Catalytic Ozonation of NO with Low Concentration Ozone over Recycled SAPO-34 Supported Iron Oxide

被引：19
作者：
Liu, Bing [1 ]
Xu, Xiaochen [1 ]
Liu, Lifen [1 ]
Dai, Wenchen [1 ]
Jiang, Hongbin [1 ]
Yang, Fenglin [1 ]
机构：
[1] Dalian Univ Technol, Sch Environm Sci & Technol, China Minist Educ, Key Lab Ind Ecol & Environm Engn, Linggong Rd 2, Dalian 116024, Peoples R China
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2019年 / 58卷 / 04期
基金：
中国国家自然科学基金;
关键词：
HYDROXYL RADICALS; OXYGEN VACANCIES; VISIBLE-LIGHT; XPS SPECTRA; REMOVAL; CU; OXIDATION; FE; PERFORMANCE; CU/SAPO-34;
D O I：
10.1021/acs.iecr.8b04941
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A series of SAPO-34 supported iron oxide (FeOx/SAPO-34) catalysts were prepared by a two-step liquid ion-exchange method. The effects of the exchange time and iron nitrate concentration on the structure and properties of the catalysts were investigated. The results showed that the FeOx/SAPO-34 catalysts significantly enhanced the ozonation of NO. The 0.05-FeOx/SAPO-34-15 catalyst prepared by mixing NH4+/SAPO-34 with 0.05 M iron nitrate solution for 15 h showed the most effective NO oxidation. Oxygen vacancies acted as the active sites for the catalytic oxidation of NO. The electron paramagnetic resonance results showed that the hydroxyl and superoxide radicals generated from ozone and the oxygen vacancies on the surface of the catalysts promoted the oxidation of NO. The 0.05-FeOx/SAPO-34-15 catalyst has a certain stability when the volume fraction of water vapor is in the range 0-8%.
引用
收藏
页码：1525 / 1534
页数：10
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