feedstocks," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 496-504.
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