Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR
文献类型：期刊论文
| 作者 | Shan, Yulong; Sun, Yu; Du, Jinpeng ; Zhang, Yan; Shi, Xiaoyan; Yu, Yunbo; Shan, Wenpo; He, Hong
|
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2020-10-15 |
| 卷号 | 275页码:1-11 |
| 关键词 | Hydrothermal aging Fast SCR Inhibition effects Cu-SSZ-13 Bronsted acid sites |
| ISSN号 | 0926-3373 |
| 英文摘要 | Fresh and hydrothermally aged Cu-SSZ-13 catalysts were tested for the standard and fast selective catalytic reduction of NOx with NH3 (NH3-SCR). Interestingly, NO2 exhibited distinctly different effects on these two catalysts. NOx conversion over fresh Cu-SSZ-13 was clearly inhibited by NO2, while hydrothermal aging could reverse this inhibition effect. It was found that the NOx conversion decreased with progressive hydrothermal aging under standard SCR (SSCR) conditions but increased under fast SCR (FSCR) conditions. The N-2 adsorption/desorption isotherms indicated the formation of mesopores induced by hydrothermal aging, which is favorable for gas diffusion. Temperature programmed desorption (TPD) and in situ DRIFTS, combined with other auxiliary measurements, demonstrated that L-NH3 (NH3 adsorbed onto Lewis acid sites) is more active toward both NO+O-2 and NO2 for the formation of N-2, while B-NH3 (NH3 adsorbed onto Bronsted acid sites) is mainly responsible for the formation of NH4NO3. The amount and stability of NH4NO3 formed under FSCR conditions decreased with progressive hydrothermal aging due to the loss of Bronsted acid sites. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45079]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | Shan, Yulong,Sun, Yu,Du, Jinpeng,et al. Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,275:1-11. |
| APA | Shan, Yulong.,Sun, Yu.,Du, Jinpeng.,Zhang, Yan.,Shi, Xiaoyan.,...&He, Hong.(2020).Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR.APPLIED CATALYSIS B-ENVIRONMENTAL,275,1-11. |
| MLA | Shan, Yulong,et al."Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR".APPLIED CATALYSIS B-ENVIRONMENTAL 275(2020):1-11. |
入库方式： OAI收割
来源：生态环境研究中心
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