SF_(6)废气无害化降解研究综述

Review on Harmless Abatement of SF_(6)Waste Gas

在“双碳”背景下,SF_(6)无害化降解是实现故障、退役气体回收减排的有效途径。该文总结热(催化)降解、光催化降解与等离子体降解3种主流方法及新兴降解技术的研究进展,并且从降解速率、能量效率以及产物调控3个角度剖析各类技术的内在缺陷与工业化应用潜力,讨论SF_(6)降解产物的理化性质及其回收处理方法。综述研究表明,已有的降解技术难以满足我国电力工业中复杂多样的降解需求,在降解指标平衡、降解需求差异化响应、降解产物回收与经济性、处理标准与评估机制以及行业指导政策等方面仍存在诸多问题。在未来,多手段协同降解方法、反应器设计与处理流程优化以及SF_(6)降解反应机理的研究将是潜在的发展方向。

With the national demands of carbon peak and carbon neutrality,the harmless abatement of SF_(6)is of great importance for its waste gas reduction.This review introduces the research progress of three main degradation methods,i.e.,thermal(catalysis)degradation,photo-catalysis degradation,and plasma degradation,as well as the emerging degradation technologies.The inherent defects and industrial application potentials of each technology are analyzed from three perspectives:degradation rate,energy efficiency and product regulation.The physicochemical properties of SF_(6)degradation products and their recycling methods are comprehensively analyzed.The review shows that the existing technologies can hardly meet the complex and diverse degradation demands in the power industry.There are still many key issues to be solved in the areas of the balance of degradation demands,differentiated response to degradation treatment,economic evaluation,product recovery,treatment standards,guiding policies,etc.In the future,studies on synergistic degradation methods,reactor design,process optimization and SF_(6)degradation mechanism will be potential directions.