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Cutting Carbon - Season 9

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Methane slip calculator

Methane Slip refers to the release of unburned methane from engines running on natural gas. While this can occur in both reciprocating gas engines (recips) and gas turbines, methane slip in recips are almost 150 times higher than that of a gas turbine.

This calculator can help you:

Estimate the total greenhouse gas (GHG) savings per year depending on your power plant output and capacity factor
Calculate reductions in NOx and particulate matter (PM) based on the US EPA's emission factors
Compare the amount of methane slip that can occur during the operation of reciprocating engines and gas turbines

The US EPA (Environmental Protection Agency) publishes Emission Factors for methane for various technologies, and these factors are used in this calculator.

Calculate energy & potential GHG avoided by gas turbine technology

Power plant output *

Capacity factor (percentage hours in operation) *

Continue

This calculator can help you:

Estimate the total greenhouse gas (GHG) savings per year depending on your power plant output and capacity factor
Calculate reductions in NOx and particulate matter (PM) based on the US EPA's emission factors
Compare the amount of methane slip that can occur during the operation of reciprocating engines and gas turbines

Greenhouse gas (GHG) emissions reduced by your plant*

Potential methane avoided by using GE Vernova gas turbine technology

tons/year

reduction

Potential GHG avoided by using GE Vernova gas turbine technology

tons/year

reduction

Energy generated

MWh/year

This is equivalent to taking cars off the road.

Total emissions and savings

Total GHG** emissions (1000 t CO2e/yr)

Methane emissions (t/yr)

Almost 200x more methane!

PM** emissions (Total) (t/year)

NOx** emissions (t/year)

Learn more

**Key:

GHG – greenhouse gases
PM – particulate matter
NOx – nitrous oxides
CC – combined cycle
SC – simple cycle
GT – gas turbine
RICE – reciprocating internal combustion engine
NG – natural gas
GWP20 – global warming potential for 20 years

Heat rates

kJ/kWh

GT Combined cycle

5,800

GT Simple cycle

8,800

Reciprocating engines

7,800

Coal

10,900

Notes & references:
Emission factors: US Environmental Protection Agency Air Emission Factors, AP42 Go to link
GWP20** of CH4:86: Intergovernmental Panel on Climate Change (IPCC) Go to link

*GHG emission calculations here do not consider the origin/source of the gas. The calculations reflected only consider the net effect of GHG emissions due to the difference in technology used at the point of combustion.

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		GT Combined Cycle	GT Simple Cycle	Reciprocating Engines
CO2	lb/MMBTU	110	110	110
NOx	lb/MMBTU	0.099	0.099	4.08
TOC	lb/MMBTU	0.011	0.011	1.47
Methane	lb/MMBTU	0.0086	0.0086	1.25
PM (total)	lb/MMBTU	0.0066	0.0066	0.00991

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