How leaky is natural gas production? One puzzle solved

Shiny new natural gas power plants like this one in North Carolina have replaced a number of old coal-burning plants.

Enlarge / Shiny new natural gas power plants like this one in North Carolina have replaced a number of old coal-burning plants. (credit: Duke Energy / Flickr)

In the US, the effort to slash the CO2 emissions of our electrical grid has actually gotten an early bump from the low price of natural gas. New natural gas plants can produce electricity with about half the emissions of the older, dirtier (and now more expensive) coal plants they’re replacing. But there has been a lot of debate over a drawback that eats into that gain: some of the natural gas leaks into the atmosphere during production and transportation. Precisely how much methane (a greenhouse gas) leaks is important—leak enough and natural gas isn’t actually better than coal.

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Some estimates have suggested that leaks were a serious problem, while others produced much lower numbers. Now, a new study figures out why the different analyses produced a range of numbers: it depends on the time of day people were looking for leaks.

Top down or bottom up?

Studies estimating real-world leakage have come in two primary flavors. The first type of study uses what is referred to as a “bottom-up” approach. This involves walking around gas wells and pipeline equipment while measuring leakage. With estimates for each process or type of equipment, you scale up to the big picture based on an inventory of equipment and records of the amount of natural gas produced.

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Post Author: martin

Martin is an enthusiastic programmer, a webdeveloper and a young entrepreneur. He is intereted into computers for a long time. In the age of 10 he has programmed his first website and since then he has been working on web technologies until now. He is the Founder and Editor-in-Chief of and Online Magazines. His colleagues appreciate him as a passionate workhorse, a fan of new technologies, an eternal optimist and a dreamer, but especially the soul of the team for whom he can do anything in the world.

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