Promoting Zeolite NaY as Efficient Nitrosamines Trap by Cobalt Oxide Modification
Promoting Zeolite NaY as Efficient Nitrosamines Trap by Cobalt Oxide Modification
复制标题
DOI：
10.1021/jp064978f
复制
发表时间：
2007
影响因子：
3.7
通讯作者：
Yi Cao;T. Zhuang;Jing Yang;H. Liu;Wei Huang;J. Zhu
中科院分区：
文献类型：
--
作者：
Yi Cao;T. Zhuang;Jing Yang;H. Liu;Wei Huang;J. Zhu
为了开发一种新型高效的亚硝胺捕捉剂，采用不同的方法制备了氧化钴掺杂NaY分子筛样品，并用X-射线衍射仪、差示扫描量热法和H2-−-TPR技术对样品进行了表征。考察了制备对NaY沸石中钴物种分散和分布的影响，包括钴氧化物从沸石方钠石笼中的迁移。对N-亚硝基吡咯烷(NPYR)的吸附实验表明，合适的负载量和焙烧温度对NaY沸石的性能有影响，并揭示了3CoY样品的两个性质：338K时的最大吸附容量和对亚硝胺的潜在可逆吸附。热重分析-质谱分析(TG-MS)结果表明，钴改性NaY沸石在较低的温度下对NPYR的降解具有较高的催化活性。
To develop a new trapper of nitrosamines with high efficiency, cobalt oxide incorporated zeolite NaY samples were prepared by different methods and characterized by XRD, DRS, and H2−TPR techniques. The influence of preparation on the dispersion and distribution of cobalt species in NaY zeolite were examined, involving the migration of cobalt oxide from the sodalite cage of zeolite. An adsorption experiment of N-nitrosopyrrolidine (NPYR) indicated the impact of appropriate loading amount and calcination temperature on the capability of zeolite NaY and revealed two properties of the 3CoY sample: the highest adsorptive capacity at 338 K and the potential reversible adsorbent of nitrosamines. As revealed by thermogravimetric analysis-mass spectroscopy (TG-MS) results, cobalt-modified zeolite NaY had high activity to catalyze the degradation of NPYR at relatively low temperature.