Insight into the properties of MnO2-Co3O4-CeO2 catalyst series for the selective catalytic reduction of NOx by C3H6 and NH3

被引：23

作者：

Le, Minh Thang ^{[1
]}

Singh, Sharanjit ^{[1
]}

Nguyen-Quang, Minh ^{[1
]}

Ngo, Anh Binh ^{[2
]}

Bruckner, Angelika ^{[2
]}

Armbruster, Udo ^{[2
]}

机构：

[1] Hanoi Univ Sci & Technol, Sch Chem Engn, Dept Organ & Petrochem Technol, 1 Dai Co Viet, Hanoi 10000, Vietnam

[2] Leibniz Inst Catalysis, Albert Einstein Str 29a, D-18059 Rostock, Germany

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2021年 / 784卷

关键词：

Selective catalytic reduction; Manganese-cobalt-cerium metal oxides; Nitrogen oxides; In-situ FTIR; Redox shuttle; LOW-TEMPERATURE NH3-SCR; MIXED-OXIDE CATALYST; SUPPORT MODIFICATION; PERFORMANCE; MECHANISM; OXIDATION; CO; ADSORPTION; MNOX-CEO2; CERIA;

D O I：

10.1016/j.scitotenv.2021.147394

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A series of MnO2-Co3O4-CeO2 catalysts with different ceria loading (0.75, 1.26 and 1.88 Ce/Mn molar ratio) were synthesized by a co-precipitation technique and the catalytic activity was tested for selective catalytic reduction of NOx by C3H6 or NH3. The catalysts were characterized by various physicochemical techniques to examine the effect of ceria loading on the properties of catalysts, such as crystallinity of metal species, surface area, porosity, and acidity using physical adsorption analysis, SEM-EDX, H-2-TPR, XRD, NH3-TPD and in-situ FTIR spectroscopy. Ceria loading had a significant effect on the reduction of NOx, with the catalyst having low amount of ceria loading (Ce/Mn = 0.75) showing excellent performance at low-temperature conditions, but the activity declined at higher temperature. The high ceria loading (Ce/Mn = 1.88) catalyst showed poor activity compared to the counterparts owing to the lower number of acid sites and the resulting lower adsorption capacity. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：9

共 46 条

[1] Novel promotional effect of yttrium on Cu-SAPO-34 monolith catalyst for selective catalytic reduction of NOX by NH3 (NH3-SCR) [J].