Global warming potential, GWP

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

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

Because of the different properties and lifetimes in the atmosphere associated with each of the GHGs, emissions are typically reported as teragrams (Tg), or million metric tons, of carbon dioxide equivalent, C02eq-The 100-year time horizon global warming potential (GWP) of CH4 is 25 times as potent as CO2, N2O is 298 times as potent as CO2, and the halocar-bons range from 124 to 14,800 times as potent as CO2 (IPCC, 2007). 

Hydrocarbons (predominantly, NG) are likely to play a major role in hydrogen production in the near- to medium-term future. However, hydrocarbons significantly contribute to anthropogenic C02 emissions into the atmosphere. Spath and Mann [11] estimated that the global warming potential (GWP) of hydrogen production by the SMR process is 13.7 kg C02 (equiv.) per kg of net hydrogen produced. GWP is defined as a combination of C02, CH4, and N20 emissions expressed as C02 equivalence for a 100-year time frame. 

FIGURE 14-23 Global warming potentials (GWP) relative to C02 for N20, C2F(), HFC-134a, and HCFC-225ca as a function of time (adapted from IPCC, 1996). 

Table 13. Global Warming Potentials (GWPs) of Various Greenhouse Gases...

Conversion factors for global warming potential (GWP) are expressed in terms of C02 equivalency (kg C02 equivalent), as given in Table 4. Using GWP values, emissions to the air of various substances can be converted to an equivalent C02 global-warming effect by means of the following formula ... 

Table 1.2. Greenhouse gases and global warming potentials (GWPs).

TO precursor, estimates of global warming potential (GWP) can be obtained from integration data of the response of methane and TO to RF over a 100-year period. For example, the combined impact of methane and TO gives a GWP of 23.3. 

Table 2. Global warming potentials (GWP) for some representative organoflu-orine compounds [8,13], A range of values is given where sources differ...

Gt CO2 equiv. 29 Gt anthropogenic CO2 discharges/year x 100) to the global warming potential (GWP) of actual carbon dioxide discharges from human activity. 

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