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Wang X, Ran J, Duan H, Chen Y, Zhao J, Yin S, Li S, Zhang L. Combining ozone and ultrasound technology to remove S 2- in Bayer liquor. ULTRASONICS SONOCHEMISTRY 2023; 101:106684. [PMID: 37979278 PMCID: PMC10692704 DOI: 10.1016/j.ultsonch.2023.106684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 10/27/2023] [Accepted: 11/05/2023] [Indexed: 11/20/2023]
Abstract
High content sulfur (S2-) in Bayer liquor can increase alkali consumption, accelerate equipment corrosion, especially seriously affect alumina production. The removal of S2- in Bayer liquor is studied using ultrasonic enhanced ozone method, which significantly improves the removal efficiency. Results indicate that the best removal efficiency of 93.83 % is obtained with reaction duration of 20 min, oxygen flow rate of 80 L/h, ultrasonic power of 60 W and reaction temperature of 60 °C. The comparative analysis shows that the removal efficiency of S2- is 25.34 % higher than that of ozone (O3) system after introducing ultrasound (US), indicating that US accelerates the mass transfer process of O3 and increases the hydroxyl radicals (OH) content. For further explanation of the mechanism of US/O3 system, EPR and XPS spectra are applied to analyze the content of free radical and the form of sulfur in Bayer liquor, indicating that the content of free radical in US/O3 system is more than US and O3 systems, and all sulfur is converted to SO42- after full oxidation.
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Affiliation(s)
- Xuxu Wang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
| | - Jianfeng Ran
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
| | - Haisheng Duan
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Yunnan Wenshan Aluminum Co., Ltd., Wenshan, Yunnan 663000, China
| | - Ying Chen
- Yunnan Wenshan Aluminum Co., Ltd., Wenshan, Yunnan 663000, China
| | - Jiaping Zhao
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Yunnan Wenshan Aluminum Co., Ltd., Wenshan, Yunnan 663000, China
| | - Shaohua Yin
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Shiwei Li
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Libo Zhang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
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Lei L, Huang D, Zeng G, Cheng M, Jiang D, Zhou C, Chen S, Wang W. A fantastic two-dimensional MoS2 material based on the inert basal planes activation: Electronic structure, synthesis strategies, catalytic active sites, catalytic and electronics properties. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213020] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Wu W, Niu C, Wei C, Jia Y, Li C, Xu Q. Activation of MoS2
Basal Planes for Hydrogen Evolution by Zinc. Angew Chem Int Ed Engl 2019; 58:2029-2033. [DOI: 10.1002/anie.201812475] [Citation(s) in RCA: 144] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/13/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Wenzhuo Wu
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Chunyao Niu
- International Laboratory for Quantum Functional Materials of Henan; School of Physics and Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Cong Wei
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Yu Jia
- International Laboratory for Quantum Functional Materials of Henan; School of Physics and Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Chong Li
- International Laboratory for Quantum Functional Materials of Henan; School of Physics and Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Qun Xu
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
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Wu W, Niu C, Wei C, Jia Y, Li C, Xu Q. Activation of MoS2
Basal Planes for Hydrogen Evolution by Zinc. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812475] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenzhuo Wu
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Chunyao Niu
- International Laboratory for Quantum Functional Materials of Henan; School of Physics and Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Cong Wei
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Yu Jia
- International Laboratory for Quantum Functional Materials of Henan; School of Physics and Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Chong Li
- International Laboratory for Quantum Functional Materials of Henan; School of Physics and Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Qun Xu
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
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