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Biodiesel Production Using Lithium Metasilicate Synthesized from Non-Conventional Sources.

Eduardo Coutino-Gonzalez1, Mario Ávila-Gutiérrez1, Arnold Hernández-Palomares2

  • 1Centro de Investigaciones en Óptica, A. C. Lomas del Bosque 115, Colonia Lomas del Campestre, León, Guanajuato 37150, Mexico.

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|October 14, 2022
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Summary

Researchers developed a simple method to create lithium metasilicate from Mexican sand. This material efficiently catalyzed biodiesel production from soybean oil, achieving 95.5% conversion and showing good stability.

Keywords:
Li2SiO3biodieselcatalysisheterogeneous catalysisrenewable fuelsvalorization

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Area of Science:

  • Materials Science
  • Catalysis
  • Green Chemistry

Background:

  • Lithium metasilicate (Li2SiO3) is a valuable material with diverse applications.
  • Developing sustainable synthesis routes and exploring novel catalytic uses are critical research areas.

Purpose of the Study:

  • To establish a facile and versatile process for producing high-purity lithium metasilicate from non-conventional silicon sources.
  • To evaluate the efficacy of synthesized lithium metasilicate as a heterogeneous catalyst for biodiesel production.

Main Methods:

  • Solid-state reaction followed by hydrothermal treatment for lithium metasilicate synthesis.
  • Characterization using X-ray Diffraction (XRD), Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), and X-ray Photoelectron Spectroscopy (XPS).
  • Biodiesel production from soybean oil using synthesized lithium metasilicate as a catalyst, with varying silicon sources.

Main Results:

  • Highly pure lithium metasilicate was successfully synthesized from two different Mexican sand sources.
  • The synthesized lithium metasilicate demonstrated excellent catalytic activity in biodiesel production, achieving a maximum conversion yield of 95.5%.
  • The catalyst exhibited superior chemical stability against humidity compared to conventional heterogeneous catalysts.

Conclusions:

  • A cost-effective and sustainable method for lithium metasilicate production from readily available sand precursors has been demonstrated.
  • Lithium metasilicate shows significant potential as an efficient and stable heterogeneous catalyst for green biodiesel production.
  • This work offers an alternative pathway for utilizing non-conventional materials in industrial catalytic processes.