One way to reduce greenhouse gas emission is to prevent leakage from natural gas
ID: 154795 • Letter: O
Question
One way to reduce greenhouse gas emission is to prevent leakage from natural gas pipelines. If the leakage from a pipeline transmitting 250 million SCF of natural gas per day is reduced from 5% to .5%, use the data on global warming potential (GWP) in table 4.8(below) to estimate the equivalent amount of CO2 emissions that would need to be curtailed, assuming the period of interest is (a) 20 years, then (b) 100 years. For this calculation, assume that natural gas is adequately approximated by methane.
Explanation / Answer
well first calculate the 5 percent of 250million SCF then .5 percent that is we have to find 4.5 percent of gas is reduced of 250 million now find constituent of natural gas which consist of methane
second step- methane has a lifetime of 12.4 years and with climate-carbon feedbacks a global warming potential of 86 over 20 years and 34 over 100 years in response to emissions this thing is mentioned in graph ,co2 has 1 which is standardised and methane is given 12+3 for 100year it is given 21 for for 30 year
Values
Carbon dioxide has a GWP of exactly 1 (since it is the baseline unit to which all other greenhouse gases are compared).
20 years
100 years
GWP values and lifetimes from 2013 IPCC AR5 p714(with climate-carbon feedbacks)[6] Lifetime (years) GWP time horizon
20 years
100 years
Methane 12.4 86 34 HFC-134a (hydrofluorocarbon) 13.4 3790 1550 CFC-11 (chlorofluorocarbon) 45.0 7020 5350 Nitrous oxide (N2O) 121.0 268 298 Carbon tetrafluoride (CF4) 50000 4950 7350Related Questions
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