TY  - JOUR
A1  - Mühle, Jens
A1  - Kuijpers, Lambert J. M.
A1  - Stanley, Kieran M.
A1  - Rigby, Matthew
A1  - Western, Luke M.
A1  - Kim, Jooil
A1  - Park, Sunyoung
A1  - Harth, Christina M.
A1  - Krummel, Paul B.
A1  - Fraser, Paul J.
A1  - O'Doherty, Simon
A1  - Salameh, Peter K.
A1  - Schmidt, Roland
A1  - Young, Dickon
A1  - Prinn, Ronald G.
A1  - Wang, Ray H. J.
A1  - Weiss, Ray F.
T1  - Global emissions of perfluorocyclobutane (PFC-318, c-C4F8) resulting from the use of hydrochlorofluorocarbon-22 (HCFC-22) feedstock to produce polytetrafluoroethylene (PTFE) and related fluorochemicals
T2  - Atmospheric chemistry and physics
N2  - Emissions of the potent greenhouse gas perfluorocyclobutane (c-C4F8, PFC-318, octafluorocyclobutane) into the global atmosphere inferred from atmospheric measurements have been increasing sharply since the early 2000s. We find that these inferred emissions are highly correlated with the production of hydrochlorofluorocarbon-22 (HCFC-22, CHClF2) for feedstock (FS) uses, because almost all HCFC-22 FS is pyrolyzed to produce (poly)tetrafluoroethylene ((P)TFE) and hexafluoropropylene (HFP), a process in which c-C4F8 is a known by-product, causing a significant fraction of global c-C4F8 emissions. We find a global emission factor of ∼0.003 kg c-C4F8 per kilogram of HCFC-22 FS pyrolyzed. Mitigation of these c-C4F8 emissions, e.g., through process optimization, abatement, or different manufacturing processes, such as refined methods of electrochemical fluorination and waste recycling, could reduce the climate impact of this industry. While it has been shown that c-C4F8 emissions from developing countries dominate global emissions, more atmospheric measurements and/or detailed process statistics are needed to quantify c-C4F8 emissions at country to facility levels.
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/75166
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-751662
SN  - 1680-7324
N1  - Funding: National Aeronautics and Space Administration ; NNX16AC96G
N1  - Funding: National Aeronautics and Space Administration ; NNX16AC97G
N1  - Funding: National Aeronautics and Space Administration ; NNX16AC98G
N1  - Funding: Department for Business, Energy and Industrial Strategy, UK Government ; 1537/06/2018
N1  - Funding: National Oceanic and Atmospheric Administration ; 1305M319CNRMJ0028
N1  - Funding: Commonwealth Scientific and Industrial Research Organisation
N1  - Funding: Bureau of Meteorology, Australian Government
N1  - Funding: National Research Foundation of Korea ; 2020R1A2C3003774
N1  - Funding: Natural Environment Research Council ; NE/S004211/1
N1  - Funding: Natural Environment Research Council ; NE/V002996/1
N1  - Funding: Natural Environment Research Council ; NE/N016548/1
VL  - 22
IS  - 5
SP  - 3371
EP  - 3378
PB  - EGU
CY  - Katlenburg-Lindau
ER  -