Trichlorofluoromethane, also called freon-11, CFC-11, or R-11, is a chlorofluorocarbon (CFC). It is a colorless, faintly ethereal, and sweetish-smelling liquid that boils around room temperature. [5] CFC-11 is a Class 1 ozone-depleting substance which …

Dec 2, 2021 · Trichloromethane, also known as CFC-11, made headlines in 2018 when scientists alerted us of an unexpected increase in global CFC-11 emissions. Unexpected, because CFC-11 has been banned since 2010, as it was one of the gases that …

Five years after an unexpected spike in emissions of the banned ozone-depleting chemical chlorofluorocarbon CFC-11, emissions dropped sharply between 2018 and 2019, new analyses of global air measurements show.

Since 1977 five different sampling programs within The Halocarbons and other Atmospheric Trace Species (HATS) group have measured chlorofluorocarbon-11 (CFC-11). These programs include three flask systems and two in situ programs.

Feb 10, 2021 · An international research team, including scientists from MIT, have observed a global reduction of the banned ozone-depleting chemical CFC-11, after it spiked unexpectedly several years ago.

Feb 10, 2021 · Here we report an accelerated decline in the global mean CFC-11 concentration during 2019 and 2020, derived from atmospheric concentration measurements at remote sites around the world.

Refrigerant R11 is chlorofluorocarbon (CFC). Among all the refrigerants commonly used for the refrigeration and air conditioning applications, R11 has the highest potential to cause the depletion of the ozone layer from the upper layers of the atmosphere and the greenhouse effect.

Jul 22, 2019 · Trichlorofluoromethane, also known as CFC-11 and Freon 11, is a refrigerant, aerosol propellant, and foam-blowing agent. It is unusual in that its boiling point is at normal ambient temperature and pressure, so it can be handled as a liquid or gas.

Mar 17, 2020 · While the ozone layer is on a recovery path, scientists have found unexpectedly high emissions of CFC-11 and CFC-12, raising the possibility of production of the banned chemicals that could be in violation of the landmark global treaty.

Jun 25, 2024 · Results indicate that CFC-11 emissions in the Pearl River Delta region have returned to levels before 2010, aligning with regional and global trends. Observations from XCG would compensate for the deficiency of CFC-11 measurements in southeastern China, paving the road for ODS studies in this region and beyond.