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Pineapple (Ananás comosus) leaves ash as a solid base catalyst for biodiesel synthesis.

Silma de S Barros1, Wanison A G Pessoa Junior2, Ingrity S C Sá1

  • 1Deparatamento de Engenharia de Materiais PPGCEM/UFAM, Av. Octávio Hamilton Botelho Mourão - Coroado, 69067 005 Manaus, Amazonas, Brazil.

Bioresource Technology
|May 30, 2020
PubMed
Summary

Pineapple leaf waste is transformed into an efficient, sustainable catalyst for biodiesel production. This novel material achieves over 98% soybean oil conversion, offering a cost-effective and eco-friendly alternative.

Keywords:
BiodieselHeterogeneous catalysisPineapple waste problemsTransesterification

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Area of Science:

  • Green Chemistry
  • Catalysis
  • Biomass Valorization

Background:

  • Homogeneous catalysts for biodiesel synthesis present challenges like poor reusability and environmental concerns.
  • Developing sustainable and recoverable catalysts is crucial for efficient biodiesel production.
  • Agricultural waste offers a potential source for novel catalytic materials.

Purpose of the Study:

  • To synthesize and characterize a novel catalyst from pineapple leaves waste for biodiesel synthesis.
  • To evaluate the catalytic activity and optimize process parameters for soybean oil transesterification.
  • To demonstrate a cost-effective and environmentally friendly approach to biodiesel production.

Main Methods:

  • Calcination of pineapple leaves waste to produce the catalyst.
  • Comprehensive characterization using XRD, XRF, FTIR, TGA, SEM, and alkalinity measurements.
  • Optimization of transesterification parameters including temperature, catalyst loading, time, and methanol:oil ratio.

Main Results:

  • The novel catalyst, rich in alkali/alkali metals (85 wt%), exhibited high activity.
  • Optimal conditions (60°C, 4 wt% catalyst, 30 min, 1:40 methanol:oil ratio) yielded >98% biodiesel conversion.
  • Characterization confirmed the catalyst's properties and composition.

Conclusions:

  • The pineapple leaf-derived catalyst is efficient, cost-effective, and sustainable for biodiesel synthesis.
  • This method effectively valorizes agricultural waste, reducing environmental impact.
  • The catalyst offers a promising alternative to traditional homogeneous catalysts.