Use of rice husk for emission neutral energy generation and synthesis of solar-grade silicon feedstock

Abstract

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Magnesiothermic Reduction of Natural Quartz

“…Although the magnesiothermic production of Si with a purity (> 99.9 wt pct) is promising, scalability of the process and low Si yield has so far limited its further development. [4][5][6][7][8][9] Further additional purification to achieve the high purities required in current high performance solar cell production would be required. As such, the overall scope of work is to produce a reduction product high in Mg 2 Si, which could be directly transformed into silane gas suitable for the Siemens route.…”

Highly mesoporous silicon derived from waste iron slag for high performance lithium ion battery anodes

“…S2 †). Aer the second leaching with HF and acetic acid to remove Mg 2 SiO 4 , 33,34 the peaks of Mg 2 SiO 4 disappeared and MgF 2 peaks appeared due to the reaction of Mg 2 SiO 4 with HF. 35 In this sense, introduction of a heat scavenger is crucial to prevent the formation of undesirable side products, such as Mg 2 SiO 4 , as well as to prevent signicant sintering of Si.…”

High-Temperature Reactive Wetting of Natural Quartz by Liquid Magnesium

“…The metallothermic reduction of SiO 2 , including aluminothermic and magnesiothermic reduction, to produce Si for various applications has received increasing attention in recent years. These applications include high-purity Si and Si with special mesoporous structures for application, mainly in Li-ion batteries [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. The difference in melting points of SiO 2 as the oxide phase and metals like Mg and Al suggests that the metallothermic reduction reaction might occur between the solid oxide and the liquid metal, where the diffusion rate of metal and the wettability of SiO 2 by the metal influence the reaction mechanism.…”