C4F7N/CO2 mixed gas

as a new insulating gas with the most potential to replace SF6

has a broad application prospect. However

the mixed gas of C4F7N/CO2 may decompose due to overheating or discharge during long-term operation

which will affect the safe operation of insulation equipment. In order to improve the operation level of insulation equipment

an experimental platform for thermal decomposition and adsorption was built

and the mixed gas

its decomposition components and adsorption rate were detected by gas chromatography-mass spectrometry and Fourier infrared spectrometer. Secondly

the adsorption mechanism was expounded by combining the software of Multiwfn and GaussView 6.0.16. Finally

molecular dynamics simulation was used to carry out the comparative study on Na modification of ZSM-5 molecular sieve and all-silicon model adsorption. It is found that the adsorption rates of ZSM-5 molecular sieve for CO2

C4F7N

C2F5CN

C3F6

C3F8

CF3CN and CF4 are not high before modification. After Na modification

the adsorption capacity of C3F8 and CF3CN is enhanced

but the adsorption capacity of CO2 is almost unaffected

which is beneficial to the separation of C4F7N/CO2 mixed gas and provides theoretical support for the subsequent research and development of new adsorbents.