Recovery of tungsten and titanium from spent SCR catalyst by sulfuric acid leaching process
文献类型：期刊论文
| 作者 | Zhao, Chen2,3; Wang, Chenye1,2,3; Wang, Xingrui2,3; Li, Huiquan2,3,4; Chen, Yan2,3; Wu, Wenfen2,3 |
| 刊名 | WASTE MANAGEMENT
 |
| 出版日期 | 2023 |
| 卷号 | 155页码:338-347 |
| ISSN号 | 0956-053X |
| 关键词 | Spent selective catalytic reduction catalyst Acid leaching Recycling Titanium-Tungsten powder Denitration |
| DOI | 10.1016/j.wasman.2022.11.013 |
| 英文摘要 | The widespread use of selective catalytic reduction (SCR) catalysts has resulted in a large accumulation of spent SCR catalysts. These spent catalysts present a significant risk of environmental hazards and potential for resource recovery. This paper presents a feasible process, which works using atmospheric pressure leaching, of tungsten and titanium recovery from spent SCR catalysts. In this new method, titanium and tungsten are simultaneously leached with sulfuric acid as the leaching agent. After hydrolysis and calcination, titanium-tungsten powder with low impurity and reconstructed pore properties was obtained. The optimal conditions for the leaching of Ti and W were as follows: temperature, 150 degrees C; reaction time, 60 min; H2SO4 concentration, 80 %; mass ratio of H2SO4/TiO2, 3:1; and diluted H2SO4 concentration, 20 % after reaction. With these optimum conditions, the leaching efficiency of Ti and W were found to be 95.92 % and 93.83 %, respectively. The ion speciation and reaction mechanism of W were studied by Raman spectroscopy, FTIR, and UV-vis. The formation of heteropolytungstate with a Keggin structure is essential for the synergistic leaching of Ti and W, as the heteropolytungstate can be stably dissolved in the acid solution. During the hydrolysis process, heteropolytungstate gradually decomposed into Ti4+ and WO42- due to the formation of insoluble Ti(OH)(4) from Ti4+ in the solution. This study demonstrated an effective method for synergistic recovery of titanium and tungsten from the spent SCR catalyst. |
| WOS关键词 | OXALIC-ACID ; VANADIUM ; REDUCTION ; ILMENITE ; KINETICS ; PHOTOCATALYSTS ; OXIDE ; PRECIPITATION ; REGENERATION ; SPECTROSCOPY |
| 资助项目 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; [2018YFC1900602] ; [51904287] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000904786200008 |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/56421]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Wang, Chenye |
| 作者单位 | 1.1 North 2nd St, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Reso, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Chen,Wang, Chenye,Wang, Xingrui,et al. Recovery of tungsten and titanium from spent SCR catalyst by sulfuric acid leaching process[J]. WASTE MANAGEMENT,2023,155:338-347. |
| APA | Zhao, Chen,Wang, Chenye,Wang, Xingrui,Li, Huiquan,Chen, Yan,&Wu, Wenfen.(2023).Recovery of tungsten and titanium from spent SCR catalyst by sulfuric acid leaching process.WASTE MANAGEMENT,155,338-347. |
| MLA | Zhao, Chen,et al."Recovery of tungsten and titanium from spent SCR catalyst by sulfuric acid leaching process".WASTE MANAGEMENT 155(2023):338-347. |
入库方式： OAI收割
来源：过程工程研究所
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