Reaction kinetics of (CF3)2CFCN with OH radicals as a function of temperature (278–358 K): A good replacement for greenhouse SF6?

Blázquez, Sergio; Antiñolo, María; Nielsen, Ole John; Albaladejo, José; Jiménez, Elena

doi:10.1016/j.cplett.2017.09.039

Cited by 32 publications

(24 citation statements)

References 14 publications

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“…Two of the compounds added are based on RE values from the literature and RE for the remaining two compounds have been calculated using absorption spectra from PNNL. Heptafluoroisobutyronitrile is a potential replacement for sulfur hexafluoride and its atmospheric chemistry has been studied by Blazquez et al (2017) and Andersen et al (2017). The RE value of 0.25 W m −2 ppb −1 in Table 5 is an average of the REs from the two studies.…”

Section: Fully Fluorinated Speciesmentioning

confidence: 99%

Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers

Hodnebrog

Aamaas

Fuglestvedt

et al. 2020

Reviews of Geophysics

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Human activity has led to increased atmospheric concentrations of many gases, including halocarbons, and may lead to emissions of many more gases. Many of these gases are, on a per molecule basis, powerful greenhouse gases, although at present‐day concentrations their climate effect is in the so‐called weak limit (i.e., their effect scales linearly with concentration). We published a comprehensive review of the radiative efficiencies (RE) and global warming potentials (GWP) for around 200 such compounds in 2013 (Hodnebrog et al., 2013, https://doi.org/10.1002/rog.20013). Here we present updated RE and GWP values for compounds where experimental infrared absorption spectra are available. Updated numbers are based on a revised “Pinnock curve”, which gives RE as a function of wave number, and now also accounts for stratospheric temperature adjustment (Shine & Myhre, 2020, https://doi.org/10.1029/2019MS001951). Further updates include the implementation of around 500 absorption spectra additional to those in the 2013 review and new atmospheric lifetimes from the literature (mainly from WMO (2019)). In total, values for 60 of the compounds previously assessed are based on additional absorption spectra, and 42 compounds have REs which differ by >10% from our previous assessment. New RE calculations are presented for more than 400 compounds in addition to the previously assessed compounds, and GWP calculations are presented for a total of around 250 compounds. Present‐day radiative forcing due to halocarbons and other weak absorbers is 0.38 [0.33–0.43] W m−2, compared to 0.36 [0.32–0.40] W m−2 in IPCC AR5 (Myhre et al., 2013, https://doi.org/10.1017/CBO9781107415324.018), which is about 18% of the current CO2 forcing.

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Section: Fully Fluorinated Speciesmentioning

confidence: 99%

Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers

Hodnebrog

Aamaas

Fuglestvedt

et al. 2020

Reviews of Geophysics

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“…Another series of experiments were conducted by Blázquez and colleagues in which they examined the temperature dependence of the reaction of hydroxyl radical with Novec 4710 gas [23]. Hydroxyl radicals were produced by photolysis of HNO 3 .…”

Section: Environmental Considerations 41 Global Warming Potentialsmentioning

confidence: 99%

Recent Development of Two Alternative Gases to SF6 for High Voltage Electrical Power Applications

et al. 2021

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For many years, SF6 has been the preferred dielectric medium in electrical power applications, particularly in high voltage gas-insulated equipment. However, with the recognition that SF6 has an extremely long atmospheric lifetime and very high global warming potential, governments have pursued emission reductions from gas-filled equipment. The electrical power industry has responded to this environmental challenge applying SF6-free technologies to an expanding range of applications which have traditionally used SF6, including gas-insulated switchgear, gas-insulated circuit breakers and gas-insulated lines or bus bars. Some of these SF6-free solutions include gas mixtures containing fluorinated compounds that have low climate impact, among them, a fluoronitrile and a fluoroketone developed as 3M™ Novec™ 4710 Insulating Gas and 3M™ Novec™ 5110 Insulating Gas, respectively. Both fluoronitrile and fluoroketone mixtures are successfully used in gas-insulated equipment currently operating on the grid where they reduce greenhouse gas emissions by more than 99% versus SF6. This paper reviews these leading components of alternative-gas mixtures with updates on the performance, safety and environmental profiles in electrical power applications.

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“…33 The experimental UV system used was described previously. 32,[34][35][36][37] A 30 W deuterium lamp (Oriel, model: Q Series Low Power) was used to irradiate the gas mixture in the absorption cell. The transmitted light was focused on a 0.5 m spectrometer (Chromex 500 is/ms), which has a grating (300 groves per mm with a spectral resolution of 0.19 nm) that disperses the radiation.…”

Section: Measurement Of Gas-phase Ch 3 Cho Concentrationsmentioning

confidence: 99%

The impact of water vapor on the OH reactivity toward CH3CHO at ultra-low temperatures (21.7–135.0 K): Experiments and theory

Neeman

González

Blázquez

et al. 2021

The Journal of Chemical Physics

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The role of water vapor (H2O) and its hydrogen-bonded complexes in the gas-phase reactivity of organic compounds with hydroxyl (OH) radicals has been subject of many recent studies. Contradictory effects have been reported at temperatures between 200 and 400 K. For the OH+acetaldehyde reaction, a slight catalytic effect of H2O was previously reported at temperatures between 60 and 118 K. In this work, we used Laval nozzle expansions to reinvestigate the impact of H 2 O on the OH-reactivity with acetaldehyde between 21.7 and 135.0 K. The results of this comprehensive study demonstrate that instead water slows down the reaction by a factor of ˜3 (21.7 K) and ˜2 (36.2 -89.5 K), almost no effect of added H 2 O was observed at 135.0 K.

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Reaction kinetics of (CF3)2CFCN with OH radicals as a function of temperature (278–358 K): A good replacement for greenhouse SF6?

Cited by 32 publications

References 14 publications

Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers

Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers

Recent Development of Two Alternative Gases to SF6 for High Voltage Electrical Power Applications

The impact of water vapor on the OH reactivity toward CH3CHO at ultra-low temperatures (21.7–135.0 K): Experiments and theory

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