Deactivation effect of different Pb salts over Fe/Zr-W catalyst for selective catalytic reduction of NO with NH3

IF 5.6 2区工程技术 Q2 ENERGY & FUELS

Journal of The Energy Institute Pub Date : 2025-04-01 DOI:10.1016/j.joei.2025.102087

Liang Wang , Shan Ren , Xiaodi Li , Chi He , Chunli Zheng , Xinzhe Li , Shouning Chai , Chunbao Charles Xu

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Abstract

Deactivation on NH₃-SCR catalyst surface by heavy metal species continues to hinder it long-term usage lifetime in flue gas treatment. A deeper insight into the poisoning effect of different Pb species on catalysts is crucial for designing denitrification catalysts with anti-Pb property. Herein, the obtained Fe/Zr-W catalyst was modified through multiple Pb salts (Pb(NO₃)₂, PbCl₂, and PbSO₄) to assess the different impact caused by various Pb species. The results showed that different Pb species led to varying levels of catalyst deactivation. Pb(NO₃)₂ and PbCl₂ caused different degrees of deactivation in the Fe/Zr-W catalyst, associated with the decrease in redox cycling capacity, acidic sites, and surface adsorption oxygen. However, PbSO₄ inversely enhanced the acidic site density of catalyst, which favored NH₃ adsorption but significantly decreased the conversion selectivity in catalytic process. Possible deactivation pathway differentiation among Pb salts over Fe/Zr-W catalyst was established. This work revealed insights into the different poisoning pathway of various Pb salts, contributing to the development of denitration catalysts with enhanced Pb tolerance.

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来源期刊

Journal of The Energy Institute 工程技术-能源与燃料

CiteScore

10.60

自引率

5.30%

发文量

166

审稿时长

16 days

期刊介绍： The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include: Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies Emissions and environmental pollution control; safety and hazards; Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS; Petroleum engineering and fuel quality, including storage and transport Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems Energy storage The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.