Synthesis and Characterization of Na-P1 (GIS) Zeolite Using Rice Husk

Area of Science:

• Materials Science
• Inorganic Chemistry
• Green Chemistry

Background:

• Traditional synthesis of Na-P1 zeolite relies on expensive chemicals like sodium aluminates and silicates.
• Rice husk is an abundant agricultural waste product rich in silica.

Purpose of the Study:

• To investigate the feasibility of using rice husk ash as a silica source for Na-P1 zeolite synthesis.
• To develop an economically viable and environmentally sustainable method for Na-P1 zeolite production.

Main Methods:

• Calcination of rice husk at 550 °C to produce rice husk ash.
• Synthesis of Na-P1 zeolite from rice husk ash, NaOH, and NaAlO2 under varying SiO2/Al2O3 ratios (3.5 and 5.3).
• Characterization using X-ray diffraction, scanning electron microscopy, infrared spectroscopy, Raman spectroscopy, BET surface area analysis, and differential thermal analysis.

Main Results:

• Successful synthesis of Na-P1 (GIS) zeolite using rice husk ash.
• Characterization confirmed the formation of pure Na-P1 zeolite with no significant impurities or amorphous phases.
• Rietveld refinement provided accurate cell parameters for the synthesized zeolite.

Conclusions:

• Rice husk is a viable and cost-effective precursor for Na-P1 zeolite synthesis.
• The developed method offers significant economic and environmental benefits compared to conventional approaches.
• The high yields and successful characterization suggest strong potential for industrial-scale application.