Effect of Gas Distributor on Hydrodynamics and the Rochow Reaction in a Fluidized Bed Membrane Reactor

Zhang, Feng; Zhang, Zhihao; Liu, Yefei; Zhong, Zhaoxiang; Xing, Weihong

doi:10.1021/acs.iecr.6b02028

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Zhang et al suggested that the optimized Syamlal-O'Brien drag model can reasonably predict hydrodynamic behavior in the fluidized bed membrane reactor, and the computational fluid dynamics simulation results showed good agreement with the experimental data (Figure 10a). [53] The effects of gas distributor configuration on Rochow-Müller process were also tested experimentally, and M2 selectivity and Si conversion were both increased, as shown in Figure 10b.…”

Section: Reactor Optimizationmentioning

confidence: 99%

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Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

et al. 2019

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The Rochow‐Müller process, an old process that has been known for more than seventy years, is for the direct synthesis of methylchlorosilane. However, due to its unique economic efficiency, it is still extremely important in silicone industry, e. g., about 90 % of starting materials for producing silicones are obtained by this route. Although significant progress has been made in exploring high‐efficient catalysts and understanding its mechanism, a quantitative description of this reaction is still far‐fetched due to its high complexity. In addition, sustainable use and recycling of by‐products and waste solid have become imperative nowadays due to the increasing demands for atom economy and environmental protection. This paper provides a comprehensive overview and insights into Rochow‐Müller process from its catalysis to sustainable issues, including the catalyst development and reaction mechanism investigation, waste reutilization and their derived products. In addition, several emerging novel processes originated from Rochow‐Müller process are summarized. Lastly, challenges and perspectives with respect to this reaction are discussed. We hope this work has accurately reflected and recorded the transition of Rochow‐Müller process to modern molecular catalysis, and can promote a much more sustainable silicone industry.

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Section: Reactor Optimizationmentioning

confidence: 99%

Section: Chemistry: State‐of‐the‐artmentioning

confidence: 99%

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

et al. 2019

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“…Solid volume fraction and M2 (DMDC) selectivity in a lab-scale FBR with different distributor configurations: left, solid volume fraction; right, M2 selectivity. Reprinted with permission from ref . Copyright 2016 American Chemical Society.…”

Section: Reactor Design For M2 Productionmentioning

confidence: 99%

“…A gas distributor strongly affects the gas distribution and solid fluidization quality in a fluidized bed reactor. Zhang et al 91 developed a 3D computational model to simulate MCS synthesis in an FBR and investigated the effects of the ratio of open area and holes number of the gas distributor on the gas−solid flow, M2 selectivity, and silicon conversion in the reactor. Authors found that a gas distributor with 0.53% opening ratio and 19 holes showed a steadier radial solid-volume-fraction-distribution and a smaller dead-zonearea.…”

Section: Gas Distributormentioning

confidence: 99%

Direct Synthesis of Methylchlorosilanes: Catalysts, Mechanisms, Reaction Conditions, and Reactor Designs

Zhang

Dong

et al. 2022

Org. Process Res. Dev.

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Silicone polymers are produced commercially mainly from methylchlorosilanes prepared by direct synthesis. The yield and selectivity of this synthetic process depend not only on chemical reactions but also on transfer phenomena, leading to conflicting results and controversial interpretations within this research field. This review highlights recent advances in synthesis mechanisms, including catalysts and promoters, especially the effect of process parameters and reactor form on the reactivity and selectivity of the reaction. This review shows that different catalysts and their structures and promoters lead to significant differences in reaction rates and product distributions. Process parameters such as feed gas velocity and composition, reaction temperature, reaction pressure, silica fume, etc., as well as synthesis reactor structure have influenced the reaction rate and yield distribution. Although there is some consensus on understanding the influence of operating parameters, synthesis reactor structure, and reaction kinematics, further studies are still needed to elucidate the catalytic mechanism and synergistic mechanism between the reaction and transfer processes. It also reviews recent trends in these response characteristics in previously reported studies and offers important directions for future research in this field.

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Formation Mechanism and Strengthening Method of Si8Al6Fe4Ca During the Solidification of Metallurgical-Grade Silicon

Zhou,

Wei,

Zhu

et al. 2023

Metall Mater Trans B

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Effect of Gas Distributor on Hydrodynamics and the Rochow Reaction in a Fluidized Bed Membrane Reactor

Cited by 8 publications

References 19 publications

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

Direct Synthesis of Methylchlorosilanes: Catalysts, Mechanisms, Reaction Conditions, and Reactor Designs

Formation Mechanism and Strengthening Method of Si8Al6Fe4Ca During the Solidification of Metallurgical-Grade Silicon

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