Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology
Cavity perturbation method was used to determine the dielectric properties (ε′, ε″, and tan δ) of zinc oxide dust. The process of dechlorination from zinc oxide dust by microwave roasting was evaluated considering the effect of different roasting temperatures and holding times. The research results...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2016-01-01
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| Series: | Green Processing and Synthesis |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/gps-2015-0041 |
| _version_ | 1819115062417162240 |
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| author | Ma Aiyuan Zheng Xuemei Wang Shixing Peng Jinhui Zhang Libo Li Zhiqiang |
| author_facet | Ma Aiyuan Zheng Xuemei Wang Shixing Peng Jinhui Zhang Libo Li Zhiqiang |
| author_sort | Ma Aiyuan |
| collection | DOAJ |
| description | Cavity perturbation method was used to determine the dielectric properties (ε′, ε″, and tan δ) of zinc oxide dust. The process of dechlorination from zinc oxide dust by microwave roasting was evaluated considering the effect of different roasting temperatures and holding times. The research results showed that the ZnCl2 and PbCl2 with high-loss factor were heated preferentially by microwave, and the dechlorination rate can reach 97.22% after microwave roasting at 650°C for 40 min. The phases of zinc oxide dust before and after microwave roasting were observed and characterized by X-ray diffraction (XRD) analysis. The kinetics of dechlorination from zinc oxide dust was investigated. The three kinetic factors were obtained by the dynamic isothermal method, which provided a theoretical basis for dechlorination from zinc oxide dust. Thermodynamic analysis showed that the volatilization of chlorides was mainly ionic crystal phase transition process. The volatile kinetics of zinc oxide dust were controlled by the solid state diffusion and interface chemical reaction, during the microwave heating, with an activation energy E=46.6 KJ/mol and the reaction order n is level 1. |
| first_indexed | 2024-12-22T04:55:13Z |
| format | Article |
| id | doaj.art-953279f09b1d4a09b12f2a3033d9066f |
| institution | Directory Open Access Journal |
| issn | 2191-9542 2191-9550 |
| language | English |
| last_indexed | 2024-12-22T04:55:13Z |
| publishDate | 2016-01-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Green Processing and Synthesis |
| spelling | doaj.art-953279f09b1d4a09b12f2a3033d9066f2022-12-21T18:38:23ZengDe GruyterGreen Processing and Synthesis2191-95422191-95502016-01-0151495810.1515/gps-2015-0041Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technologyMa AiyuanZheng XuemeiWang ShixingPeng JinhuiZhang LiboLi ZhiqiangCavity perturbation method was used to determine the dielectric properties (ε′, ε″, and tan δ) of zinc oxide dust. The process of dechlorination from zinc oxide dust by microwave roasting was evaluated considering the effect of different roasting temperatures and holding times. The research results showed that the ZnCl2 and PbCl2 with high-loss factor were heated preferentially by microwave, and the dechlorination rate can reach 97.22% after microwave roasting at 650°C for 40 min. The phases of zinc oxide dust before and after microwave roasting were observed and characterized by X-ray diffraction (XRD) analysis. The kinetics of dechlorination from zinc oxide dust was investigated. The three kinetic factors were obtained by the dynamic isothermal method, which provided a theoretical basis for dechlorination from zinc oxide dust. Thermodynamic analysis showed that the volatilization of chlorides was mainly ionic crystal phase transition process. The volatile kinetics of zinc oxide dust were controlled by the solid state diffusion and interface chemical reaction, during the microwave heating, with an activation energy E=46.6 KJ/mol and the reaction order n is level 1.https://doi.org/10.1515/gps-2015-0041dechlorinationdielectric propertykineticsmicrowave roastingzinc oxide dust |
| spellingShingle | Ma Aiyuan Zheng Xuemei Wang Shixing Peng Jinhui Zhang Libo Li Zhiqiang Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology Green Processing and Synthesis dechlorination dielectric property kinetics microwave roasting zinc oxide dust |
| title | Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology |
| title_full | Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology |
| title_fullStr | Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology |
| title_full_unstemmed | Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology |
| title_short | Study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology |
| title_sort | study on dechlorination kinetics from zinc oxide dust by clean metallurgy technology |
| topic | dechlorination dielectric property kinetics microwave roasting zinc oxide dust |
| url | https://doi.org/10.1515/gps-2015-0041 |
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