电力科技与环保2025，Vol.41Issue(3)：343-356,14.DOI:10.19944/j.eptep.1674-8069.2025.03.001
高温SCR脱硝研究进展:从催化剂到反应机理
Research progress in high-temperature SCR denitration:from catalyst innovations to reaction mechanism exploration
摘要
Abstract
[Objective]To meet the strict pollution control requirement for treating flue gas in scenarios like gas turbines and coalbed methane power generation,the development of efficient SCR catalysts that can perform well under high temperatures(>500℃)becomes very urgent,mainly due to the evident activity loss caused by serious sintering and aggravated NH3 over-oxidation for the commercial catalysts of V2O5-TiO2.[Methods]A systematic review was conducted on two categories of high-temperature catalysts:zeolite-based and metal oxide-based.Preparation methods,performance optimization strategies,and reaction mechanisms were analyzed.In-situ FTIR and poisoning resistance experiments were employed to investigate NH3-SCR pathways,hydrothermal stability,and resistance to sulfur/alkali metal poisoning under high temperatures.[Results]For zeolite-based catalysts,Fe/SSZ-13 and Cu-SSZ-13 exhibited outstanding performance due to isolated metal sites and synergistic acid-redox properties.Among oxide-based catalysts,WO3-FeOx and sulfated CeO2 achieved high efficiency by enhancing surface acidity,oxygen vacancies,and suppressing NH3 oxidation.Poisoning resistance studies revealed that ZrO2 doping improved sulfur tolerance,while Ce doping mitigated alkali metal poisoning.[Conclusion]Zeolite-and oxide-based catalysts demonstrate potential for high-temperature denitration,yet require further optimization in anti-deactivation mechanisms.Future research should focus on elucidating microstructural degradation under high temperatures;dynamic sulfur salt behavior and alkali metal trapping strategies;multi-pollutant synergistic control and practical adaptation of monolithic catalysts.关键词
烟气脱硝/高温催化剂/分子筛/金属氧化物/反应机理/抗中毒Key words
NOx removal/high-temperature catalyst/zeolite/metal oxide/reaction mechanism/resistance to deactivation分类
能源与动力引用本文复制引用
王瑜,唐添发,周沁宇,许璐,汤常金..高温SCR脱硝研究进展:从催化剂到反应机理[J].电力科技与环保,2025,41(3):343-356,14.基金项目
国家自然科学基金项目(22276097) （22276097）
国家自然科学基金项目(52300132) （52300132）
江苏省杰出青年基金项目(BK20230007) （BK20230007）
低碳智能燃煤发电与超净排放全国重点实验室开放项目(D2023FK095) （D2023FK095）
江苏省研究生科研与实践创新计划项目(SJCX25_0690) （SJCX25_0690）
