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Process and Kinetics Study of Se Preparation by SO2 Reduction of SeO2 AITranslate

ZENG Yan-liang; ZOU Jian-bo; LIAO Chun-fa; LIU Fu-peng
Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology
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Publisher: Editorial Office of Rare Metals and Cemented Carbides
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Abstract AITranslate

The effects of reaction temperature,H2SO4 concentration,SO2 flow rate and reaction time on the preparation process of Se by SO2 reduction of SeO2 were investigated,the kinetics of the process was stu-died,and the optimal process conditions and kinetic restrictive control links were obtained.The results show that under the conditions of the reaction temperature of 40 ℃,H2SO4 concentration of 1 mol/L,SO2 flow rate of 60 mL/min,and reaction time of 30 min,the reduction rate of Se reaches 99.73%,preparing Se with a purity of 99.85%.By controlling the conditions,different forms of Se can be obtained:amorphous red Se at low temperatures and well-crystallized black Se at high temperatures.The preparation process of Se by SO2 reduction of SeO2 conforms to the Avrami model,controlled by diffusion with an apparent activation energy of 1.98 kJ/mol,and described by the kinetics equation of-ln(1-X)=0.178×e-238/Tt1.276.

KeyWords AITranslate

Se SeO2 SO2 reduction kinetics process condition

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Basic Information:

DOI：

Chinese Library Classification Number:TF843.5[冶金工程—有色金属冶金]

Citation Information:

The effects of reaction temperature,H2SO4 concentration,SO2 flow rate and reaction time on the preparation process of Se by SO2 reduction of SeO2 were investigated,the kinetics of the process was stu-died,and the optimal process conditions and kinetic restrictive control links were obtained.The results show that under the conditions of the reaction temperature of 40 ℃,H2SO4 concentration of 1 mol/L,SO2 flow rate of 60 mL/min,and reaction time of 30 min,the reduction rate of Se reaches 99.73%,preparing Se with a purity of 99.85%.By controlling the conditions,different forms of Se can be obtained:amorphous red Se at low temperatures and well-crystallized black Se at high temperatures.The preparation process of Se by SO2 reduction of SeO2 conforms to the Avrami model,controlled by diffusion with an apparent activation energy of 1.98 kJ/mol,and described by the kinetics equation of-ln(1-X)=0.178×e-238/Tt1.276.

quote

GB/T 7714-2015 [1] ZENG Yan-liang, ZOU Jian-bo, LIAO Chun-fa, et al. Process and Kinetics Study of Se Preparation by SO2 Reduction of SeO2[J]. Rare Metals and Cemented Carbides, 2023(4): 33-38.
MLA [1] ZENG Yan-liang, et al., "Process and Kinetics Study of Se Preparation by SO2 Reduction of SeO2." Rare Metals and Cemented Carbides, no. 4, 2023, pp. 33-38.
APA [1] ZENG Yan-liang, ZOU Jian-bo, LIAO Chun-fa, & LIU Fu-peng. (2023). Process and Kinetics Study of Se Preparation by SO2 Reduction of SeO2. Rare Metals and Cemented Carbides(4), 33-38.
IEEE [1] ZENG Yan-liang, ZOU Jian-bo, LIAO Chun-fa, and LIU Fu-peng, "Process and Kinetics Study of Se Preparation by SO2 Reduction of SeO2," Rare Metals and Cemented Carbides, no. 4, pp. 33-38, 2023. keywords: {Se;SeO;SO;reduction;kinetics;process condition}