Direct Solid-State Electrochemical Synthesis of Silicon Tetrachloride from Silica at Ambient Temperatures and Pressures

Ariwahjoedi, Bambang; Fuad, Khairul; Ariefin, Mokhamat

doi:10.1149/1.3490301

Cited by 2 publications

(3 citation statements)

References 28 publications

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“…On the other hand, STC is industrially manufactured via the chlorination process using metallurgical Si, ferro Si, Si carbide, and agricultural rice husk. , However, this chlorination process occurs at high reaction temperatures (i.e., 400–1100 °C), leading to severe equipment corrosion, high energy consumption, and low purity in the product. Inspired by the Si hydrochlorination and chlorination process, − should some novel catalysts be developed to improve STC selectivity and lower TCS production, it would be possible to produce STC using a hydrochlorination reactor currently being used to manufacture TCS in industry.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, STC is industrially manufactured via the chlorination process using metallurgical Si, 31 ferro Si, 32 Si carbide, 33 and agricultural rice husk. 34,35 However, this chlorination process occurs at high reaction temperatures (i.e., 400−1100 °C), leading to severe equipment corrosion, high energy consumption, and low purity in the product.…”

Section: Introductionmentioning

confidence: 99%

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Ni-Ni₃P/SiO₂ Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination

Luo

Song

et al. 2022

Ind. Eng. Chem. Res.

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SiHCl3 (TCS) and SiCl4 (STC), important chlorosilanes in the silicon industry, are currently produced by noncatalytic silicon hydrochlorination with a selectivity of 85% for TCS and 15% for STC approximately. It is a significant challenge to selectively produce TCS and STC with the desired ratio in one reactor to realize flexible manufacturing that meets the periodic market demands. In the present work, we develop a novel Ni-Ni3P/SiO2 catalyst using a simple reduction synthesis method to produce STC selectively in Si hydrochlorination. The catalyst performance is evaluated under different industrial operating conditions. It shows that the Ni-Ni3P/SiO2 catalyst exhibits a selectivity higher than 90% for STC and a selectivity of <10% for TCS under the optimal conditions. The calculations based on the density functional theory show that P-modified Ni-based catalysts promote the breakage of HCl bonds and make the product favor STC instead of TCS. Therefore, it is possible to realize flexible manufacture of TCS and STC in one reactor by combining the CuO-based catalysts reported in our previous work to enhance TCS production and the Ni-Ni3P/SiO2 catalyst developed in this work to promote STC production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ni-Ni₃P/SiO₂ Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination

Luo

Song

et al. 2022

Ind. Eng. Chem. Res.

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“…. Currently, SiO 2 is positioned as an important raw material for cement, glass, semiconductor, and optical communications industries. − Silicon tetrachloride (SiCl 4 ) produced from SiO 2 has been conventionally used as a feedstock gas in the production of fine ceramics such as high-purity SiO 2 , SiC, and SiN 4 by chemical vapor deposition . Traditionally, SiCl 4 has been produced by reacting chlorine gas with SiC, produced from a mixture of SiO 2 and carbon, at a temperature of approximately 600 °C .…”

Section: Introductionmentioning

confidence: 99%

Production of Silicone Tetrachloride from Rice Husk by Chlorination and Performance of Mercury Adsorption from Aqueous Solution of the Chlorinated Residue

et al. 2020

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The production of silicone tetrachloride (SiCl 4 ) from rice husk char by chlorination was investigated, and the effect of the char preparation temperature on SiCl 4 volatilization and the coexisting element species in the char was examined. The behavior of chlorine (Cl) and the change in pore properties during char chlorination were analyzed, and the reaction mechanism was discussed. The performance of Hg ion removal of the chlorination residue was also investigated. At 1000 °C chlorination, the optimum rice husk pyrolysis temperature for attaining high ashrelease extent was 800 °C. Ash volatilization during char chlorination with heat treatment mainly occurred at >300 °C and reached a release extent of ∼75% by 1000 °C. Si and P volatilization started at >300 °C and reached 70−75% by 1000 °C. In contrast, Na and K the volatilization occurred at >700 °C, with a 50% volatilization extent by 1000 °C. Mg and Ca had a volatilization rate of <20% by 1000 °C. When the char was held at 1000 °C, the release extent of Si and P reached 75−80% by 10 min. Na and K volatilized almost completely by 10 min, and the release extent of Mg and Ca increased with increasing holding time and became 10−50% by 60 min. The Cl content in the residue obtained at each chlorination temperature increased from 300 to 700 °C and then decreased with increasing temperature. The majority of Cl taken up in the residue was an H 2 O insoluble form. The surface area and pore volume of the chlorinated residue tended to increase with increasing chlorination temperature, with the former increasing to 335 m 2 /g at 1000 °C and 10 min holding. The maximum mercury adsorption amount of the chlorinated residue obtained at 1000 °C, 10 min holding was 620 mg/g, indicating the mercury ion adsorption performance of the chlorinated residue.

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Direct Solid-State Electrochemical Synthesis of Silicon Tetrachloride from Silica at Ambient Temperatures and Pressures

Cited by 2 publications

References 28 publications

Ni-Ni₃P/SiO₂ Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination

Ni-Ni₃P/SiO₂ Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination

Production of Silicone Tetrachloride from Rice Husk by Chlorination and Performance of Mercury Adsorption from Aqueous Solution of the Chlorinated Residue

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Direct Solid-State Electrochemical Synthesis of Silicon Tetrachloride from Silica at Ambient Temperatures and Pressures

Cited by 2 publications

References 28 publications

Ni-Ni3P/SiO2 Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination

Ni-Ni3P/SiO2 Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination

Production of Silicone Tetrachloride from Rice Husk by Chlorination and Performance of Mercury Adsorption from Aqueous Solution of the Chlorinated Residue

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Ni-Ni₃P/SiO₂ Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination

Ni-Ni₃P/SiO₂ Catalyst for Highly Selective Production of Silicon Tetrachloride via Silicon Hydrochlorination