Hollow ZSM-5 zeolite encapsulated Ag nanoparticles for SO2-resistant selective catalytic oxidation of ammonia to nitrogen
发表时间：2019-03-13
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- 论文类型：
- 期刊论文
- 第一作者：
- Wang, Zhong
- 通讯作者：
- Wang, Z; Li, XB (reprint author), Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China.
- 合写作者：
- Sun, Qiang,Wang, Da,Hong, Zhe,Qu, Zhenping,Li, Xuebing
- 发表时间：
- 2019-01-31
- 发表刊物：
- SEPARATION AND PURIFICATION TECHNOLOGY
- 收录刊物：
- SCIE
- 文献类型：
- J
- 卷号：
- 209
- 页面范围：
- 1016-1026
- ISSN号：
- 1383-5866
- 关键字：
- Selective catalytic oxidation of ammonia; Hollow ZSM-5; Ag-0 species; Metal-encapsulated
- 摘要：
- Hollow ZSM-5 encapsulating Ag particles (Ag/ZSM-5-OH) have been successfully synthesized, characterized and tested in NH3-SCO reaction. In comparison with Ag/Al2O3 and Ag/ZSM-5-OH, Ag/ZSM-5 catalyst displayed the lowest T-100 (110 degrees C), much higher TOF and the lowest E-a. Although fresh Ag/ZSM-5-OH catalyst showed the relatively low NH3 conversion, its reaction cycles stability was significant higher than that of Ag/Al2O3 and Ag/ ZSM-5 catalysts. The hollow structure of ZSM-5 zeolite could prevent sintering and/or leaching of Ag particles during NH3 oxidation process. Zeolite membrane formed during dissolution-recrystallization process in the surface of hollow ZSM-5 could offer good separation properties for SO2. So SO2 did not diffuse into the hollow structure to be poisoned Ag catalyst, finally induced the outstanding SO2/H2O resistance.
- 是否译文：
- 否
