Biodiesel Production Using Lithium Metasilicate Synthesized from Non-Conventional Sources

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.