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

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

Energy & Environment, 2025, vol. 36, issue 5, 2549-2565

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 (

Keywords: rice husk; rice husk ash; gasifier; gasifier-derived rice husk ash; magnesio-milling; silicon (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:sae:engenv:v:36:y:2025:i:5:p:2549-2565

DOI: 10.1177/0958305X231204991

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