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Mechano-chemical conversion of rice husk ash and gasifier-derived rice husk ash into porous silicon

Author

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  • Seong Hye Son
  • Hae In Lee
  • Won Chul Cho
  • Ui Myung Chung
  • Ho Won Ra
  • Sung Min Yoon
  • Jae Goo Lee
  • Young Woo Rhee
  • Myung Won Seo

Abstract

Rice husk is an abundant agricultural biomass and a potential source of amorphous silica and porous silicon. To produce high-purity SiO 2 and Si from rice husks, multiple steps of acid leaching to remove impurities and heat treatment to reduce residual carbon are necessary. In this study, a simple mechanochemical (magnesio-milling) experiment was conducted using an attrition mill to convert rice husk ash (RHA) and gasifier-derived rice husk ash (GRHA) into porous Si under various acid leaching (hydrochloric acid and lactic acid) and heat-treatment conditions. Three noteworthy results were obtained. First, eco-friendly lactic acid can be used instead of the harmful acid (hydrochloric acid). Next, the heat-treated GRHA was converted to Si via magnesio-milling without acid leaching. Finally, the carbon content (

Suggested Citation

  • Seong Hye Son & Hae In Lee & Won Chul Cho & Ui Myung Chung & Ho Won Ra & Sung Min Yoon & Jae Goo Lee & Young Woo Rhee & Myung Won Seo, 2025. "Mechano-chemical conversion of rice husk ash and gasifier-derived rice husk ash into porous silicon," Energy & Environment, , vol. 36(5), pages 2549-2565, August.
    • Handle: RePEc:sae:engenv:v:36:y:2025:i:5:p:2549-2565
    DOI: 10.1177/0958305X231204991
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