Investigation of the Production of Trifluoroacetic Acid from Two Halocarbons, HFC-134a and HFO-1234yf and Its Fates Using a Global Three-Dimensional Chemical Transport Model

Autor: Richard G. Derwent, Isabel Driscoll, M. Anwar H. Khan, Carl J. Percival, Rayne Holland, Andrew J. Orr-Ewing, Dudley E. Shallcross, Rabi Chhantyal-Pun, Craig A. Taatjes

Publikováno v: Holland, R E T, Khan, M A H, Driscoll, I, Chhantyal-Pun, R, Derwent, R G, Taatjes, C A, Orr-Ewing, A J, Percival, C J & Shallcross, D E 2021, ' Investigation of the Production of Trifluoroacetic Acid from Two Halocarbons, HFC-134a and HFO-1234yf and Its Fates Using a Global Three-Dimensional Chemical Transport Model ', ACS Earth and Space Chemistry, vol. 5, no. 4, pp. 849-857 . https://doi.org/10.1021/acsearthspacechem.0c00355

Trifluoroacetic acid (TFA), a highly soluble and stable organic acid, is photochemically produced by certain anthropogenically emitted halocarbons such as HFC-134a and HFO-1234yf. Both these halocarbons are used as refrigerants in the automobile indu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f339b3ddf12b586bf12df8c58c13af91
https://doi.org/10.1021/acsearthspacechem.0c00355

Impact of Criegee Intermediate Reactions with Peroxy Radicals on Tropospheric Organic Aerosol

Autor: Rabi Chhantyal-Pun, Dudley E. Shallcross, Andrew J. Orr-Ewing, Carl J. Percival, Nicholas Zachhuber, M. Anwar H. Khan

Publikováno v: Chhantyal Pun, R, Khan, M A H, Zachhuber, N, Percival, C, Shallcross, D E & Orr-Ewing, A J 2020, ' Impact of Criegee Intermediate Reactions with Peroxy Radicals on Tropospheric Organic Aerosol ', ACS Earth and Space Chemistry, vol. 4, 10, pp. 1743-1755 . https://doi.org/10.1021/acsearthspacechem.0c00147

Peroxy radicals and carbonyl oxides (Criegee intermediates) are produced in the troposphere during OH and ozone-initiated oxidation of hydrocarbons. Reactions between these species have previously been shown to form highly oxidized molecules which ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62e610c651296cd80ccdb74a9284de1f
https://research-information.bris.ac.uk/ws/files/251928968/Criegee_peroxy_accepted_version.pdf

Criegee Intermediate–Alcohol Reactions, A Potential Source of Functionalized Hydroperoxides in the Atmosphere

Autor: Rabi Chhantyal-Pun, Laura McMahon, Max R. McGillen, Basile F. E. Curchod, Joseph M. Beames, Dudley E. Shallcross, Nathan A. I. Watson, Andrew J. Orr-Ewing, M. Anwar H. Khan

Publikováno v: ACS earth and space chemistry, 2017, Vol.1(10), pp.664-672 [Peer Reviewed Journal]
ACS Earth and Space Chemistry
McGillen, M, Curchod, B, Chhantyal Pun, R, Beames, JM, Watson, N P, Khan, A, McMahon, L, Shallcross, D & Orr-Ewing, A 2017, ' Criegee Intermediate–Alcohol Reactions, A Potential Source of Functionalized Hydroperoxides in the Atmosphere ', ACS Earth and Space Chemistry, vol. 1, no. 10, pp. 664-672 . https://doi.org/10.1021/acsearthspacechem.7b00108

Ozonolysis, the mechanism by which alkenes are oxidized by ozone in the atmosphere, produces a diverse family of oxidants known as Criegee intermediates (CIs). Using a combination of newly acquired laboratory data and global atmospheric chemistry and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a48be3837d2ac2acc1fd84150eda1ce
https://doi.org/10.1021/acsearthspacechem.7b00108

Broadband terahertz gas spectroscopy through multimode self-mixing in a quantum cascade laser

Autor: M. Henry, T. Rawlings, Brian N. Ellison, R. Dong, Alexander Valavanis, James Keeley, Jonathan R. Partington, Paul Dean, Lianhe Li, Rabi Chhantyal-Pun, O. Auriacombe, M. L. G. Oldfield, Edmund H. Linfield, Yingjun Han, N. Brewster, E. Nuttall, Alexander Giles Davies

Publikováno v: Terahertz Emitters, Receivers, and Applications X.

We present a self-mixing terahertz-frequency gas spectroscopy technique using a multimode quantum cascade laser. A precision-micro-machined external waveguide module and a double-metal quantum cascade laser device are used to increase the optical fee

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::edf52d0d576b1879e423cc38a31e8847
https://doi.org/10.1117/12.2528683

Investigating the Atmospheric Sources and Sinks of Perfluorooctanoic Acid Using a Global Chemistry Transport Model

Autor: Andrew J. Orr-Ewing, M. Anwar H. Khan, Rabi Chhantyal-Pun, Carl J. Percival, Dudley E. Shallcross, Craig A. Taatjes, Rayne Holland

Publikováno v: Atmosphere, Vol 11, Iss 407, p 407 (2020)
Holland, R, Khan, M A H, Chhantyal Pun, R, Orr-Ewing, A J, Percival, C, Taatjes, C A & Shallcross, D E 2020, ' Investigating the atmospheric sources and sinks of Perfluorooctanoic acid using a global chemistry transport model ', Atmosphere, vol. 11, no. 4, 407 . https://doi.org/10.3390/atmos11040407
Atmosphere
Volume 11
Issue 4

Perfluorooctanoic acid, PFOA, is one of the many concerning pollutants in our atmosphere
it is highly resistant to environmental degradation processes, which enables it to accumulate biologically. With direct routes of this chemical to the envir

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::792f4021fa5af16977da2471e69c85ba
https://doi.org/10.3390/atmos11040407