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Emission Reduction Options for the Onshore Natural Gas Transmission and Underground Storage Segment

The EPA estimates methane emissions from the oil and natural gas industry in its annual Inventory of U.S. Greenhouse Gas Emissions and Sinks. The onshore natural gas transmission and underground storage segment contributes 25% to the total methane emissions from the oil and natural gas industry. The chart on the right shows the distribution of the top emission sources* in this segment, which represent 76% of the total emissions from natural gas transmission and underground storage. Click on each emission source category to view one of many appropriate, cost-effective methane mitigation options below. A full list of emission mitigation options can be found here.

*Note: These emission estimates have an uncertainty associated with them. Not all facilities will have the same distribution of emissions between sources. Also, some emission sources are only present in a few facilities and may not be represented in the pie chart.

This pie chart breaks out five major emission sources from the Onshore Natural Gas Transmission and Underground Storage segment.  The largest source of emissions is from Reciprocating Compressor Rod Packing, which account for 41% of emissions.  Fugitive emissions are second, accounting for 11%.  Centrifugal Compressor Wet Seals are third, making up 10%.  Station Venting and Pipeline Venting rank fourth and fifth, each accounting for 7% of emissions. Other emission sources make up the remaining 24% of emissions.

“Other” Emission Sources: Pneumatic Devices, Uncombusted Methane, Centrifugal Compressors with Dry Seals, Dehydrator Vents



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+ Reducing Methane Emissions from Reciprocating Compressor Rod Packing

+ Directed Inspection and Maintenance at Compressor Stations

+ Replacing Wet Seals with Dry Seals in Centrifugal Compressors

+ Reducing Emissions When Taking Compressors Off-Line

+ Using Pipeline Pumpdown Techniques to Lower Gas Line Pressures Before Maintenance



Need Help?
EPA can assist with all questions related to technologies and practices to reduce methane emissions. To contact us click here.

 


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