Ozone global warming potential

Global warming potential (infra-red absorption) Ozone depletion A compound s ability to absorb infra-red radiation The ability of a chemical to reach the stratosphere and interact with and destroy ozone Global warming potential (GWR) Preferred CWR less than carbon dioxide) Atmospheric lifetime... 

Under these provisions, EPA must list ail regulated substances along with their ozone-depleHon potenhal, atmospheric lifetimes and global warming potentials within 60 days of enactment. 

Ozone Depletion Potential (ODP) Global Warming Potential (GWP) ... 

Ozone depletion polential (ODP) and global warming potential (GWP) ol various foam blowing agents. 

Ozone Depletion Potential. This is calculated in a similar manner to global warming potential and is expressed relative to CFC-11. Factors for all common gases having significant effects on the ozone layer have been calculated. 

Kayukawa et al. [17] studied the PVT properties of triiluoromethyl methyl ether, because it is a possible refrigerant with zero ozone depletion potential and low global-warming potential. One series of their data is shown in Table 5.6. Calculate Z, the compressibihty factor, and the molar volume in mol m from the given data, and fit the data for Z as a function of 1 /Pm to both a linear and a quadratic equation to see whether a third virial coefficient is warranted by the data. 

The potential advantages of using derivatized and immobihzed solvents include reduced VOC emissions, negligible global warming potential, no ozone depleting potential, cleaner and easier separations from water, and reduced solvent contamination in aqueous waste streams. 

Ozone depletion potential (ODP) Global warming potential... 

Hydrofluorocarbons (HFCs), including 1,1,1,2-tetrafluoroethane (HFC-134a), have been developed as alternatives to chlorofluorocarbons (CFCs), which are known to contribute to the breakdown of ozone to oxygen in the stratosphere. HFCs do not contribute to the destruction of stratospheric ozone, but some HFCs have global warming potential. They primarily serve as replacements for CFCs in refrig... 

These include toxicity, flammability, explosivity, stratospheric ozone depletion, atmospheric ozone production and global warming potential.[27] Bearing all these criteria in mind, the alternative solvents mentioned above provide an excellent range of properties with considerable potential. 

Globally, the oxides of nitrogen, NO (nitric oxide), NO2 (nitrogen oxide), and N2O (nitrous oxide), are key species involved in the chemistry of the troposphere and stratosphere. NO and N2O are produced mostly by microbial soil activity, whereas biomass burning is also an important source of NO. Nitric oxide is a species involved in the photochemical production of ozone in the troposphere, is involved in the chemical produaion of nitric acid, and is an important component of acid precipitation. Nitrous oxide plays a key role in stratospheric ozone depletion and is an important greenhouse gas, with a global warming potential more than 200 times that of CO2. 

An ideal CFC substitute is one that offers identical performance properties of the CFC it replaces with the added stipulation that it does not destroy the ozone layer and has low global warming potential. Low toxicity, a property of CFCs, and shorter atmospheric lifetimes compared to CFCs are also preferred. Summarized, the desired characteristics include short atmospheric lifetimes, low toxicity, ozone compatibility, low global warming potential, thermal and chemical stability, equivalent physical properties, and amenability to realistic processes. 

Information on any other adverse effects to the environment should be included where available, such as environmental fate (exposure), ozone depletion potential, photochemical ozone creation potential, endocrine disrupting potential and/or global warming potential. 

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