A Comparative Study on the Effect of Surface and Bulk Sulfates on the High-Temperature Selective Catalytic Reduction of NO with NH3 over CeO2-Reference-Cited by-同舟云学术

A Comparative Study on the Effect of Surface and Bulk Sulfates on the High-Temperature Selective Catalytic Reduction of NO with NH3 over CeO2

Published:2023-07-28 Issue:8 Volume:13 Page:1162
ISSN:2073-4344
Container-title:Catalysts
language:en
Short-container-title:Catalysts

Author:

Tan Chong¹,Gu Zhiwen¹,Sin Songil¹,Ji Jiawei²,Wang Yan¹,Zhu Baiyun¹,Cheng Lijun¹,Huang Chunkai¹,Li Lulu³,Zhang Hongliang⁴,Tang Changjin¹⁵

Affiliation:

1. School of Environment, Nanjing Normal University, Nanjing 210023, China

2. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China

3. College of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, China

4. Analysis and Testing Central Facility, Anhui University of Technology, Ma’anshan 243002, China

5. Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing 210023, China

Abstract

Herein, two CeO2 samples dominantly decorated with surface and bulk sulfates were constructed and their distinct effects on high-temperature NH3-SCR were investigated by strictly controlling the sulfate content at a comparable level. The obtainment of surface and bulk sulfates was revealed using a designed leaching experiment, and further evidenced by the characterization results from XPS and H2-TPR. In comparison with CeO2 modified with bulk sulfates (B-CeS), sufficient acid sites with strong intensity were generated on CeO2 modified with surface sulfates (S-CeS). In addition, due to electron-withdrawing effect from S=O in sulfate species, NH3 oxidation over S-CeS was greatly suppressed, providing an additional contribution to enhanced performance in high-temperature NH3-SCR.

Funder

National Science Foundation of China

Major Scientific and Technological Project of Bingtuan

Publisher

MDPI AG

Subject

Physical and Theoretical Chemistry,Catalysis,General Environmental Science

Link

https://www.mdpi.com/2073-4344/13/8/1162/pdf

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