Chemical solidification/stabilization of arsenic sulfide and oxide mixed wastes using elemental sulfur: Efficiencies, mechanisms and long-term stabilization enhancement by dicyclopentadiene
文献类型：期刊论文
| 作者 | Kong, Linghao ; Xia, Zhilin; Hu, Xingyun; Peng, Xianjia
|
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2021-12-05 |
| 卷号 | 294页码:- |
| 关键词 | NOx reduction NH3-SCR Cu-SSZ-39 Hydrothermal aging CuxOy species |
| ISSN号 | 0926-3373 |
| 英文摘要 | The control of nitrogen oxides (NOx) from heavy-duty diesel vehicles is becoming increasingly urgent due to its detrimental effects on the environment. Cu-SSZ-39, with its exceptional NH3-SCR activity and hydrothermal stability, has attracted more and more attention in the field of diesel vehicle emission control. In this work, an unexpected phenomenon was observed for Cu-SSZ-39 after hydrothermal aging. Generally, the hydrothermal aging process causes deterioration of the catalytic performance of catalysts. However, a remarkable increase in low-temperature NH3-SCR catalytic activity was observed in Cu-SSZ-39 after it was exposed to 850 degrees C hydrothermal aging conditions for 16 h. EPR, DRIFTS, H-2-TPR, UV-vis and XANES were utilized to detect the changes in Cu species. It was determined that a portion of the Cu2+ ions near double six-membered rings (d6r) transformed into CuxOy species after hydrothermal treatment. These CuxOy species facilitated the production of nitrate species which were critical intermediates in the NH3-SCR process, resulting in an increase in low-temperature catalytic activity. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/46842]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Beijing Key Lab Ind Wastewater Treatment & Resour, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kong, Linghao,Xia, Zhilin,Hu, Xingyun,et al. Chemical solidification/stabilization of arsenic sulfide and oxide mixed wastes using elemental sulfur: Efficiencies, mechanisms and long-term stabilization enhancement by dicyclopentadiene[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,294:-. |
| APA | Kong, Linghao,Xia, Zhilin,Hu, Xingyun,&Peng, Xianjia.(2021).Chemical solidification/stabilization of arsenic sulfide and oxide mixed wastes using elemental sulfur: Efficiencies, mechanisms and long-term stabilization enhancement by dicyclopentadiene.JOURNAL OF HAZARDOUS MATERIALS,294,-. |
| MLA | Kong, Linghao,et al."Chemical solidification/stabilization of arsenic sulfide and oxide mixed wastes using elemental sulfur: Efficiencies, mechanisms and long-term stabilization enhancement by dicyclopentadiene".JOURNAL OF HAZARDOUS MATERIALS 294(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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