The following table includes the 100-year time horizon global warming potentials (GWP) relative to CO2. This table is adapted from the IPCC Fifth Assessment Report, 2014 (AR5)i.

Mar 14, 2022 · Perfluorocyclobutane (c-C 4 F 8, PFC-318, octafluorocyclobutane, CAS 115-25-3) is a potent greenhouse gas (GHG) with a global warming potential of 10 200 on a 100-year timescale (GWP 100) based on a lifetime estimate of 3200 years (Forster et al., 2021).

Species. Chemical formula. Lifetime (years) Global Warming Potential (Time Horizon) 20 years. 100 years. 500 years. Carbon dioxide. CO 2. variable § 1. 1. 1. Methane *

We reconstruct atmospheric abundances of the potent greenhouse gas c-C4F8 (perfluorocyclobutane, perfluorocarbon PFC-318) from measurements of in situ, archived, firn, and aircraft air samples with precisions of ∼1 %–2 % reported on the SIO-14 gravimetric calibration scale.

18 emissions (using global warming potentials, GWP), which may contain c-C4F8 emissions, most notably Japan (3,260 19 (2013) – 19,900 (1997) Gg CO2-eq.), followed by much smaller amounts from France (~139 (2000) – 518 (2012) Gg 20 CO2-eq.) and a …

Nov 4, 2021 · We find a global emission factor of ~0.003 kg c-C4F8 per kg of HCFC-22 FS pyrolyzed. Mitigation of these c-C4F8 emissions, e.g., through process optimization, abatement, or different...

Jan 28, 2025 · The emissions are usually expressed in carbon dioxide equivalents using the global warming potential, which allows the effective contributions of different gases to be compared. The addition of man-made greenhouse gases to the Atmosphere disturbs the earth's radiative balance.

high C/F ratio of C4F8 is believed to induce the formation of a C:F film on Si or SiN, which acts as an etching barrier, thus improving the selectivity. However, c-C4F8 is a PFC with a very high global-warming potential (GWP). So we have investigated perfluoro-2-butene (l-C4F8) and Hexafluoroprop- ene (l-C3F6) as an alternative. The

e potent greenhouse gas perfluorocyclobutane (c-C4F8, PFC-318, octafluorocy-clobutane) 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 hyd.

Air samples collected at Cape Grim, Tasmania between 1978 and 2008 and during a series of more recent aircraft sampling programmes have been analysed to determine the atmospheric abundance and trend of octafluorocyclobutane (c-C4F8 or PFC-318). c-C4F8 has an atmospheric lifetime in excess of 3000 yr and a global warming potential (GWP) of 10 ...