Study on Adsorption Characteristics of C6F12O/CO2 Mixed Gas Superheated Decomposition Products by 13X Molecular Sieve and Activated Alumina

Abstract

C6F12O environmentally friendly insulating medium will decompose due to discharge and overheating failure. If the decomposition products are not adsorbed, it will pose a threat to the safety of equipment and personnel. In this paper, adsorption experiments were conducted to explore the adsorption effect of 13X molecular sieve and γ-Al2O3 on C6F12O superheated decomposition gas. The experimental results show that the pyrolysis products are C2F6, C3F8, C4F10, C3F6, C3F7H, C5F12, and C6F14. Both 13X molecular sieve and γ-Al2O3 have strong adsorption effect on C6F12O in the original gas. Through the adsorption experiment of standard gas, it can be seen that the adsorption effect of 13X molecular sieve on the common fluorocarbon decomposition products C3F7H, C3F6, and C3F8 gas is obvious, the adsorption rate is more than 70%, and the adsorption effect on C3F7H gas is 98.4%. The adsorption effect of γ-Al2O3 on C2F6, C3F7H, C3F6 and C3F8 was poor, and the highest adsorption rate was only 31.8%. Since 13X molecular sieve and γ-Al2O3 have strong adsorption effect on the main insulating gas C6F12O, both 13X molecular sieve and γ-Al2O3 are difficult to be used as adsorbents for C6F12O environmentally friendly insulating medium, but they can be used for the treatment of new environmentally friendly insulating medium tail gas treatment.