Agricultural Waste Rice Husk Collection

Mechanical Cleaning & Washing

Thermal Drying Low-Temp Drying Process

Pre-Processed Rice Husk

Controlled Pyrolysis in Oxygen-Limited Reactor

Optimal Parameters: Temperature, Time, Atmosphere

Intermediate Product: High-Purity Rice Husk Ash RHA

Alkaline Leaching with Potassium Hydroxide KOH

Precipitation & Gel Formation using Citric Acid

Washing & Neutralization pH Adjustment

Wet Nano-Silica Gel

Advanced Drying Spray Drying or Supercritical CO₂ Drying

Precision Milling & Classification Jet Milling to Target Nanoparticle Size

Core Product: High-Purity Nano-Silica Powder

Rigorous Material Characterization BET Surface Area, XRD, SEM-EDS, TEM

Recycle or Reprocess

Formulation & Integration into Epoxy Molding Compounds EMCs