NAV
中文 DALIAN UNIVERSITY OF TECHNOLOGYLogin
Air Pollution Control and Resource Utilization Research Group
Paper
Current position: Home >> Research Results >> Paper
Hollow ZSM-5 zeolite encapsulated Ag nanoparticles for SO2-resistant selective catalytic oxidation of ammonia to nitrogen
Release time:2019-03-13 Hits:
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