Indexed by:
期刊论文
First Author:
Wang, Zhong
Correspondence Author:
Wang, Z; Li, XB (reprint author), Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China.
Co-author:
Sun, Qiang,Wang, Da,Hong, Zhe,Qu, Zhenping,Li, Xuebing
Date of Publication:
2019-01-31
Journal:
SEPARATION AND PURIFICATION TECHNOLOGY
Included Journals:
SCIE
Document Type:
J
Volume:
209
Page Number:
1016-1026
ISSN No.:
1383-5866
Key Words:
Selective catalytic oxidation of ammonia; Hollow ZSM-5; Ag-0 species;
Metal-encapsulated
Abstract:
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.
Translation or Not:
no