SF

6

has a high global warming potential（GWP）

and will be harmful to the environment if the SF

6

is discharged into the atmosphere without treatment. The SF

6

is more extensively applied in the power industry and the exhaus

t emissions are also increasing rapidly. In order to reduce the environmental pollution of SF

6

exhaust gas in power industry

we designed a set of experimental platform based on the catalytic effect of TiO

2

surface under ultraviolet irradiation to study the effects of different amounts of TiO

2

and H

2

O participation on the degradation of high concentrations of SF

6

at normal temperature and pressure. At the same time

the process of catalytic decomposition of SF

6

gas molecule on TiO

2

surface was analyzed by simulation. The results show that TiO

2

as a catalyst

can effectively increase the degradation rate of SF

6

.The degradation rate of SF

6

after ultraviolet irradiation for 3 hours in the absence of TiO

2

was only 1.25% and the degradation rate reached 8.98% with 8 pieces of TiO

2

added

and the main degradation products were SO

2

F

2

SiF

4

SF

4

and SO

2

. Besides

H

2

O addition in SF

6

gas can increase the degradation rate to 27.22%. The main degradation products are SO

2

F

2

SiF

4

SF

4

SiH

4

HF

and SO

2

. The simulation calculation results show that the TiO

2

catalytic degradation of SF

6

is to subdivide the required energy into several small energy absorption processes which explains the advantages of TiO

2

catalytic degradation of SF

6

from the perspective of energy absorption. The study can provide a reference for the degradation of SF

6

.