Highly Selective PdCu/Amorphous Silica-Alumina (ASA) Catalysts for Groundwater Denitration
文献类型：期刊论文
| 作者 | Xie, Yongbing1,2,3; Cao, Hongbin1,2,3; Li, Yuping1,2,3; Zhang, Yi1,2,3; Crittenden, John C.4 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2011-05-01 |
| 卷号 | 45期号:9页码:4066-4072 |
| 关键词 | nitrate reduction pd-cu drinking-water hydrogenation removal carbon tio2 acid |
| ISSN号 | 0013-936X |
| 其他题名 | Environ. Sci. Technol. |
| 中文摘要 | Catalytic nitrate reduction is a promising technology in groundwater purification. In this study, PdCu bimetallic catalysts supported on an industrial amorphous silica-alumina (ASA) were synthesized and used to simulate catalytic removal of nitrate in groundwater. The catalysts exhibited very high activity and the highest catalytic selectivity toward N(2)O and N(2) was 90.2%. The optimal Pd/Cu weight ratio was four. Relatively low reduction temperature was found benefit the catalytic stability and 300 degrees C was the appropriate reduction temperature during catalyst preparation. With an average particle size 5.4 nm, the metal particles were very uniformly distributed on the catalyst surface prepared with the codeposition method. This kept the catalyst more stable than the PdCu/Al(2)O(3) catalyst with larger metal particles. According to XRD, TEM, and XPS results, the metals maintained zero-valence but aggregated by about 2 nm during the denitration reaction, which caused gradual deactivation of the catalysts. Little leaching of Cu and Pd from the catalyst might also have a slightly negative impact to the stability of the catalysts. A simple treatment was found to redistribute the particles on the deactivated catalysts, and high catalytic activity was recovered after this process. |
| 英文摘要 | Catalytic nitrate reduction is a promising technology in groundwater purification. In this study, PdCu bimetallic catalysts supported on an industrial amorphous silica-alumina (ASA) were synthesized and used to simulate catalytic removal of nitrate in groundwater. The catalysts exhibited very high activity and the highest catalytic selectivity toward N(2)O and N(2) was 90.2%. The optimal Pd/Cu weight ratio was four. Relatively low reduction temperature was found benefit the catalytic stability and 300 degrees C was the appropriate reduction temperature during catalyst preparation. With an average particle size 5.4 nm, the metal particles were very uniformly distributed on the catalyst surface prepared with the codeposition method. This kept the catalyst more stable than the PdCu/Al(2)O(3) catalyst with larger metal particles. According to XRD, TEM, and XPS results, the metals maintained zero-valence but aggregated by about 2 nm during the denitration reaction, which caused gradual deactivation of the catalysts. Little leaching of Cu and Pd from the catalyst might also have a slightly negative impact to the stability of the catalysts. A simple treatment was found to redistribute the particles on the deactivated catalysts, and high catalytic activity was recovered after this process. |
| WOS标题词 | Science & Technology ; Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Engineering, Environmental ; Environmental Sciences |
| 研究领域[WOS] | Engineering ; Environmental Sciences & Ecology |
| 关键词[WOS] | NITRATE REDUCTION ; PD-CU ; DRINKING-WATER ; HYDROGENATION ; REMOVAL ; CARBON ; TIO2 ; ACID |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000289819400040 |
| 公开日期 | 2013-11-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6364]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 4.Georgia Inst Technol, Brook Byers Inst Sustainable Syst, Atlanta, GA 30332 USA |
| 推荐引用方式 GB/T 7714 | Xie, Yongbing,Cao, Hongbin,Li, Yuping,et al. Highly Selective PdCu/Amorphous Silica-Alumina (ASA) Catalysts for Groundwater Denitration[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2011,45(9):4066-4072. |
| APA | Xie, Yongbing,Cao, Hongbin,Li, Yuping,Zhang, Yi,&Crittenden, John C..(2011).Highly Selective PdCu/Amorphous Silica-Alumina (ASA) Catalysts for Groundwater Denitration.ENVIRONMENTAL SCIENCE & TECHNOLOGY,45(9),4066-4072. |
| MLA | Xie, Yongbing,et al."Highly Selective PdCu/Amorphous Silica-Alumina (ASA) Catalysts for Groundwater Denitration".ENVIRONMENTAL SCIENCE & TECHNOLOGY 45.9(2011):4066-4072. |
入库方式： OAI收割
来源：过程工程研究所
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