Removal of V and Fe from spent denitrification catalyst by using oxalic acid: Study of dissolution kinetics and toxicity
文献类型：期刊论文
| 作者 | Wu, Wenfen1,2; Wang, Chenye1; Wang, Xingrui1; Li, Huiquan1,2 |
| 刊名 | Green Energy and Environment
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 6期号:5页码:660-669 |
| 关键词 | Toxicity - Dissolution - Redox reactions - Leaching - Denitrification - Kinetics - Oxalic acid |
| ISSN号 | 20962797 |
| DOI | 10.1016/j.gee.2020.03.011 |
| 英文摘要 | The selective dissolution of V and Fe from spent denitrification catalyst (SDC) with oxalic acid was investigated to minimise their environmental effects. The dissolution kinetics of different elements from SDC by using 0.1鈥?.5 mol L鈭? oxalic acid concentration was studied at 60 掳C鈥?0 掳C. V and Fe were preferentially released (65% and 81%) compared with Al, Ti and W within 5 min due to the redox reactions of oxalic acid. The dissolved fractions of Fe, V, Al, W and Ti increased with the increase of oxalic acid concentration and reaction temperature. The dissolution kinetic experiments were analysed and controlled diffusion with n 2 > 0.92). The Arrhenius parameters of the Ea values of Ti, W, V, Fe and Al from SDC with oxalic acid were 30, 26, 20, 19 and 11 kJ mol鈭?, respectively. The obtained Avrami equation of V and Fe was successfully used to predict their leaching behaviour in oxalic acid. Toxicity characteristic leaching procedure revealed that the toxicity risk of V and Fe metals from SDC after leaching with oxalic acid decreased to below 5 mg kg鈭? residua. Overall, the leaching residua by oxalic acid indicated its safety for the environment. 漏 2021 Institute of Process Engineering, Chinese Academy of Sciences |
| 学科主题 | Catalysts |
| 项目编号 | The authors are grateful for the financial support of the National Natural Science Foundation of China (No. 51574214). |
| 出版者 | KeAi Publishing Communications Ltd. |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/60286]  |
| 作者单位 | 1.CAS Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 2.College of Chemical and Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China |
| 推荐引用方式 GB/T 7714 | Wu, Wenfen,Wang, Chenye,Wang, Xingrui,et al. Removal of V and Fe from spent denitrification catalyst by using oxalic acid: Study of dissolution kinetics and toxicity[J]. Green Energy and Environment,2021,6(5):660-669. |
| APA | Wu, Wenfen,Wang, Chenye,Wang, Xingrui,&Li, Huiquan.(2021).Removal of V and Fe from spent denitrification catalyst by using oxalic acid: Study of dissolution kinetics and toxicity.Green Energy and Environment,6(5),660-669. |
| MLA | Wu, Wenfen,et al."Removal of V and Fe from spent denitrification catalyst by using oxalic acid: Study of dissolution kinetics and toxicity".Green Energy and Environment 6.5(2021):660-669. |
入库方式： OAI收割
来源：过程工程研究所
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