Understanding the Active Sites of Ag/Zeolites and Deactivation Mechanism of Ethylene Catalytic Oxidation at Room Temperature
文献类型：期刊论文
| 作者 | Hao, Zhengping; Yang, Hongling ; Ma, Chunyan; Zhang, Xin; Li, Yang; Cheng, Jie
|
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2018-02-01 |
| 卷号 | 8期号:2页码:1248-1258 |
| 关键词 | ethylene low-temperature oxidation Ag zeolite deactivation |
| ISSN号 | 2155-5435 |
| 文献子类 | Article |
| 英文摘要 | Microporous Ag/zeolite (ZSM-5, Beta, Y, and Mordenite) catalysts were found to be potentially good catalytic materials for ethylene oxidation at room temperature. These catalysts were evaluated under both dry and humid atmospheres, achieving 100% conversion of 100 ppm of ethylene mineralized into CO2 at 25 degrees C. Moreover, the zeolite framework type and relative humidity had a significant effect on catalytic stability. Pyridine Fourier transform infrared spectra (FTIR) and solid-state hydrogen-1 (H-1) magic angle spinning nuclear magnetic resonance (MAS NMR) studies revealed that Bronsted acid sites were the active sites in Ag/zeolites; the deactivated Ag/zeolites had no available Bronsted acid sites. When the number of Bronsted acid sites of Ag/ZSM-5-humid and Ag/Beta-humid were reduced, the catalytic activities of Ag/ZSM-5-humid and Ag/Beta-humid decreased. Temperature-programmed oxidation mass spectrometry (TPO-MS) and water adsorption/desorption results indicated that H2O adsorbed on Bronsted acid sites led to the disappearance of available Bronsted acid sites and thus resulted in Ag/zeolite catalyst deactivation. An understanding of the active sites and deactivation mechanism in ethylene oxidation on zeolite catalysts is helpful in the synthesis of a better ethylene oxidation catalyst and development of an effective technology of eliminating trace ethylene. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41102]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Hao, Zhengping,Yang, Hongling,Ma, Chunyan,et al. Understanding the Active Sites of Ag/Zeolites and Deactivation Mechanism of Ethylene Catalytic Oxidation at Room Temperature[J]. ACS CATALYSIS,2018,8(2):1248-1258. |
| APA | Hao, Zhengping,Yang, Hongling,Ma, Chunyan,Zhang, Xin,Li, Yang,&Cheng, Jie.(2018).Understanding the Active Sites of Ag/Zeolites and Deactivation Mechanism of Ethylene Catalytic Oxidation at Room Temperature.ACS CATALYSIS,8(2),1248-1258. |
| MLA | Hao, Zhengping,et al."Understanding the Active Sites of Ag/Zeolites and Deactivation Mechanism of Ethylene Catalytic Oxidation at Room Temperature".ACS CATALYSIS 8.2(2018):1248-1258. |
入库方式： OAI收割
来源：生态环境研究中心
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