Carbon dioxide equivalents

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). 

The results were calculated using the SIMA Pro software. To obtain the necessary results, the Recipe Midpoint (H) Europe method has been chosen as a characterization model. Results come from the climate change impact category and they are expressed in kg of a carbon dioxide equivalent (C02e). 

It has long been known that it is difficult to wash chromia gel free of ammonium nitrate when it is prepared by methods similar to ours (2, S). A sample of our gel was analyzed in duplicate by the Micro-Tech Laboratories, Skokie, Illinois and reported to contain carbon, 1.26, 1.45% nitrogen, 2.60, 2.68% hydrogen, 3.12, 3.23%. Distillation from a solution of sodium hydroxide liberated ammonia equivalent to 1.60% nitrogen. Distillation from 3% sulfuric acid liberated carbon dioxide equivalent to 0.28% carbon. The nature of the remaining carbon is unknown. Infrared absorption of the pellets described in Section XI,A exhibited a sharp line at 1384 cm i characteristic of both NO3 and COg. Analysis of catalysts deliberately doped with urea established that urea, if any, corresponded to less than 0.15% carbon and 0.35% nitrogen. 

The subsurface sample also contained 7.9% carbon dioxide, equivalent to 25% limestone (CaCOd- ... 

IPCC) model. According to this model, GHG emission is reported in carbon dioxide equivalent unit. This is a quantity that describes for a given mixture and amount of GHG the amount of COj that would have the same GWP when measured over a specified timescale (generally, 100 years). The CO2 equivalent of methane emission is 25 according to this model. This is the characterization factor for methane, which means 1 kg of methane emission will have the same GWP impact as 25 kg of CO2. 

Figure 8.30 Energy consumption (a) and carbon dioxide equivalent amount (b) for PLLA production. In Case (1), used PLLA is disposed by reclamation and equivalent amount of PLLA is produced from corn. In Case (2), used PLLA is disposed by incineration, the energy is utilized for power generation, and equivalent amount of PLLA is produced from com. In Case (3), used PLLA is recycled by hydrolytic degradation, lactide production and polymerization, and PLLA with equivalent amount of which is lost during recycling is produced from com [433]. (Reproduced from [433] with permission from Society of Environmental Science, Japan 2009.)...

Carbon Dioxide Equivaient A metric measure used to compare the emissions from various greenhouse gases based upon their global warming potential (GWP). Carbon dioxide equivalents are commonly expressed as million metric tons of carbon dioxide equivalents (MMTCOgEq). The carbon dioxide equivalent for a gas is derived by multiplying the tons of the gas by the associated GWR... 

Total energy from renewable resource consumption per 1 kg of product Total energy from nonrenewable resource consumption per 1 kg of product Total energy from resource consumption per 1 kg of product Mass of renewable resource r used to produce 1 kg of input i Mass of nonrenewable resource nr used to produce 1 kg of input i Carbon dioxide equivalent per 1 kg of product... 

Key information about each of the selected strategies, such as greenhouse gas reduction potential, a numerical score calculated by AirportGEAR based on the rating values for the evaluation criteria, unit cost of carbon in dollars per metric ton of carbon dioxide equivalent reduced, and applicability to Scope 1 (direct), Scope 2 (indirect), and Scope 3 (other) emissions... 

The potential emissions reductions in metric tonnes of carbon dioxide equivalent (MTCOze) that were computed in the INVENTORY REDUCTIONS feature. 

You can enter estimated cost information for each strategy, such as capital cost or net present value, depending on your preference and availability of information. The REDUCTIONS component will use this data to compute a unit cost of carbon emissions reduced in dollar per metric tonne of carbon dioxide equivalent (MTC02e) based on the emissions reduction calculated in STEP 3. The estimated range of cost from the Fact Sheet is displayed for your reference. 

Several aspects must be considered for a comparison of energy sources that generate electricity. The first one is the quantity of carbon dioxide equivalent/kWh rejected by energy sources. Figure 1.3 shows the relationship between the CO2 production and the reaction (response time) for a number of electric power suppliers [11]. It is evident that the response time of nuclear plant (48 h) is bigger than hydro-electric dam or renewable systems such as wind mill and photovoltaic (few seconds). In the middle are the electric power stations using coal, oil or gas. 

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