Hydrotalcite-supported Pd-Cu catalyst for nitrate adsorption and reduction from water
文献类型：期刊论文
| 作者 | Wang Ying; Qu Jiuhui; Liu Huijuan; Wu Rongcheng |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2006 |
| 卷号 | 51期号:12页码:1431-1438 |
| 关键词 | hydrotalcite nitrate adsorption catalytic reduction |
| 英文摘要 | Hydrotalcite-supported Pd-Cu catalyst for nitrate adsorption and catalytic reduction from water is prepared by co-impregnation method and characterized by surface area (BET), X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectrum (XPS). The performance of adsorption and hydrogenation of nitrate was evaluated and compared with Al2O3, TiO2, and HZSM-supported Pd-Cu catalysts. The experimental results demonstrated that hydrotalcite-supported Pd-Cu catalyst exhibited a high surface area (185.3 m(2)/g) and mesopore structure (average pore diameter of 52.2 angstrom). The active metal clusters were homogeneously dispersed on the support, and the size of the most was less than 10 nm. Excellent adsorption for nitrate resulted from that nitrate ions were forced to enter the interlayer space when the calcined hydrotalcite regenerated layer structure in nitrate solution. The adsorption isotherm could be well described by the Langmuir model. The comparison between the adsorption and catalytic hydrogenation for nitrate using hydrogen indicated that nitrate reduction on hydrotalcite-supported Pd-Cu catalysts was a consecutive and dynamic adsorption and catalytic hydrogenation process. Compared with the Al2O3, TlO2, and HZSM-supported catalysts, hydrotalcite-supported Pd-Cu catalyst possessed higher catalytic activity and selectivity. The analysis on the dissolving of metals in the solution demonstrated that there was hydrolyzation on the surface of the hydrotalcite-supported Pd-Cu catalyst. However, the concentrations of dissolved metals in the solution were lower than the standard executed in China. The activity of the hydrotalcite-supported Pd-Cu catalyst for nitrate reduction kept steady after repeated use. |
| WOS记录号 | WOS:000239619800005 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23000]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang Ying,Qu Jiuhui,Liu Huijuan,et al. Hydrotalcite-supported Pd-Cu catalyst for nitrate adsorption and reduction from water[J]. CHINESE SCIENCE BULLETIN,2006,51(12):1431-1438. |
| APA | Wang Ying,Qu Jiuhui,Liu Huijuan,&Wu Rongcheng.(2006).Hydrotalcite-supported Pd-Cu catalyst for nitrate adsorption and reduction from water.CHINESE SCIENCE BULLETIN,51(12),1431-1438. |
| MLA | Wang Ying,et al."Hydrotalcite-supported Pd-Cu catalyst for nitrate adsorption and reduction from water".CHINESE SCIENCE BULLETIN 51.12(2006):1431-1438. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。