SF

6

is used widely in power equipment due to its excellent insulation and arc interruption performance.However

SF

6

is a kind of typical greenhouse gas and cannot be exhausted at will.The

greenhouse effect caused by SF

6

waste gas can be effectively eliminated by thermal catalytic degradation.In this paper

zirconium phosphate

alu-minum phosphate and calcium phosphate are used as catalysts to degrade SF

6

at 800℃（the volume ratio is 15%SF

6

and the background gas is air）so to analyze the degradation rates of SF

6

under different catalysts and measure thedegradation products.It is found by the study that the common degradation products of the three catalysts includeSO

2

F

2

SOF

2

and SO

2

gas

in which the production of SO

2

gas is the most and the concentration exceeds the upper lim-it of GCMS detection.The catalytic effect of calcium phosphate is the best.The degradation rate of SF

6

gas reaches100%within 8 hours

the concentration of SO

2

F

2

and SOF

2

gas generated by the degradation reaches the maximum at2 hours

the generated concentration of H

2

S gas reaches 211μL/L at 8 hours and

at the same time

the microamount of CF

4

gas and SOF

4

gas are produced.When zirconium phosphate and aluminum phosphate are used as cat-alysts

they have promotion function for the formation of SO

2

F

2

gas

and the formation effect of zirconium phosphateon SO

2

F

2

gas is stronger than that of aluminum phosphate.It is shown by the study that the phosphate as catalyst canpromote the thermal decomposition of SF

6

gas

and the catalytic effect of calcium phosphate is higher than that ofaluminum phosphate and zirconium phosphate.SO

2

gas is one of the final products of SF

6

gas thermal decomposition.It is detected by test that most of the decomposed products are acidic gas

which can be filtered out by alkaliliquor.It is of great significance to reduce the greenhouse gases caused by SF

6

emissions.