Catalysts for fast and NO2 SCR reactions for the removal of nitrogen oxides emitted from various sources: Recent advances, mechanisms, and future directions

被引：7

作者：

Elkaee, Sahar ^{[1
]}

Kim, Seul Yi ^{[1
]}

Phule, Ajit Dattatray ^{[1
]}

Zaman, Md. Wahad Uz ^{[1
]}

Lee, Sang Gyu ^{[1
]}

Park, Gibeom ^{[2
]}

Yang, Jae Hwan ^{[1
,2
]}

机构：

[1] Chungnam Natl Univ, Dept Environm & IT Engn, 99 Daehak Ro, Daejeon 34134, South Korea

[2] Chungnam Natl Univ, Dept Environm Engn, 99 Daehak Ro, Daejeon 34134, South Korea

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2023年 / 11卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

Selective catalytic reduction; Fast SCR; NO; 2; SCR; NO x reduction; NH3-SCR; NITRIC-OXIDE; NH3-SCR REACTION; CU-ZEOLITE; SELECTIVE REDUCTION; FE-ZSM-5; CATALYSTS; DIESEL EXHAUSTS; ACTIVE-SITES; NH3; FE; AMMONIA;

D O I：

10.1016/j.jece.2023.111131

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The escalating severity of air pollution and climate-change issues has necessitated the development and implementation of effective pollution-control measures. Nitrogen oxides (NOx), primarily originating from the exhaust emissions of automobiles and industrial processes, contribute significantly towards the production of acid rain and photochemical smog. Fast and NO2 selective catalyst reduction (SCR) strategies (utilizing NH3 as the reducing agent) have gained prominence for the mitigation of NOx emissions. These strategies are preferred for their ability to operate effectively at low temperatures, minimize ammonia slip, and offer excellent durability. They find applications in a wide range of scenarios. Catalyst selection is vital in optimizing the efficiency of the conversion process. This review explores the prevalent fast and NO2 SCR catalysts, focusing on metal oxide and zeolite catalysts. It also provides an overview of the reaction mechanisms involved in fast and NO2 SCR, relevant to diverse catalyst types, along with the factors influencing their performance. Finally, it addresses the challenges encountered in fast and NO2 SCR catalyst technology, highlighting some essential aspects that warrant attention, and proposes future directions of research in this field.

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页数：14