Heterogeneously catalyzed transesterification reaction using waste snail shell for biodiesel production

Area of Science:

• Green Chemistry and Sustainable Energy
• Catalysis and Materials Science

Background:

• Biodiesel production is crucial for sustainable energy, but cost-effective and environmentally friendly methods are needed.
• Waste cooking oil and waste snail shells represent abundant, underutilized resources for green chemical synthesis.

Purpose of the Study:

• To develop a low-cost, green synthesis technique for biodiesel production.
• To investigate the efficacy of a waste snail shell-derived catalyst in waste cooking oil methanolysis.
• To optimize reaction parameters for maximizing biodiesel yield and purity.

Main Methods:

• Green synthesis of a catalyst from waste snail shells via calcination (2-4 h at 750-950 °C).
• Characterization of the catalyst using XRD, BET, EDX, and FT-IR.
• Methanolysis of waste cooking oil under varied conditions (MeOH:oil ratio, catalyst loading, temperature, time) and model optimization.

Main Results:

• The waste snail shell catalyst was successfully synthesized and characterized.
• Optimized reaction parameters (21.5 MeOH:oil ratio, 9.8 wt% catalyst, 4.8 h, 62.2 °C) yielded biodiesel with 95% ester content.
• The process demonstrates efficient biodiesel production from waste materials.

Conclusions:

• Waste snail shells can be effectively utilized as a low-cost catalyst for green biodiesel production.
• The developed methanolysis process offers a sustainable route to convert waste cooking oil into high-purity biodiesel fuel.
• This approach contributes to waste valorization and the development of renewable energy sources.