Shock Wave Study of the Thermal Dissociations of C3F6and c-C3F6. I. Dissociation of Hexafluoropropene

Cobos, Carlos; Sölter, L.; Tellbach, E.; Troe, J.

doi:10.1021/jp501569a

Cited by 16 publications

(34 citation statements)

References 38 publications

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“…Inhaling too much C 3 F 6 at a short time may cause dizziness, weakness, poor sleep, and other symptoms. 36 In addition, CO is a common toxic gas that needs prevention. The proportion of C 5 F 10 O accounted for about 10% of all the gas mixtures, which is far lower than the content of industrial production and thus will not pose a greater harm to the human body.…”

Section: Toxicity Of Decomposition Products In the Presence Of Micro-mentioning

confidence: 99%

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

Xiao

Zhang

et al. 2017

AIP Advances

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SF6 is widely used in all kinds of high-voltage electrical equipment because of its excellent insulation and arc-extinguishing performance. However, this compound leads to serious greenhouse effect, which harms the environment. Many research institutions are now actively in search of SF6 alternative gas. C5F10O has attracted much attention as an alternative gas with low global warming potential (GWP) and excellent dielectric strength. In this paper, we analyzed the possible decomposition paths of C5F10O under micro-water environment through density functional theory. We also evaluated the ionization parameters and toxicity of the decomposition products. The results show that OH• and H• produced by H2O exhibited a catalytic effect on the decomposition of C5F10O. CF4, C2F6, C3F6, C3F8, C4F10, C5F12, C6F14, C3F7COH, C3F7OH, CF3COH, C3F7H, and CF3OH were produced in the micro-water environment. Based on molecular configuration calculation, the ionization parameters of these products were inferior to perfluorocarbons, such as C3F8, leading to reduced insulation performance of the system. Moreover, CF2O and HF are hazardous to human health and equipment safety. Results will provide a basis for further study of the insulation characteristic of the C5F10O gas mixture under micro-water condition to guide the formulation of their relevant international standards prior to engineering applications.

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Section: Toxicity Of Decomposition Products In the Presence Of Micro-mentioning

confidence: 99%

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

Xiao

Zhang

et al. 2017

AIP Advances

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“…The broadening parameter F cent was set equal to 0.5 as recommended for an atom + nonlinear system . Figure shows the fit to Eq.…”

Section: Resultsmentioning

confidence: 99%

The Spin‐Forbidden Reaction of Ground‐State Sulfur Atoms with Ethylene

Thompson

Gao

Marshall

2016

Int. J. Chem. Kinet.

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Ground‐state S‐atoms (3PJ) were generated by pulsed laser photolysis of carbonyl sulfide (OCS) precursor and monitored by time‐resolved resonance fluorescence. The kinetics were studied over the temperature range of 291–1052 K. Below 900 K, the effective bimolecular rate constant k1 was found to be independent of pressure and also to be in good accord with prior measurements made at 442 K and below. At higher temperatures, fall‐off curves were characterized. These demonstrate that the reaction is dominated by addition. The high‐pressure limit is summarized as k∞ = 1.5 × 10−11 exp(−8.4 kJ mol−1/RT) cm3 molecule−1 s−1. The low‐pressure limiting rate constant is also obtained. The observation of formation of one or more adducts even at ∼1000 K constrains their thermochemistry, and comparison with the computed reaction enthalpies for various candidates in the literature shows the addition products can only be accessed via intersystem crossing. Estimated Rice–Ramsperger–Kassel–Marcus (RRKM) addition rate constants at the low‐pressure limit for formation of vinylthiol and ethanethial are in accord with the observed kinetics assuming that the collisional efficiency near 1000 K is about 0.1.

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“…As described in detail in our earlier work [3][4][5] (corresponding to pressures in the range 1 -10 bar).…”

Section: Experimental Technique and Resultsmentioning

confidence: 99%

Shock wave study and theoretical modeling of the thermal decomposition of c-C₄F₈

Cobos

Hintzer²,

Sölter

et al. 2015

Phys. Chem. Chem. Phys.

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The thermal dissociation of octafluorocyclobutane, c-C4F8, was studied in shock waves over the range 1150-2300 K by recording UV absorption signals of CF2. It was found that the primary reaction nearly exclusively produces 2 C2F4 which afterwards decomposes to 4 CF2. A primary reaction leading to CF2 + C3F6 is not detected (an upper limit to the yield of the latter channel was found to be about 10 percent). The temperature range of earlier single pulse shock wave experiments was extended. The reaction was shown to be close to its high pressure limit. Combining high and low temperature results leads to a rate constant for the primary dissociation of k1 = 10(15.97) exp(-310.5 kJ mol(-1)/RT) s(-1) in the range 630-1330 K, over which k1 varies over nearly 14 orders of magnitude. Calculations of the energetics of the reaction pathway and the rate constants support the conclusions from the experiments. Also they shed light on the role of the 1,4-biradical CF2CF2CF2CF2 as an intermediate of the reaction.

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Shock Wave Study of the Thermal Dissociations of C₃F₆and c-C₃F₆. I. Dissociation of Hexafluoropropene

Cited by 16 publications

References 38 publications

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

The Spin‐Forbidden Reaction of Ground‐State Sulfur Atoms with Ethylene

Shock wave study and theoretical modeling of the thermal decomposition of c-C₄F₈

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Shock Wave Study of the Thermal Dissociations of C3F6and c-C3F6. I. Dissociation of Hexafluoropropene

Cited by 16 publications

References 38 publications

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

The Spin‐Forbidden Reaction of Ground‐State Sulfur Atoms with Ethylene

Shock wave study and theoretical modeling of the thermal decomposition of c-C4F8

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Shock Wave Study of the Thermal Dissociations of C₃F₆and c-C₃F₆. I. Dissociation of Hexafluoropropene

Shock wave study and theoretical modeling of the thermal decomposition of c-C₄F₈