Recent advances in the research on the poisoning mechanisms and anti-poisoning methods of alkali (earth) metal for denitrification catalysts
Journal Title: Energy Environmental Protection - Year 2024, Vol 38, Issue 4
Abstract
As a by-product of many combustion processes, NO_x has long affected the environment and human health. In order to reduce NO_x emissions at the source, selective catalytic reduction (SCR) denitrification technology has been widely used due to its high efficiency and mature technology characteristics. However, the alkali and alkaline earth metals generated during the combustion process can adversely affect the SCR catalysts, resulting in a decrease in its denitrification efficiency. Therefore, it is important to study the poisoning mechanisms of alkali metals on SCR catalysts and develop effective anti-poisoning strategies to extend the catalyst lifespan and reduce operational costs. This paper systematically examines the poisoning mechanisms of alkali metals on various SCR catalysts, concluding that alkali metals mainly affect the catalyst performance through chemical and physical poisoning processes. Additionally, an overview is provided on research progress in catalyst modification, rational catalyst structure design, and effective use of catalyst carriers to enhance the resistance of SCR catalysts against alkali metal poisoning. Considering real-world catalyst application scenarios, the paper also explains the joint poisoning effects of alkali metals, SO_2, heavy metals and other components in flue gas on catalysts, while prospecting for future research on synergistic catalyst resistance.
Authors and Affiliations
TANG Yuxuan|School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China, WANG Kaixin|School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China, WANG Yuhe|School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China, LIU Caixia|School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China, WANG He|Tianjin TEDA Environmental Protection Co., Ltd., Tianjin 300457, China, WANG Tianhao|Tianjin TEDA Environmental Protection Co., Ltd., Tianjin 300457, China, LI Zhiyong|Tianjin TEDA Environmental Protection Co., Ltd., Tianjin 300457, China, YANG Wenjuan|Tianjin TEDA Environmental Protection Co., Ltd., Tianjin 300457, China, CHEN Yanguo|Tianjin TEDA Environmental Protection Co., Ltd., Tianjin 300457, China, ZHANG Yawei|Tianjin TEDA Environmental Protection Co., Ltd., Tianjin 300457, China, LI Haibo|Tianjin TEDA Environmental Protection Co., Ltd., Tianjin 300457, China, LIU Qingling*|School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
Keywords
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- EP ID EP743130
- DOI 10.20078/j.eep.20240615
- Views 36
- Downloads 0
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