Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications

Abstract

The usage and emission of SF 6 has been regulated because of high Global Warming Potential (GWP) and long atmospheric lifetime as an insulator in high voltage power transmission equipment. This paper proposes cC 4 F 8 O and its mixtures as a substitute for SF 6 with low GWP and superior insulation performance. cC 4 F 8 O is synthesized by 1,4-diiodoperfluorobutane and fuming sulfuric acid with the yield of 55.7% under optimal conditions. The GWP of cC 4 F 8 O is about one-third that of SF 6 and its dielectric strength is about 1.2-1.4 times that of SF 6. CO 2 and N 2 are mixed with cC 4 F 8 O to lower liquefaction temperature and GWP. The investigation of breakdown voltage and self-recoverability of gas mixtures has shown that the insulation performance and stability of cC 4 F 8 ON 2 is better than cC 4 F 8 O-CO 2 mixtures. The decomposition process of cC 4 F 8 O might produce some nonflammable or inexplosive by-products, such as C 2 F 4 , cC 2 F 4 O, cC 3 F 6 and CF 2 O simulated by Gaussian 09. The results indicate that cC 4 F 8 O and N 2 mixtures have potential to replace SF 6 in electrical equipment. INDEX TERMS Synthesis, perfluorotetrahydrofuran, insulation performance, sulfur hexafluoride substitutes.

Electron induced elastic and inelastic processes for perfluoroketone (PFK) molecules

“…We observed the sensitivity of Q ION with the IP and found linear relation for Q ION (peak) with N in absence of much deviation in IP for these targets (figure 17). We also correlated the Q ION (peak) with IP and polarizability (figures [18][19] and observe the linear relation as predicted by Bart et al [48]. Using these correlation analyses we predicted the dipole polarizability for C x F 2x O (x = 2, 5, 6) and found that our predicted polarizabilities are in excellent agreement with those computed using online software www.chemspider.com.…”

Investigation on insulation properties of HFO‐1336mzz(E) and N 2 /CO 2 mixtures as SF 6 substitutes in gas‐insulated electrical applications

“…Figure 3 shows the device of power frequency breakdown. The effectiveness of the breakdown device has been verified in references [20,21]. The cavity mainly includes a stainless-steel base, silica glass, gas filling valve and electrode spacing adjustment screw.…”

“…Luo's group is committed to the development of the insulating gas [19][20][21][22]. In our recent study, the trans-1,1,1,4,4,4hexafluoro-2-butene (HFO-1336mzz(E), CF 3 -CH=CH-CF 3 ) is proposed as a potential insulating medium.…”

The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF₆ for Medium Voltage Switchgear

“…The quest for substitute gases represents a crucial stride toward realizing a sustainable energy prospect. Substituting SF6 with alternative gases can reduce the ecological footprint of highvoltage applications and positively contribute to climate change amelioration [14,15]. Conventional gases such as dry air, nitrogen, carbon dioxide, or mixtures exhibit a lower global warming potential than SF6, but their dielectric strength is limited to only 40% or less [16].…”