The potent greenhouse gas SF_(6)is widely used in the field of high-voltage power insulation due to its excellent insulating properties.Currently,over 80%of the SF_(6)produced globally each year is applied in the powe...The potent greenhouse gas SF_(6)is widely used in the field of high-voltage power insulation due to its excellent insulating properties.Currently,over 80%of the SF_(6)produced globally each year is applied in the power industry,and thousands of tons of SF_(6)gas are decommissioned annually.Therefore,the treatment of SF_(6)waste gas has become an urgent issue that needs to be addressed.The harmless degradation of SF_(6)can fundamentally resolve the disposal issue of SF_(6)waste gas.This paper summarizes three primary degradation methods:thermal(catalytic)degradation,photocatalytic degradation,and plasma degradation,and reviews the research progress of emerging degradation and conversion technologies.In addition,this paper comprehensively discusses the advantages,disadvantages,and industrial application potential of various technologies from the perspectives of SF_(6)degradation efficiency and regulation of harmless product.It also analyzes the physical and chemical properties of various SF_(6)degradation products and their harmless treatment methods.A review of research shows that existing SF_(6)degradation technologies cannot meet the complex and diverse waste gas disposal needs in the power industry.There are still many challenges in balancing SF_(6)degradation indicators,differentiated response to degradation needs,recovery and economy of degradation products,treatment standards and evaluation mechanisms,and industry guidance policies.In the future,multi-means collaborative degradation methods,new reactor design and treatment process optimization,research on SF_(6)degradation reaction mechanism,and efficient catalyst design and development will serve as potential development directions.展开更多
基金supported by National Natural Science Foundation of China Joint Fund(U24B2096)National Natural Science Foundation of China(52307170)Natural Science Foundation of Hubei Province,China(No.2023AFB382).
文摘The potent greenhouse gas SF_(6)is widely used in the field of high-voltage power insulation due to its excellent insulating properties.Currently,over 80%of the SF_(6)produced globally each year is applied in the power industry,and thousands of tons of SF_(6)gas are decommissioned annually.Therefore,the treatment of SF_(6)waste gas has become an urgent issue that needs to be addressed.The harmless degradation of SF_(6)can fundamentally resolve the disposal issue of SF_(6)waste gas.This paper summarizes three primary degradation methods:thermal(catalytic)degradation,photocatalytic degradation,and plasma degradation,and reviews the research progress of emerging degradation and conversion technologies.In addition,this paper comprehensively discusses the advantages,disadvantages,and industrial application potential of various technologies from the perspectives of SF_(6)degradation efficiency and regulation of harmless product.It also analyzes the physical and chemical properties of various SF_(6)degradation products and their harmless treatment methods.A review of research shows that existing SF_(6)degradation technologies cannot meet the complex and diverse waste gas disposal needs in the power industry.There are still many challenges in balancing SF_(6)degradation indicators,differentiated response to degradation needs,recovery and economy of degradation products,treatment standards and evaluation mechanisms,and industry guidance policies.In the future,multi-means collaborative degradation methods,new reactor design and treatment process optimization,research on SF_(6)degradation reaction mechanism,and efficient catalyst design and development will serve as potential development directions.
