Effects of SO2 on low-temperature SCR catalysts: Mechanisms and strategies

IF 6.2 2区工程技术 Q2 ENERGY & FUELS

Journal of The Energy Institute Pub Date : 2025-09-20 DOI:10.1016/j.joei.2025.102292

Litong Lu , Boxiong Shen , Chenguang Zhang , Xiaolan Zhao , Qiqi Shi , Ao Huang

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引用次数: 0

Abstract

With the acceleration of China's industrialization, nitrogen oxides (NO_x) emissions have increased significantly, becoming one of the major sources of environmental issues such as acid rain and the greenhouse effect. In response to this challenge, the Chinese government plans to reduce NO_x emissions by over 10 % by 2025. Selective Catalytic Reduction (SCR) technology, as an effective method for nitrogen removal, still faces numerous challenges when applied in environments with low temperatures, unstable gas flow, and complex gas compositions (such as water vapor (H₂O) and sulfur dioxide (SO₂)). This paper reviews the poisoning mechanisms of catalysts caused by SO₂, and proposes strategies to address these issues, including inhibiting SO₂ adsorption and oxidation, accelerating Ammonium hydrogen sulfate (ABS) decomposition, and pre-sulfurization of metal oxides. Furthermore, the paper explores methods to enhance catalyst performance by optimizing their formulation, morphology, and structure, providing theoretical support for the development of efficient SCR catalysts and promoting the sustainable development of NO_x control technologies.

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SO2对低温SCR催化剂的影响：机理与对策

随着中国工业化进程的加快，氮氧化物（NOx）排放量显著增加，已成为酸雨、温室效应等环境问题的主要来源之一。为了应对这一挑战，中国政府计划到2025年将氮氧化物排放量减少10%以上。选择性催化还原（SCR）技术作为一种有效的脱氮方法，在低温、气流不稳定和复杂气体成分（如水蒸气（H2O）和二氧化硫（SO2））的环境中应用仍然面临许多挑战。本文综述了SO2引起催化剂中毒的机理，并提出了抑制SO2吸附氧化、加速硫酸氢铵（ABS）分解、金属氧化物预硫化等对策。此外，本文还探索了通过优化催化剂的配方、形态和结构来提高催化剂性能的方法，为高效SCR催化剂的开发和促进NOx控制技术的可持续发展提供理论支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.