Infrared absorption cross-sections, radiative efficiency and global warming potential of HFC-43-10mee

Abstract

HFC-43-10mee (C5H2F10) is a substitute for CFC-113, HCFC-141b and methyl chloroform, as well as an alternative to perfluorocarbons with high radiative efficiencies. Recent observations have shown that the global mean tropospheric abundance of HFC-43-10mee has increased steadily from the 1990s to reach 0.211ppt in 2012. To date, the emission of this compound is not regulated.The radiative efficiency (RE) of HFC-43-10mee has recently been re-evaluated at 0.42Wm−2ppb−1, giving a 100-year time horizon global warming potential (GWP100) of 1650. However, the initial RE, from which the new values were derived, originated from an unpublished source.We calculated a new RE of 0.36Wm−2ppb−1 and a GWP100 of 1410 from laboratory absorption cross-section spectra of a pure vapour of HFC-43-10mee. Acquisitions were performed in the 550–3500cm−1 spectral range using Fourier transform spectroscopy. The results were compared with the broadened spectra from the Pacific Northwest National Laboratory (PNNL) database and with theoretical calculations using density functional theory.