Recent progress of Pd/zeolite as passive NOx adsorber: Adsorption chemistry, structure-performance relationships, challenges and prospects

被引：35

作者：

Bian, Ce ^{[1
]}

Li, Dan ^{[1
]}

Liu, Qian ^{[1
]}

Zhang, Shoute ^{[1
]}

Pang, Lei ^{[2
]}

Luo, Zhu ^{[3
]}

Guo, Yanbing ^{[3
]}

Chen, Zhen ^{[1
]}

Li, Tao ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Hubei Key Lab Mat Chem & Serv Failure, Key Lab Mat Chem Energy Convers & Storage,Minist, Wuhan 430074, Peoples R China

[2] DongFeng Trucks R&D Ctr, Wuhan 430056, Peoples R China

[3] Cent China Normal Univ, Coll Chem, Inst Environm & Appl Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2022年 / 33卷 / 03期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Emission control; Pd/zeolite; Passive NOx adsorber; NOx storage; Cold start; SELECTIVE CATALYTIC-REDUCTION; ZEOLITE-SUPPORTED PD; OF-THE-ART; LOW-TEMPERATURE; SI/AL RATIO; FUTURE CHALLENGES; EMISSION CONTROL; NH3-SCR REACTION; USY ZEOLITE; PD/SSZ-13;

D O I：

10.1016/j.cclet.2021.07.066

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Due to the technology limitation and inferior deNO(x) efficiency of urea selective catalytic reduction (SCR) catalysts at low temperatures, passive NOx adsorber (PNA) for decrease of NOx, CO and hydrocarbons (HCs) during "cold start" of vehicles was proposed to meet the further tighten NOx emission regulations in future. Among them, Pd modified zeolite PNA materials have received more attention because of their excellent NOx storage capacity, anti-poisoning and hydrothermal stability and since Pd/zeolite PNA was proposed, a variety of advanced characterization methods have been applied to investigate its adsorption behavior and structure-performance relationship. The comprehension of the active sites and adsorption chemistry of Pd/zeolite PNA was also significantly improved. However, there are few reviews that systematically summarize the recent progress and application challenges in atomic-level understanding of this material. In this review, we summarized the latest research progress of Pd/zeolite PNA, including active adsorption sites, adsorption mechanism, material physicochemical properties, preparation methods, storage and release performance and structure-performance relationships. In addition, the deactivation challenges faced by Pd/zeolite PNA in practical applications, such as chemical poisoning, high temperature hydrothermal aging deactivation, etc., were also discussed at the micro-level, and some possible effective countermeasures are given. Besides, some possible improvements and research hotspots were put forward, which could be helpful for designing and constructing more efficient PNA materials for meeting the ultra-low NOx emission regulation in the future. (C) 2021 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

引用

页码：1169 / 1179

页数：11

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